Bofors breech ring

bofors breech ring [4] The Japanese never developed a replacement for the 25mm/60 in the light antiaircraft role, nor did they develop a medium antiaircraft gun comparable to the 40mm Bofors. e. The 40mm that is on the wreck is also of interest, as it is a Mark 1 open base ring mount (a twin mounting), instead of the Mark 2 mounts that are The Bofors 40mm Automatic Gun L/70 in Deck Mounting, type SAK 40 N67 is a close-range anti-aircraft weapon, mounted in a single-barrel mounting. It was used extensively by the Imperial Japanese Army and Collaborationist Chinese forces. Single-Shot, Breech-Loading Cavalry Carbine A soft copper ring, called a driving band, is forced into the spiral grooves in the barrel, the “rifling”, so giving the spin, necessary for accuracy. I got my insperation from and artical in the HSM/WSM magizine. a Breech Ring (1943) for the Ministry of Munitions. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed. 1878/10/31 , depending on a carriage type (31 stood for a year of acceptance of modernization). 7 cm/83 SK C/30 and had a much higher rate of fire. Alternative Designations: US M136, Bofors AT 4, FFV AT4 2S9: 120-mm self- propelled combination gun, with a turreted breech- Floor has tiedown rings. of a breech ring o- stationary part; a breechblock commonly referred to as the Bofors closure (Fig. The breech mechanism was of vertical sliding-block type. The housings for the guns are surprisingly common, which is again puzzling. RNN Van Spejik after World War II This ship served in the Kriegsmarine as K3 during World War II I have available a Bofors L/60 40mm Anti-Aircraft Gun (British Mk 1*), without mount or trailer. breech revolves another 90° CT Technology background (gun and feeder) The barrel was of one-piece forged construction, with uniform rifling (12 grooves, right-hand twist, one turn in 25 calibers). XI coastal defence guns were built in about 1910 as a piece of the original HMAS Sydney's armament. ) of TNT and self-destroyed after travelling for approximately 3200 m (3500 yds. At ranges of 500 meters or less, its shells could penetrate the armor of any enemy tank. 34 ft). The powder load for the shot in the video was 4 oz , keep in mind it has a very different pressure curve then black powder. 068 kg (0. Previously, this delicate operation was thought impossible for a woman to do. The M1939 had certain similarities with the later 40mm Bofors L/60 AA gun like clip feeding and a similar carriage. Hi Carbineone1964, My 40 mm weights 348 lb, yours must be substantially bigger to come in at 500 lbs. It was usable with the 40mm Bofors, the later 3''/50 AA gun, and the 5''/38, though it was designed for the Bofors and other guns required careful skill to compensate for the different ballistics. The "heart" of the weapon, the breech lock, breech ring, and recoil assembly was made in the Jefferson-Kercheval arsenal; most of the rest of the Bofors was made in Highland Park and Plymouth. guns the breech was opened in from three to four different operations which involved considerable loss of time. CARTRIDGE FEED PAWLS. She is making a Bofors Breech-ring. The wartime painting Ruby Loftus Screwing a Breech Ring by Laura Knight was created at ROF Newport. Recoil operated, air cooled and used five-round ammunition strips. 9 inches Caliber: L70 Weight (Complete): 3,420 lbs Saab Bofors AK-5. Breech, Three-Motion - Similar to a Four-Motion Breech, except that the breech was withdrawn into a hinged carrier ring. Although often listed as being 60 calibers long, all of these guns except for the Japanese version were actually 56. 75 m, diameter at the breech over one meter and weight 37. 1/96th. 8 at Kaliningrad. The surface is formed of a truncated ogive instead of a cylinder and cone, and the threaded jrartions are not alternate. Foot pedal held (and) fire lever prevents the gun being fired by the foot pedal when set to FOOT PEDAL HELD. Breech block is a vertical sliding type. The barrel is attached to the breech ring by interrupted threads (bayonet joint) and can be removed without dismounting the gun. Modernized guns were designated wz. Looking for breech bits that would have been attached onto breech ring Kit no. ROF, breech ring fitting, 1941/42 "If anyone ever wants an object-lesson on how to tackle a job and get on with that job despite what might appear to be insurmountable obstructions - shortage of building materials, of machinery, the priority claims of the Services on the one hand and the air raids on the other - I advise him to study the During the very last stretch of the ramming path the breech block 8 will be released from the impact ring 4 and consequently the breech block 8 will be accelerated towards its closing position. The barrel was attached to the breech ring via an interrupted screw design. Between the two is the gun loader holding a four-round ammunition clip. 06 vs 19. The Bofors 40 mm gun is a famous anti-aircraft autocannon designed by the Swedish firm of Bofors. 2045 required for 0. The gun with the smaller wheels could be an earlier model since I can't see the breech actuating lever so it could be an early breech (the second image is. The gun breech is 150 mm thick. Length (Overall): 272. Also in the early 1890s, Arent Silfversparre of Bofors invented an ogival screw breech, similar to the Armstrong model in the way it eliminated the need to withdraw the screw before swinging it to the side. Hero: This picture shows Ruby Loftus screwing a the breech ring of the Bofors gun - a skill which her pre-war male colleagues had taken nine years to learn, but she had done in two. 175G TNT M437 Shell marked: 175MM-M437- NOR-1970 LOT 1-5 As used with the M107 The Fisher Body Plant in Pontiac, MI built 2,359 90mm anti-aircraft guns like this one. I belive he has a treaded breech. Roxtec Multidiameter. Etched brass is kept to a minimum but covers things such as the traversing tracks on the carriage base and the "speed ring" parts of the gun sighting system. Bradley 25mm. [24] Short, Mark I Looks like T91 and T96 were both almost as good as a 20mm Oerlikon. We're going to mount a big 40mm BOFORS cannon aft of this frame. Used on many WWII German warships including Bismarck, Scharnhorst and Graf Spee classes. A Board of Inquiry is under way to determine the cause of the incident. BREECH. The Finnish Army captured 102 of these guns in 1918. 41-E-600: 8 : To lift the breech ring safety plunger (M1 gun only) and to remove the extractor spindle. These guns are recoil operated and use a monobloc barrel with a detachable breech ring, breech casing and automatic loader. The barrel, the breech mechanism and the loading device, the elevation system, are designed to give a continuous high rate of fire. Barrel tech: given by Bofors in 1980s and worked fine. The GMC CCKW 353 equipped with the Bofors 40 mm gun was a French version of the vehicle used almost exclusively by the Free French Army. tripod gun. This SPAA has pretty much no armour due to the fact this thing is pretty much a very large truck with a 40 mm Bofors gun bolted onto it. 8 barrels. The Bofors could fire 130 rounds per minute, and the two pound projectiles had a range of 5,420 yards. The wheels are 10 mm thick. Fig. By 1895 only three emplacements, still there, with 6” breech loading guns. From Wikipedia, the free encyclopedia Ruby Loftus Screwing a Breech-ring is a 1943 painting by the British artist Laura Knight depicting a young woman, Ruby Loftus working at an industrial lathe cutting the screw of a breech-ring for a Bofors anti-aircraft gun. The gun can be rotated 360 degrees and elevated to near vertical. Grayson Perry, The Annunciation of the Virgin Deal, 201 The lever used to open and close the gun's breech mechanism. Since this was a peacetime operation, no shots or artillery were exchanged and both armies relied on the traditional methods of mining, countermining and Compared to M24 Chaffee, the M41 was a much bigger tank, a direct consequence of the main gun’s breech block length. Note 40mm Bofors anti-aircraft guns. 5ボフォース後装式; 2. In late The breech-ring was part of the Bofors gun, and her job was the most highly skilled in the workforce. Filed under Model Ship Building. The Mark XVI had an A tube and jacket from the muzzle and removable breech ring plus down-sliding breech block. It was the same 56cal barrel as the Flak 18/36 and used the same cartridge. The wire to the right-hand balancer is fixed to the breech ring in a trunnion which, during the recoil action, runs in  . The high pressue is created by using a larger propellant charge, which negatively affects weight and size: the weight of 60 mm ammunition is between 6 to 7. German S-100 Class Schnellboot . This weapon was manufactured by Rheinmetal-Borsig and was essentially a longer barrel and improved version over the older 3. 5 vs 9. co. Slightly – the limiting factor with elevation isn’t the back end of the breech (my assumption*) but the elevation at which the mantlet and its recoil shroud bumps into the turret roofplate armour (and of course the end-stops on the elevation drive system and balance spring). This was a Mk III gun with the same modification to the ring and block as for the Mk II/I. The floor of the driver's cabin is 3 mm thick and the floor of the truck bed is 15 mm thick. German 5. Her slender oil-glistened hands rest lightly but firmly on the lathe and demonstrate her skill and authority, while the surrounding callipers, spanners, blocks and other ‘tools of the trade’ confirm her status. The painting Artillery and Military transportation · Caliber · Applications design · Increasing system life · Grade design · Mechanical design · Breech block - Breech ring design · Mortar grade design. The worst stoppage you could get was a round part inside the breech. In mid-1920's Swedish Bofors developed 105-mm howitzer for export sales, Holland acquired 30 of these howitzers to be used in its colonies at East Indies. The pilot of the weapon, named 3 inch gun T10, was ready by September 1941. The HI breech ring was really rusty, it is amazing we got the barrel out given how much sand, rust and crud there was in the interrupted threads. 9in SKC34 barrels. Twelve Armstrong 20-pounder 16-cwt Rifled Breech-loading Gun s were allocated to the defence of Halifax by the British War Office in January 1873. Bofors continued to use this in medium artillery into the 20th century. IWM ART LD 5210 British prisoners of war, Italy 1946, Paul Bullard, IWM ART 16315 A Bofors gun, Algiers, Henry Carr LD A camouflaged runway, Cedric Kennedy, IWM ART LD 2758 Ruby Loftus screwing a breech-ring, Laura Knight RA,&nbs By comparison, Knight's Ruby Loftus is perhaps one of the most iconic pictures of war on the home front. US2984156A * 1957-09-14 1961-05-16 Bofors Ab Recoilless firea The Nordenfelt mechanism consists of a breech block (fig. 820. Worth mentioning is also the official lack of any “stuck case removal” tool. The 20 ton Dragging one of the 6" guns on to temporary mounts - Paga Hill, 1939. Bofors Mk II 40 mm anti-aircraft gun, 1943. Mini Cannon Tech's miniature cannons are the real deal! Our mini cannons are built to fire with real gun powder and mini cannon balls. The breechblock opened mechanically as the gun recoiled and closed automatically as soon as the next round was loaded. On the left are rings for training. wikia. The projectile is fit into the rifling, the cartridge is supported and the base of the case is supported by the outer ring of the Venturi, what could be referred to as a "Breach". Artillery: 1991-11-43: R Gilpin, and regimental name on breech ring; Madras Sepoy Battalions, 1st Mysore War. TEND. These archived works are excellent reference material for researchers,authors,enthusiasts,historians. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II, and many versions are still in use today. I am using I am wanting to build another cannon but I want to use a 40mm BOFORS barrel. the breech casing. Built with a liner, autofretted A tube, two part jacket and breech ring. The Type 92 from Nambu entered service in 1932 and was the standard Japanese heavy machine gun used during World War II. 40mm water cooled Bofors barrels. The Bofors breech screw is a modification. This was considered the most highly skilled job in the factory and normally required eight or nine At twenty-one, and with no previous industrial experience, she had mastered the complex skill of making a breech-ring for the Bofors gun. To keep a gun crew that is target-fixated from blasting an essential part of the boat, let's say the pilot station, you'd need some way to block the barrel from aiming in the wrong direction. 1. 16" 2,700lbs "Super Heavy" AP rounds stowed on the rotating ring of the turret in a shell station. Boiler The Mk 37 Duals were menat to replace quad 40s, and had the same mount ring diameter. PHOTO : Bofors' FH-77B, which features an L139-type barrel, has been one of the world's most successful export examples with well over 400 units sold to India. The painting shows her manufacturing a Bofors Breech ring used in anti-tank anti- aircraft guns. Pattern Chargers, Marks I and II. 97 lbs. The Bofors 40 mm gun, usually referred to simply as the Bofors gun, is a multi-purpose auto-cannon, anti-aircraft weapon, designed in the 1930s by the Swedish arms manufacturer AB Bofors. This had to do with the number of machining operations regarding the breech block and the breech ring. Being a very heavy weapon, the M1 required vehicular transport such as by tractor or truck. The Bofors 40mm gun was first developed in the early 1930s, in response to a Bought two breech rings and blocks semi-blind out of an estate inventory that  This weapon had a monoblock barrel with a drawn-on breech ring and a The Kriegsmarine also imported some 40mm Flak 28 Bofors guns from Sweden. M620A OFFER ITEM British Naval 40mm N2 BOFORS Drill Round (FFE) ME103 NAZI SS Pattern Ring. Loftus sisters with colleague Ethel, 1940s Screwing the breech ring of a Bofors anti-aircraft gun was considered one of the most highly skilled jobs in the factory, a task usually requiring an apprenticeship of eight or nine years. 1 The only way to increase headspace on a Bofors is to significantly wear the barrel or breech face, or somehow manage to stretch the breech ring(!). It includes both the 60 caliber gun of World War II fame and the post war 70 caliber faster firing gun. 3. BDB96002. 03 m vs. Breech door assembly for Mk 18 torpedo tube. 00 mm Total Plastic Parts: 380+ Late in 1940, the Ordnance Corps started another project - an anti-tank gun based on the 3 inch anti-aircraft gun T9. 20mm - 40mm. Mark VI barrel. 1 Description 2 Variants 3 History 4 References The M1 could fire a 155 mm shell at a maximum range of up to 22 kilometers. Gravity feed for Bofors 40mm gun ( BuOrd, VSN) RAPID FIKE. Assault Rifle / Assault Carbine / Designated Marksman Rifle (DMR) Sharps Model 1852 Saddle Ring. 315" Sporting Rifle[70]() Specification : AS PER DRG. TM-9235-37mm AA Gun Materiel Manual 1945. FEED SLIDE OPERATING CAM GROOVE. The information for the two tables below comes from "The History of the Americanization of the Bofors 40mm Automatic Antiaircraft Gun" written by the Historical Section of the Ordnance Department in May 1944. 63 Kg finished product after 625 inspection gauges. breech. 9 vs 9. Buick built 2,952 gun mounts. Lock Chain - used in stopping the wheel from turning. By November 31, when the first bombs rained down on Helsinki, there were only two Bofors guns per regiment. Hunnicutt. The drill in the event of a missfire was to give the round one minute to see if it would go off. "HS" most likely is abbreviated for "Heat-Seeking" and is also how it was able to guide its way to a moving aircraft but can still be counter measured by flares. The reusable combined cartridge holder and ram rear end receiver is removably connected to the tool body. It also prevents the gun being fired automatically when set to SINGLE See full list on military. It is often referred to simply as the Bofors gun. When the gun fires, the spent casing is ejected and as soon as it clears the breech ring it strikes the bottom of the tray, deflecting the casing downwards. First developed in Sweden, the L60 proved a versatile weapon, used by many nations on land, at sea and even in the air. by turning the handle clockwise, a high-helix thread forced the breech block closed. 25 calibers in length. by turning the handle clockwise, a high-helix thread forced the breech block closed. resin gun breech mechanism. The Bren was also replaced by dedicated anti-aircraft guns, including the 20mm Polsten and Oerlikon guns and the 40mm Bofors gun. CARTRIDGE FEED PAWLS. (Photo taken in Tykistömuseo). N. 107 K/77 Field Gun. Ruby Loftus Screwing a Breech-ring Laura Knight 1943 The component being worked is the breech ring of a Bofors anti-aircraft gun designed to fire one  Ammunition—40-m. Ruag’s gun system weighs 2,600kg compared to the 1,901kg of the M256 and the 1,100kg of Rheinmetall’s L/44. Projectiles, Breech And Muzzle Loaded NOTICE: Inert Loaded OALw/ring: 35" 200# #72. Which is a round being ejected without problems. A long tube covered by a conformal housing (which contains a cable used to fire the weapon) runs from the trigger mechanism to the breech along the top of the tube. References: Patton by R. But, by weight they were a 2 for 3 replacment. About 200m southwest of the gun mounts is a Battery Observation Post (BOP) on the hill. L. The vertical type was liked by the crews because the top face of the block could act as a loading tray for the shell, and the block could not jam the trail if the breech was opened at a high elevation. I am wanting to build another cannon but I want to use a 40mm BOFORS barrel. The turret of the M42 was designed to fit the M41’s existing hull turret ring without modification. uk | 12:09pm Friday 21st July 2006 | Arms-race Ruby is back home | By Argus reporter [ICONIC: The painting of Ruby Loftus from the Second World War] ONE of the most famous paintings of the Second World War symbolising the part women factory workers played in Britain's victory returned to Newport after 63 years. GAGE, chambering: 41 One part required 130 different machining operations. Saab Bofors Dynamics M136 AT4 . The M3A1 was rated for use at - 40 degrees F. The 40/70 was a standard gun in production in Italy for decades. The 155mm Gun M1, (Long Tom) , and the M12 Gun Motor Carriages also used the same ammunition. They were made of a tapered inner A tube, with full-length multi-start wire, and a B tube with overlapping jacket and breech ring. Bofors 155 Bonus-Wikipedia. The breech ring was a solid piece with the center removed to allow the block to slide vertically up and down inside it. They are made with premium materials and are designed to look and function just like the real cannons. 2045 required for 0. Troops of US 85th Division on Mount Verruca, Italy, 1944 US 15th Air Force African-American pilot Captain Wendell Pruitt leaving his ring with his crew chief Staff Sergeant Samuel Jacobs before leaving on a mission in his P-51 Mustang fighter, Nov 1944 Finnish use: Bofors howitzer design manufactured under license in Finland. It was usable with the 40mm Bofors, the later 3''/50 AA gun, and the 5''/38, though it was designed for the Bofors and other guns required careful skill to compensate for the different ballistics. 00. Any mistake could make the gun highly dangerous. in the highly skilled task of making a Bofors Breech ring, and in terms of style,  The main goal with modification of the Bofors 40 mm gun was to maintain or improve is mounted on a socket under the slewing ring, and the motor for elevation is For tracking, the gun captain will use a sight attached to a breech ring the attack on Novgorod. With care, all wheels will rotate. Three Fisher Body plants provided tooling to make parts and another three plants provided parts for the big guns. A. 1878/09/31 and wz. These breech loading 6-inch Mk. But most of the recoil energy was absorbed by the gun tackle. 2アームストロング後装式; 2. Cast Iron 24-pounder 13-cwt Smoothbore Muzzleloading Carronade with a Blomefield pattern breeching ring, 12---- (>1,300 lbs) heavily corroded Gun on wood blocks. The breech block locking bolt, when inserted though the left side of the breech ring with the breech open, prevents the breech block being inadvertently closed. ROF breech-blocks of a Bofors anti-aircraft gun ready for inspection, 1940s To remove cartridge case if extractors fail. $25. Loading from the rear of the Bofors Gun 40mm Ordnance Pamphlet No. Considering an historic piece of equipment is involved, this can result in the best possible ending. I belive he has a treaded breech. The multiplayer version incorrectly fires guided rounds, and is referred to as "AT4-HS". A friend The hinge and breach ring don't cary large loads with that conf 11 Feb 2006 The Army had initially planned to acquire 1500 Bofors FH-77B howitzers, but due to the infamous 'Bofors Scandal' only 410 guns were purchased. The Model PT Boat Site. The turret was essentially the same as that used on the M19, retaining the combat proven and highly effective 40mm Bofors guns. 19 Sep 2004 The first of the later world famous 40 mm Bofors L/60 AA guns was delivered to the R Sw Navy in March 1932. The spin imparted by the gun's rifling gives projectiles directional stability and increased range. Ordnance QF 40-mm Bofors AA Gun, being prepared for loading on a Douglas C-47 Dakota, RCAF (Serial No. Her ability to operate the machine presented a considerable publicity coup at the time. Two wheels receive three-part brake drums along with tiny etched brass detail parts, while the two others do not. 9 ft or 5. The gun is matted to an unmanned (the crew is below the turret ring) narrow mantlet turret and a new autoloader which carries eleven rounds. The 40mm T91 was based on the Vickers 2pdr gun with the LV ammo. The Crucible Steel Company was, incidentally, already producing barrel, breech block and breech ring forgings for Otis Fensom in Canada. The picture of Newport armaments worker Ruby Loftus, who lived The Fisher Body Plant in Pontiac, MI built 2,359 90mm anti-aircraft guns like this one. The gun consists in the main of a barrel, breech ring and breech casing frame. 12 Jul 2002 (3) Lekander, Sven; CLEVER Report, Additional Work; Bofors Technical Report XU 5-. , Mark IV, Left and Right—Modification thickness of the packing ring, care being taken to avoid a foul between the bracket. These can be detected by aircraft for various purposes, but The barrel is a forging screwed into the breech mechanism. 15 lbs. They were never used. tripod gun. 6スライディング ブロック  Ruby Loftus Screwing a Breech-ring is a 1943 painting by the British artist Laura Knight depicting a young woman, Ruby Loftus, working at an industrial lathe cutting the screw of a breech-ring for a Bofors anti-aircraft gun. British 40-mm Bofors Automatic Antiaircraft Gun_ _ _ _ _ _ _ ______ _ This howitzer has a monobloc tube with detachable breech ring, horizontal sliding  11 Mar 2021 Other variants of the Bofors 40 mm gun within the game include: Upon firing, the recoil of the gun would open the breech and eject the spent casing out its rear Rounds with tracer were indicated by an additional re Probably the best heavy MG AA weapon of World War II, Bofors guns of this type barrel with a detachable breech ring, breech casing and automatic loader. 22 It should be noted that the compact breech comes at a price of gained weight. o-ring in the liquid injection nozzle that supplies the processing solvent to the extruder faile detector system. There are six 40mm twin Bofors cannon mounts for a total of 24 cannon; the kit cannon are nicely done, but the muzzles are very fragile, Of the 24 guns, I broke off the flash hiders on most of them trying to remove them from the runner. A. 77 vs 2. Autofretted barrel and a breech ring. In spite of sharing almost nothing with the original design other than the calibre and the distinctive conical flash hider, this weapon is also widely known simply as "the Bofors". 4. The length of the barrel, including breech system, was 11. Starting with the tires, these are produced using a slide-molded ring for the tread section, and inner and outer halves for the side-wall/wheel rim. Ammunition was held in clips of four rounds each. This was commissioned in October 1942 to encourage women to come and work in the factories for the war effort at a time when retention of women and absenteeism were issues, owing to inadequate childcare and long hours, and factories were seen as The 40mm Bofors antiaircraft machine gun has had a short but vital history in the U. Her ability to operate the machine presented a considerable publicity coup at the time. Both SAP and AP were painted black with white tips, with AP being distinguished by a white ring painted on the body. - On the choice of which breech ring to restore. The breech block was changed to a vertically sliding type which was more convenient in the turret of a tank than the horizontally opening one of the Flak 18/36. Schreier states the 155mm howitzer typically fired 80% or more HE (high explosive) shells during the war. A proposal from Anglo Engineering Concepts to meet British Army vehicle capability gaps and drive down support costs by adopting system engineering thinking and a design language that places the designer close to the user. I think the Bofors 75mm L12 infantry gun of 1934 was an upgrade of old Thai barrels, maybe fixed to the cradle of the Bofors 75mm mountain gun to give them long recoil (a trademark the Krupp men at Bofors at the time could easily have shared), with a new shield. Mark IV barrel. There are close-ups of the 40mm Bofors' loading mechanism, detailed dimensioned views of the 4. I really like all the angles and curves. May not be faked, but the close up sequence at the Bofors is not the same sequence of rounds that hit near the target across the lake. Bofors signed a contract in late 1928. The Mark IV was identical to the Mark III/I, and featured the modified ring and a paired block from new. NO. The Japanese never redesigned for HV ammo. These guns had their genesis in the Kamikaze attacks of World War II. About 200m southwest of the gun mounts is a Battery Observation Post (BOP) on the hill. Has to withstand same/ greater pressure than barrel. It also shows filmed footage Ruby working at her lathe. A (the first attached image is a Model 1909 gun). 16" AP on shell hoist to be sent to the breech chamber. Component worked the breech on Bofors anti-aircraft gun, designed to fire one-HUNDRED-TWENTY shots per minute. Used in dual and quad mounts on many WWII US and Allied combatants. In both the Armstrong and Krupp guns, obturation—that is, the sealing of the breech against the escape of gas—was performed by a soft metal ring let into the face of the vent piece or wedge. B35-082: 75mm PaK 42 L/48 - Gun Barrel for German Tank Destroyer Jagdpanzer IV (Standard Model) The set consists of a turned barrel and resin parts: mantlet and armour plate. Knight was also commissioned to portray the Nuremberg trials in 1946, and this assignment made her an official war correspondent. 11. The M136 AT4 appears in the game. 7in/45 Mk XIX's shield, a large-scale cross-section through a 2pdr Mk VIII gun, multiple plans and sections through the J-class destroyer's director control tower The inner collar in the receiver ring, and seating the simple flat faced off breech end of the barrel on it removes one of the tolerances for headspacing a new barrel, helps stabilize potential wobble in the threads and it builds case head protrusion into the action, it cannot be messed up without significant effort being invested to mess it up 16" HC shells stowed on the rotating turret ring inside the shell station. a Model 1903 gun). The turret was enlarged, with a turret ring 2 inches (50 cm) wider, imposing a longer hull, (16. When the site was redeveloped in the 21st century, part of the new housing estate was named after Loftus. I am using a sliding breech design. on the upper deck and in the shipborne castles (Barfod 1990:131; Friel 1995:152f. It was the most skilled job in the factory, requiring 8-9 years training. The quick-firing Bofors guns can be relied on to drive away the harassing Axis aircraft before they have a chance to do too much harm. The vertical type was liked by the crews because the top face of the block could act as a loading tray for the shell, and the block could not jam the trail if the breech was opened at a high elevation. The gun was first conceived when the Swedish Navy approached Bofors for a suitable replacement for the British Vickers 2-pounder “pom-pom”. This bofors 40mm l60 anti aircraft gun Bofors anti–aircraft guns have been in Irish Army service since 1939, a number being based on Spike Island during the ‘Emergency’, 1939 to 1946. Refer to TM 9-252. 'It's probably Also in the early 1890s, Arent Silfversparre of Bofors invented an ogival screw breech, similar to the Armstrong model in the way it eliminated the need to withdraw the screw before swinging it to the side. Original Item: Only One Available. May have been a derivative of the Bofors Model 1924C which was manufactured under license by Wilton-Fijenoord. A friend of mine has one that he shoots at the cannon shoot. Chevrolet built 2,000 gun tubes, breech ring and blocks, and recoil rails for the weapon. Tommy's Avatar · Tommy said: 04-07-2017 08:20 PM. ) The Navy approached Bofors about the development of a more capable replacement. While the model offers a steel spring, in this case the barrel is used to trap it under compression to the breech and it does not "work" as with some past kits. Eventually, the belt-fed Besa machine gun was adopted for use on tanks, and the old water-cooled Vickers gun was brought back into use for sustained fire in fixed positions. 23 Aug 2011 Laura Knight's 'Ruby Loftus Screwing a Breech-Ring': a famously captivating image of the Home Front' and concentrated as she screws a breech ring as part of the manufacture of the Bofors gun at a factor 滑腔砲 大砲 とその前の 前装式施条砲 (RML)は、銃身に ライフリング があり、 ブリーチ 銃の後部に。 2. 155 mm Bofors guns are the mainstay of the artillery fire power of Indi 30 Jul 2016 Elevating Screw - used in aiming by raising or lowering the breech. Lunette - large ring at the end of the trail, used in hooking the piece to the limber. m. © I989 Gordon and Breach Science Publishers S. Changes to the breech for this role created the "QF 40 mm Mark VI", which was used on the Crusader to produce the Crusader III AA Mark I. Her ability to operate the machine presented a considerable publicity coup at the time. Externally, the rear end is prepared with interrupted threads to ease rapid assembly in the breech ring. 5 kilograms for a 40 mm Bofors L70 HE round. Founded in 1853 as a train car manufacturing plant in Neuhausen am Rheinfall by Friedrich Peyer, Conrad Neher, and Heinrich Moser, SIG started making small arms in 1860. This design introduced by the Swedish Company of AG Bofors was the answer to one of the problems encountered during the early part of the Second World War& Designed as a naval gun and also seeing service as a coastal gun, this role is revealed by the presence of a breeching ring at the rear of the gun, through which a strong The introduction of breech loaded guns rendered them obsolete . Pointing Ring A back-up sight ring and post, known as the "Pancake", was also provided, This was later used as the primary sight as the Kerrison proved too complicated to use in many situations and required constant fuel supplies for its elec Antiaircraft Gun, 4 cm, Flak 28 (Bofors) 129 a spacer ring, fits into a circular recess in the front face of the breech plate. NO. 16 May 2020 Ruby Loftus screwing a breech - ring Dame Laura Knight RA 1877 - 1970 Canadian War Museum. This one used fuze which projeced from the nipple at the rear of the breech plug. PHOTO : The South African 155 mm G6 self-propelled howitzer, which uses the same ammunition as the G5, can reach a range of nearly 40 000 metres ith ERFB BB rounds. Light Aid Detachment The Bofors 40mm anti-aircraft gun network of ground radar sites, and  The rear or breech contains a gas chamber and is fitted with one or more rearwardly trigger pulls the wire I3 connected at the breech of the gun to the ring mechanism. Source: Curami, Ferrari, and Rastelli Conclusion. Each Bofors gun crew consists of five men: a gun layer seated on the left of the gun who is responsible for traversing the gun onto its target, a gun trainer seated on the right who is in charge of elevating or lowering the gun barrel, the loader busy feeding the breech with Ruby Loftus Screwing a Breech-ring is an oil painting on canvas measuring 86. The total weight of the turret was 256 tons. Bofors produced a gun that was a smaller version of a 57 mm (6-pounder) semi-automatic gun developed as an anti-torpedo boat weapon in the late 19th century by Finspong. The US version was therefore named the Bofors 40mm/56. The barrel was fitted with a hydrospring recoil system. 6pdr gun (BuOrd, USN) Gra vity feed for Mo I ins. 50 mm, Width 75. Navy. S. Cast Iron 24-pounder 13-cwt Smoothbore Muzzleloading Carronade with a Blomefield pattern breeching ring, 12---- (>1,300 lbs) heavily corroded Gun on wood blocks. The rammed cartridge releases the extractors, allowing the breechblock to close under the tension of the breech ring closing spring. 4ウェリン後装式; 2. Gra vity feed for Mo I ins. (Library & Archives Canada Photo, MIKAN No. I am offering this for $7000 (a discount of $1000 off previous Knob Creek pricing). CV90 35mm. Any mistake could make the gun highly dangerous. 40mm Bofors single. The tube, breech ring, and loading tray start to move into battery. G647 Rare Antique 1893 German Krupp 6. Label Making a Bofors Breech ring was considered the most highly skilled job in the factory, normally requiring eight or nine years training. - On the choice of which breech ring to restore. She is making the screw of the breech ring for a Bofors gun, a double-barrelled 40 mm anti-aircraft weapon . The Krupp projectile had a number of soft metal studs set into its surface, positioned so as to align with the rifling grooves. The other consequence of the US haste was a long contractual wrangle with AB Bofors over the unlicensed manufacture, sale and disposal of Bofors guns which was only resolved in 1957. BREECH. S. • Round is fired • the breech recoils • the projectile leaves the barrel 4. EXTRACTOR, spindle and safety plunger, sq body, width of body 3/8 in, lgh overall 7 1/2 in. The force required to accelerate the mass of the breech block is obtained from the pressure in the hydraulic medium contained in the connection 12, 12a. It also saw service in Algeria and Indochina. SAES - Sociedad Anónima de Electrónica Submarina. HE, painted buff, had 0. The picture demonstrates 3. When used as an anti-aircraft gun, the. 71 m). Loftus was aged 21 at the time of the painting and had no previous factory experience. The length of the barrel, including breech system, was 11. The total weight of the turret was 256 tons. Notice the police wearing pith helmets. She was nominated as a subject to the War Artists Advisory Committee, and the image led to Ruby becoming a minor celebrity. Just a few of my nice ones all are 98%+. 10 ft or 3. 99/420 65,000 psi breech pressure. It is one of the largest pictures of the wartime commissions, and the largest of the single-figure portraits they acquired. Royal Ordnance Factory, Newport, Monmouthshire. 7cm FK 96 n. 40mm Cased Telescoped. S. The HI breech ring was The latest and fastest versions of this weapon are still in production from Breda and Bofors (now BAE). Although often listed as being 60 calibers long, all guns from all nations except Japan were actually 56. The longer turret overhang at the front increases the area of Desert Rats Bofors Light AA Troop Information. Warrior 25mm. From original period Anti Aircraft rare WW2 era. On top of the hill about 400m south of the BOP is a three-room former signal station with a generator room nearby. There was a “hopper” just above the breech, and rounds would be dropped into the hopper. Bofors continued to use this in medium artillery into the 20th century. The only sure fire way to know is for someone to actually go to that museum and get the markings from the breech ring or barrel to end the debate. Welin stepped interrupted screw breech Also in the early 1890s, Arent Silfversparre of Bofors invented an ogival screw breech, similar to the Armstrong model in the way it eliminated the need to withdraw the screw before swinging it to the side. “There were two accidents in May and July during user exploitation trials. The design of this gun emphasized ease Finnish use: Bofors howitzer design manufactured under license in Finland. 2 kilograms, depending on ammo type; this compares to 750-860 grams for a single 30 x 173 mm round and ~2. 56mm rifle ammo as well as the complete range of 40mm special purpose ammo A long breech block might force the mantlet axis to be further forward just to make room for the Gunner & Commander, but this would lead to a larger turret ring to allow the breech block adequate clearance at full gun elevation, which makes the turret footprint larger on the hull. Maybe Pre 68 amnesty registered breach ring. One of her 6 boilers. On the standard Sherman tank, there was a single hatch in the turret through which the tank commander, gunner and loader entered and left the tank. The 15th 113 ON WAR ON BOARD century, however, witnessed a dramatic increase in the appreciation for gun- powder weapons at sea, these chiefly being comprised of light ordnance, small bombards and breech-loading swivel guns which were carried high in the hull, i. The breech rope did provide the final stop for recoil. In 1924 the guns from the decommissioned HMCS Rainbow we’re mounted. Bofors continued to use this in medium artillery into the 20th century. 9 tons. The M1 Field Gun, also known as the M1 "Long Tom", was a field gun that was used by the United States during World War II. T35007 BY Ray Mehlberger Copyright: 1990’s Out of production A rifled breech loader (RBL) is an artillery piece which, unlike the smoothbore cannon and rifled muzzle loader (RML) which preceded it, has rifling in the barrel and is loaded from the breech at the rear of the gun. 25 calibers in length. Kilbourn had to deal with other problems. CVR(T) 30mm. It was one of the most popular medium-weight anti-aircraft systems during World War II, used by most of the western Allies as well as various other forces. K-1302 WITH FIRMS MATERIAL: C: Nonestab We have an extra equilibrator rod from the other mount (in mediocre condition), but we do no have an extra nut (only one of the donor guns had springs. When the breechblock closes, a striking pin, The heavy guns ready for inspection at Bofors factories. 315" Sporting Rifle: C: Nonestab: 10) SUPPLY OF STUD AS PER DRG NO. ; 1943 F-60S LAAT and 1939 Bofors 1942 C8 Wireless 1943 FAT/ 17 pounder Just a couple of pics. The Breech block of this gun seems to be missing. Artillery Stores. He also Seems to be a fully functional Bofors. In the older types of mechanism for heavy B. nuyt Post Jun 23, 2008 #10 2008-06-23T17:24 Apparently built with a loose barrel, jacket and removable breech ring and had a vertical sliding breech-block. The force required to accelerate the mass of the breech block is obtained from the pressure in the hydraulic medium contained in the connection 12, 12a. Carl Wilson 4: 14/02/2014 18:31:26: 671 forum posts 53 photos: Look at this:-**LINK** It is fascinating, Ruby Loftus and Laura Knight (with fag in mouth!) at the unveiling of the painting of the former by the latter. 75 m, diameter at the breech over one meter and weight 37. As one of the most popular medium-weight anti-aircraft systems used during World War II, the gun was deployed by most of the western Allies as well as by the A proposal from Anglo Engineering Concepts to meet British Army vehicle capability gaps and drive down support costs by adopting system engineering thinking and a design language that places the designer close to the user. Note the sliding block mechanism on the rear of this cannon. The breech ring was a solid piece with the center removed to allow the block to slide vertically up and down inside it. Functioning of the Puteaux 37-mm aircraft cannon is as follows: As the barrel and bolt recoil, a cam turns the lugs allowing the bolt to be freed and to drop until it strikes the base of bofors 40mm l60 anti aircraft gun Bofors anti–aircraft guns have been in Irish Army service since 1939, a number being based on Spike Island during the ‘Emergency’, 1939 to 1946. Scrap rates ended up being less than 2%, lower than in ordinary manufacturing of the time. There was never any serial production of this Breda Upgrade option for the M42. ) Ship happens. of Reggio Emilia, Italy. Their diameter is little over six meters. breech is closed by an interrupted breech screw; the screw is either supported in a carrier ring or tray hinged near the breech opening, The Bofors breech screw is a modifi 13 Jul 2016 It's a 40mm bofors round machined from… is to significantly wear the barrel or breech face, or somehow manage to stretch the breech ring(!). 5 Jan 2015 I am building a breech loading 50 cal. 653), 27 Oct 1943. And, in a hurr-hurr moment, I quoted the 10 man needed for "automatic" (director controlled) operations, and not the full-up 16 for manual (local control) firing. Photo: Bofors Defence AB Alternatively, contacts can be placed on the breech face of a gun to interface with contacts on the base of a round, but that requires re-engineering the entire round to send data through the entire round to the fuze in the nose. engineering process of preparing the breech ring component of a Bofors breech gun- an antiaircraft/multi-purpose autocanno The wire of the left-hand balancing gear is fastened to the breech casing and is thus a pure elevation balancer. breech revolves thru 90° to align with barrel 3. A painting that comes with the epitaph that Ruby had mastered in a very short time the ability to make a breech ring for a Bofors gun that would normally take up to nine years training. It be noted that it has a Bofors L/60 gun meaning it only has a fire rate of 120 rpm compared to the AMX-13 DCA 40's Bofors L/70 gun with 240 rpm. The front and rear sights are located on the forward upper right side of the tube, underneath rectangular protective covers which can be slid-away when the sights needs to be raised. The 40mm that is on the wreck is also of interest, as it is a Mark 1 open base ring mount (a twin mounting), instead of the Mark 2 mounts that are The breech ring of the M3A2 had improved metallurgical properties permitting it to be retubed five times and it was safe for use to - 65 degrees Fahrenheit. Photocopying permitted by  4 Jul 2017 RECIEVER BREECH RING AND BLOCK COMPLETE GUN BOOKS DOCUMENTS DRAWINGS ANYTHING 40MM BOFORS cheers, dave 021 424 709. The primers were placed in the breech of the gun for firing. First developed in Sweden, the L60 proved a versatile weapon, used by many nations on land, at sea and even in the air. Finnish field artillery used them during late Continuation War. All other parts are included, even the breech block. Troops of US 85th Division on Mount Verruca, Italy, 1944 US 15th Air Force African-American pilot Captain Wendell Pruitt leaving his ring with his crew chief Staff Sergeant Samuel Jacobs before leaving on a mission in his P-51 Mustang fighter, Nov 1944 Making a Bofors Breech ring was considered the most highly skilled job in the factory, normally requiring eight or nine years training. Both land and naval versions of the Bofors were used during the Second World War and after. The Bofors 40 mm gun, usually referred to simply as the Bofors gun, is a multi-purpose auto-cannon, anti-aircraft weapon, designed in the 1930s by the Swedish arms manufacturer AB Bofors. The firm developed automatic guns in caliber ranging from 20mm to 57mm, but the 40mm because a tremendous commercial success. The ships CIC (combat information center) still with her original electrical equipment. On top of the hill about 400m south of the BOP is a three-room former signal station with a generator room nearby. 1初期後装式; 2. The British Army placed an order for 100 in 1937. Flexible Cable and Pipe Transits. And if that didn't happen, the top cover plate had to be opened and the round forced backwards and out of the breech with the aid of a crowbar. STAR WHEEL LATCH. This means that Wargaming would have to implement new aiming system for this sort of tank – and Wargaming does not want to do that for one separate tank, but they have stated this: We get exploded views of the 4. The piece could also fire smoke or white phosphorus shells as well. They were recoil operated with a monobloc barrel and detachable breech ring, breech casing and automatic loader with a vertical sliding breech block. I am building a breech loading 50 cal. 7in QF Mk IX's breech block contact and trigger sear case. rounds the piece just forward of the breech ring; a cylindrical. A RICH counter. Previously, this delicate operation was thought impossible for a woman to do. Notice the very simple structure and that the muzzle of gun barrel has no bulge ring, unlike in French guns of the same era. First Installations afloat were made In the early summer of 1942. The gun's loading arrangement seemed almost made for multiple mounts, which was exactly what our people had in mind. Other factory workers are visible in the background. Loktev and M. Thorough history of the development of the famous 40 mm Bofors anti-aircraft gun. STAR WHEEL LATCH. Finnish field artillery used them during late Continuation War. Unless someone made new rings, I would guess all of the transferable guns are pre  It depicted a female worker screwing the breech ring on a Bofors 40mm light anti- aircraft gun at No. By Robert Bruce The 40mm M2 Dual Automatic Gun is a truly awesome weapon when its twin machine cannons are pumping out 2-pound high-explosive tracer projectiles at the rate of four rounds each second to a maximum range in excess of 10,000 yards! The heavy guns ready for inspection at Bofors factories. The ring of Forts was put to the test on the 1st July 1907 when 2500 officers and men (the blue army) attacked a much smaller force of 1000 defenders (the red army) to take the dockyard. On the left are rings for training. Twelve Armstrong 20-pounder 16-cwt Rifled Breech-loading Gun s were allocated to the defence of Halifax by the British War Office in January 1873. If you have ever used multiple block tackle to hoist an object and then let the loose end go you will have seen that the tackle slows the fall. They used the proven Welin breech, operated by an hydraulic “pure-coupled” mechanism. April 10, 2016 · 8:25 AM 40mm Bofors Mount Now Dragging one of the 6" guns on to temporary mounts - Paga Hill, 1939. Navy. After the breechblock is fully closed, the firing pin is automatically released to fire the piece. This features a later version of the Sharps action with an improved gas seal and vertical breech. S. Use enough gun. 3 フランスの努力; 2. 9 tons. breech 5. Also in the early 1890s, Arent Silfversparre of Bofors invented an ogival screw breech, similar to the Armstrong model in the way it eliminated the need to withdraw the screw before swinging it to the side The Canon de 130 mm Modèle 1932 and 1935 were medium-caliber naval guns used as the primary armament on a number of French Navy destroyers and as dual-purpose secondary armament on battleships during World War II. Open the breech from a safe distance, and making sure the round will be caught before it hits something. The advantages of the M1 though were that it was very The breech consisted of a sliding block with a rotary motion in the breech housing that not only locked and unlocked but likewise operated in an open position. Notice the police wearing pith helmets. The open desert offers precious little cover from the Stuka dive-bombers of the Luftwaffe. The set consists of 12 projectiles (six of each type) and 12 shells. The gun was semi-automatic and used eight round clips of High Explosive and Tracer ammunition. It depicts the machinist Loftus engaged in the highly skilled task of making a Bofors Breech ring, and in terms of style, conform On the Bofors, it is the ring, for whatever reason. 3 calibers long. Celebrate the work of the st 21 May 2018 Her most famous painting is the rather inelegantly titled “Ruby Loftus Screwing a Breech Ring”. Here is a picture of my heavy barrel sako's and a rare bofors stamped 300 win mag mannlicher and a 264 mag deluxe with original Luminar 6x scope. 4. The barrel is a monobloc piece of forged nickel steel. The design was a joint task by L. The lack of gun depression does worry me but it should offer better protection than the GMC bofors currently at 3. The gun needed a different breech for the HV ammo, it wasn’t interchangeable. Author's photo. 9 centimetres (2. southwalesargus. The photo shows one of the guns on skids and rollers with Gemo Island in the background. I got my insperation from and artical in the HSM/WSM magizine. The breech block was a vertical sliding type which was developed from the Finspong (Swedish arms manufacturer of the 1800s) 57mm Ssk M/89B. Mine has about 20 ft of recoil so you see how nice it is to have it This caliber was developed from the Swedish 25mm Bofors AA gun sold to Russia in the 1930s. The Bofors 40 mm gun, often referred to simply as the Bofors gun,[4] is an anti-aircraft autocannon designed in the 1930s by the Swedish arms manufacturer AB Bofors. Empty case is pushed out by the next round 2. Date: 18 May 2009, 14:39: Source This allowed the block to be unscrewed and swung out in two motions – the "two motion interrupted screw" breech. 175G TNT M437 Shell marked: 175MM-M437- NOR-1970 LOT 1-5 As used with the M107 A long breech block might force the mantlet axis to be further forward just to make room for the Gunner & Commander, but this would lead to a larger turret ring to allow the breech block adequate clearance at full gun elevation, which makes the turret footprint larger on the hull. The Dhanush is an upgraded version of the Swedish 155-mm Bofors howitzers, which India procured in the mid-1980s, based on its original designs. They also came equipped with gyro-stabilization to compensate for The gun closest to camera is a Model 1905 or later - the breech is similar to the 7. The first gun has reflector sights, the second normal ring sights. When the projectile is fired, the propellant gases breech ring; and a box-type trail terminating in . The barrel of the T9 was combined with breech, recoil system and carriage, all adapted from the 105 mm howitzer M2. During the very last stretch of the ramming path the breech block 8 will be released from the impact ring 4 and consequently the breech block 8 will be accelerated towards its closing position. 140 manufactured and delivered to Army 1943 - 1945. The cartridge base has a plastic blowout that moves the properly metered gases out to the rear, through the Venturi cone. interesting:Dame Laura Knight's Ruby Loftus Screwing a Breech Ring (Fig. Overall a good suggestion. Capable of firing 120 40mm shells per minute, it was normally manned by a four man crew. 2 vs 3 m), but slightly lower (8. m. In those locations where the Finns enjoyed Bofors-gun support, the Swedish cannon immediately proved its worth. Making a Bofors Breech ring was considered the most highly skilled job in the factory, normally requiring eight or nine years training. But for all the Bofors' simplicity and power, another feature must have had the early BUORD observers licking their chops. The breech ring and block were designed to withstand the violent rearward caused by the propellant gas pressure when the gun fired. Unlike other autocannons, which were magazine or box-fed, the Bofors had a unique open feed system. Bore has clear lands and grooves, with a partly The sturdy, healthy, almost glowing attractiveness of Ruby Loftus, her reddish curls partly tamed by a green hair net, her face punctuated by bright-red lipstick characteristic of the 1940s, her blue overall neatly complementing her red shirt, and her expression intense and concentrated as she screws a breech ring as part of the manufacture of the Bofors gun at a factory in Newport, is a Formed in the breech ring 4, forward of the breech recess 3 and on that side of the gun I to which the breech block moves on opening, is a substantially quadrantal, concave cylindrical track 7 whose axis intersects the path of the breech lock 2 and is perpendicular to both the gun axis and the line of action of the breech block. Item No: 82459 Item Name: GMC Bofors 40mm Gun Scale: 1:35 Item Type: Static kit Model Dimension: Length 219. The concrete example is the production at Bofors Aerotronics AB RICH is an acronym for Ring Imag— ing CHerenkov counter. —Bofors—U. ). Her most celebrated wartime piece, Ruby Loftus Screwing a Breech Ring in a Bofors Gun (1943), shows a munitions worker performing what was thought to be an impossibly delicate operation for a woman. This one used fuze which projeced from the nipple at the rear of the breech plug. Loftus was aged 21 at the time of the painting and had no previous factory experience. The breech-ring was part of the Bofors gun, and her job was the most highly skilled in the workforce. 9) HEAD BREECH BOLT TO DRG. There were are a number of weapons aboard the S100 boats, of which the largest gun was the 37mm Flak Cannon, (anything above 20mm is a cannon), and later in the war many were replaced by 40mm Bofors cannons. This weapon relatively to the infantry rifle; while both became breech infantry did arrive, but its two Bofors and two 2-pounders. The longer turret overhang at the front increases the area of Another typical Bofors feature, though I have never seen them so small. The The Strv 103 has a hydraulic suspension, which means in practice that the whole hull moves to aim the gun. Rotating Union and Electrical Slip Ring Manufacturer. The photo shows one of the guns on skids and rollers with Gemo Island in the background. The British version is officially listed as 56. Navy Dept 1943. 11 Royal Ordnance Factory, Newport, Monmouthshire. All cannons at the event used black powder and were fired with a bit of cherry bomb fuze or with a flintlock mechanism. Her most celebrated wartime piece, Ruby Loftus Screwing a Breech Ring in a Bofors Gun (1943), shows a munitions worker performing what was thought to be an impossibly delicate operation for a woman. Instead, they convinced themselves that the Type 96 was an excellent weapon, and they relied on it to the end of the war. 1 ft or 2. 9 m), wider (10. Posted 1/2/16 4:34 PM, 13 messages The task group for the 20 December 1942 drill was arrayed in a circular formation with Honolulu ahead of Columbia by 800 yards, Helena abeam of Columbia, Louisville abeam of Honolulu by 2,500 yards, and a screen of five destroyers in a ring farther out. 186 of these guns were manufactured in all, mostly by Vickers, plus 58 turrets until 1918. callibers from bottom to top 222 rem bofors barrel 222 rem mag bofors barrel 223 rem bofors barrel 22-250 rem bofors barrel Interesting set of 3 Ring Krupp tubes by Kilby on F. 140 manufactured and delivered to Army 1943 - 1945. I am wanting to build another cannon but I want to use a 40mm BOFORS barrel. Looking for breech bits that would have been attached onto breech ring The breech-ring took 140 operations to turn a 120. However the 17-pounder's larger breech and recoil system significantly reduced the ability of the loader to quickly exit from the tank if it was hit. As one of the most popular medium-weight anti-aircraft systems used during World War II, the gun was deployed by most of the western Allies as well as by the Optimization of the elevating mass balance of the anti-aircraft gun BOFORS 40 mm L/70 to the right-hand balancer is fixed to the breech ring runs in a groove in . It depicted a female worker screwing the breech ring on a Bofors 40mm light anti-aircraft gun at No. I am building a breech loading 50 cal. ) h. 2 Comments. SIG: Schweizerische Industrie-Gesellschaft The SIG P210 pistol was created in 1947 by Schweizerische Industrie-Gesellschaft, also known by the acronym SIG. 28 Jan 2014 Iconic image: Ruby Loftus Screwing the Breech Ring by Dame Laura the Breech Ring, showing a former shop assistant working on a Bofors  to work for the Swedish firm Bofors. The work features a munitions worker named Ruby Loftus working on a Bofors breech, used in the creation of anti-tank and anti-aircraft guns. 52 caliber, serial number C1664. Her most famous painting is the rather inelegantly titled “Ruby Loftus Screwing a Breech Ring”. The main self-propelled version of the Bofors used the gun set on the chassis of a Morris Commercial four-wheel drive lorry. 83 ft × 3. Breech Ring and Barrel are not included. Note the sliding block mechanism on the rear of this cannon. Since that date, Bofors guns have been placed on virtually all combatant ships and on most non-combatant vessels large enough to support the weight of a 40mm assembly. These breech loading 6-inch Mk. org Physical Description The gun consists in the main of a barrel, breech ring and breech casing frame. 90mm Gun T15E2. Bofors-armed patrol boat This photograph shows a single 40mm Bofors on a Danish patrol boat. 16 Jul 2014 The painting shows Loftus creating a Bofors Breech ring, one of the most skilled jobs in the factory. Dame Laura’s rebel status is confirmed by ‘Self Portrait’ painted in 1913. Saab Bofors AB Original Assignee Saab Bofors AB Priority date (The priority date is an assumption and is not a legal conclusion. I am using a sliding breech design. (Breech is attached to barrel, and shell is loaded here. This meant that the motions were reduced to unlocking, withdrawal and then swinging out of the way. Bofors QF 40mm Mk1 QF 40mm Mk1 (Matthew Moss) At the centre of the military vehicle collection was a QF 40mm Mk1, better known as a Bofors. XI coastal defence guns were built in about 1910 as a piece of the original HMAS Sydney's armament. 25mm/60 T-96 : 194 kilojoules/barrel/second 40mm/62 T-91 : 187 kilojoules/barrel/second The new Main Gun required additional modifications, which were sold with the Mk IVA3 as a package: fume Extractor, a muzzle brake and breech ring accessories; changes to the two six-round ammunition drums, the turret basket ammunition racks and the existing automatic loading system. 5cm Rifled Breech-Loading There is a Bofors gun still on the island and it is seated on one of six concrete mounts that may have been constructed for that purpose (see earlier picture). 2KG steel Billet into a 47. The final alteration of the breech ring made in 1964. The breechblock moves slightly upward under the action of the closing spring until it is brought to a stop and held by the extractor heads engaging the notches in the tops of the breechblock projections. And although Ruby is said to be cutting threads on the breech ring of a Bofors gun, these threads were not for the breech mechanism itself but for screwing the breech ring onto the barrel. 40 shows the breech ring and a vertical sliding block breech mechanism. The Bofors 40 mm gun, usually referred to simply as the Bofors gun, is a multi-purpose auto-cannon, anti-aircraft weapon, designed in the 1930s by the Swedish arms manufacturer AB Bofors. In mid-1920's Swedish Bofors developed 105-mm howitzer for export sales, Holland acquired 30 of these howitzers to be used in its colonies at East Indies. The painting was commissioned by the War Artists' Advisory 1943 F-60S LAAT and 1939 Bofors 1942 C8 Wireless 1943 FAT/ 17 pounder Just a couple of pics. As one of the most popular medium-weight anti-aircraft systems used during World War II, the gun was deployed by most of the western Allies as well as by the Ruby Loftus Screwing a Breech-ring (2,848 words) exact match in snippet view article find links to article working at an industrial lathe cutting the screw of a breech-ring for a Bofors anti-aircraft gun. Bofors ogival screw. 3 by 101. Breech, Single-Motion - See "Breech Mechanism, Smith-Asbury" below. Chevrolet built 2,000 gun tubes, breech ring and blocks, and recoil rails for the weapon. The &nbs The 40mm Bofors antiaircraft machine gun has had a short but vital history in the U. Matska #177. the colt m203 grenade launcher mounted on the respective m16/ar15 is a lightweight, single-shot, breech loaded 40mm firearm, creating a versatile combination weapon system capable of firing both 5. The SBoot 37mm Flak Cannon . The 40mm AA mount, a product of the Swedish Bofors company, was an efficient close-in air defense weapon during WWII. The turret could traverse 360 degrees either by its hydraulic power system or manually. Guns and Breech Mechanisms—40-m. A friend of mine has one that he shoots at the cannon shoot. These were the first German light anti-aircraft guns to have shields, a surprising shortcoming of earlier weapons. 3583068) Ordnance QF 40-mm Bofors AA Gunners with 4 LAA Regiment watching a burning German ammunition dump, Zuthphen, Netherlands, 7 Apr 1945. Additional support is provided to the breech end of the gun barrel by the finned cooling jacket. All cannons at the event used black powder and were fired with a bit of cherry bomb fuze or with a flintlock mechanism. It had never been plated. The whole task group engaged in the drill while making rapid course changes between 10° and The Oerlikon 20 mm cannon is a series of autocannons, based on an original German Becker Type M2 20 mm cannon design that appeared very early in World War I. Refer to TM 9-251 or TM 9-252. The breech block was a vertical sliding type which was developed from the Finspong (Swedish arms manufacturer of the 1800s) 57mm Ssk M/89B. However, the top of the breech ring barrel abutment was cut away. 1943 F-60S LAAT and 1939 Bofors 1942 C8 Wireless 1943 FAT/ 17 pounder Framed the breech ring with massive 10 inch "I" beams and one inch threaded rods. Sitting on the left of the gun is the gun trainer with his open sight and to the right is the gun layer, each following the target with manual hand cranks. In spite of the many different Mark numbers, all Bofors guns used by the Royal Navy were basically similar. A total of 22 packages had been produced for export. Nearby is a shallow gun pit for a 40mm Bofors anti-aircraft gun, its stone rubble walls lined on the inside with corrugated concrete. The barrel is changeable, requiring two men and special tools; the operation took a trained crew approximately five minutes. Her most famous painting is ‘Ruby Loftus Screwing a Breech Ring’. 6pdr gun (BuOrd, USN) Rear view of Bofors 40nun 101-round magazine (Courtesy The breech assembly includes a striker, a breech pad and a firing pin. Also portable when picking up a kit with it, deploying it to fire. Has a nice aged patina on most the metal components, with some past pitting. Knight's painting was praised for its technical accuracy. Loftus, 21 at the time of the painting, mastered the  Antiaircraft Gun, 4 cm, Flak 28 (Bofors) 129 are fastened to the lower end of the breech ring. The LA breech ring was still 85% plated. To remove breech ring crank assy. The breech end of the barrel was screwed into a breech ring. tripod gun. Knight was also commissioned to portray the Nuremberg trials in 1946, and this assignment made her an official war correspondent. P. Some 2,555 Mark XVI and XVI* guns and 238 Mark XXI were manufactured while Canada made 504 Mark XVI* and 135 Mark XXI guns and Australia 45 Mark XVI An improved gun barrel is disclosed in which the breech chamber has a length (B) and diameter (D 2) which are chosen relative to the axial spacing (a) between a forward guiding ring (8) and a rearward driving band (6) of the ammunition unit to be fired from the barrel and relative to the diameters (d 1 and d 2) of the guiding ring and driving band, so that the longitudinal axis of the The breech block was a vertical sliding type. Thus, parts replacement cures that problem quickly. Each of the twin 40mm's fired 160 rounds per minute per barrel, with an approximate effective range of 4,000 yards. Nearby is a shallow gun pit for a 40mm Bofors anti-aircraft gun, its stone rubble walls lined on the inside with corrugated concrete. I believe the breech-ring in question is for a Bofors gun. After the attack on Pearl Harbour in 1942 12 40mm Bofors anti-aircraft guns were placed at and nearby the Fort. O. The gun was first developed in 1933 but it was the Model 1936 that was adopted for production. Warrior 30mm. or mobile part; arnd,' depending on the type of 1-7(B)) but in a strict sense the threads are breech, other supporting members that gu F41A3/74 Obturating or packing devices for gas leak prevention in breech mechanisms This invention relates to obturators and obturator pads and rings for ordnance and the like where an effective seal is required to withstand the heat A young factory worker in blue overalls is shown at work on a industrial lathe, cutting and turning the breech-ring component of a Bofors anti-aircraft gun. SAP, AP, and HE rounds were produced for the British Bofors guns, each weighing 0. I wonder how Sauer was involved and if that serial number sequence is Kilby's: Even though the area forward of the flats differs, there looks to be a similar brace of stamps on the tubes. Enough for four dual or two quad mounts. She was nominated as a subject to the War Artists Advisory Committee, and the image led to Ruby becoming a minor celebrity. Note 40mm Bofors anti-aircraft guns. TEND. At twenty-one, and with no previous industrial experience, she had mastered the complex skill of making a breech-ring for the Bofors gun. Their diameter is little over six meters. The gun that is installed is a post-war a relic and there is some dispute as to whether there were anti-aircraft guns on the island at all - a recently installed notice says there were six. Loginov in the Design Bureau of Artillery Plant No. 894 kg (1. 1/96 th scale USN and Allied WWII era warships. This is an excellent stunning example of an original New Model 1863 Military Vertical Breech Carbine in . 9 Apr 2009 CV90 40mm (Bofors). The Type 92 HMG in FHSW is found in pillboxes and other fortified locations of the japanese. The breech itself was modernized as well and fit to newer primers. For this reason, Bofors has developed more sophisticated ammunition such Remove the breech ring (TM 9-251 or TM 9- 252. K-1302 WITH FIRMS MATERIAL[70]() Specification : AS PER DRG NO. The guns were manned by seven men with ammunition passers added to the crew as required. The book is almost paralyzing in the level of detail provided and the subjects covered: breech and ammunition feeding mechanism, ammunition types, targeting and Duster's Last Stand: The M42 Anti Aircraft Weapon System’s Final Days. 5. Three Fisher Body plants provided tooling to make parts and another three plants provided parts for the big guns. Bofors 40/70 guns outside the manufacturing plant of Reggiane Co. Wikipedia Projectiles, Breech And Muzzle Loaded NOTICE: Inert Loaded OALw/ring: 35" 200# #72. The barrel was attached to the breech ring via an interrupted screw design. The loader stood beside the breech and simply dropped a four-round clip into a loading chute. A35-022: 37mm FlaK 37/43 - German 37mm anti-aircraft Ammo. It may have a scope. Worked both on QF and Semi-Automatic mode, with different breech mechanism settings. This is the complete populated casing. Buick built 2,952 gun mounts. ) 1975-09-12 Filing date 1976-09-10 Publication date 1978-06-06 The Bofors 40mm gun was first developed in the early 1930s, in response to a 1928 request by the Swedish Navy for a ship-mounted anti-aircraft weapon. Flak 18 was capable of firing 20 concentric rings of electric light bulbs. Breech tech: Bofors tech given in 1980s was not good, so final good working solution was obtained from Soltam around 2007 during the 180 guns ToT. Loftus was aged 21 at the time of the painting and had no previous factory experience. The Elswick conical screw breech is very similar in concept. The rammer then moves forward, pushing the tray down and pushes the next round, in position on top of the tray, into the breech. bofors breech ring