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The Ordnance quick-firing 6-pounder 7 cwt, [note 1] or just 6-pounder, was a British 57 mm gun, serving during the Second World War as a primary anti-tank gun of both the British and United States Army (as the 57 mm gun M1).
The spherical case shot weighed 5.7 lb (2.6 kg) and released 41 musket balls when it burst. The canister round weighed 7.32 lb (3.3 kg) and contained 27 iron balls. [ 17 ] At 5° elevation, the gun could hurl the round shot a distance of 1,523 yd (1,392.6 m) with the standard firing charge of 1.25 lb (0.6 kg).
6-pounder gun or 6-pdr, usually denotes a 57-millimetre (2.2 in) gun firing a projectile weighing approximately 6 pounds (2.7 kg).. Guns of this type include: QF 6 pounder Hotchkiss, a 57 mm naval gun of the 1880s; a similar weapon was designed by Driggs-Schroeder for the US Navy
4,000 yards (3,700 m) [4] The Ordnance QF Hotchkiss 6 pounder gun Mk I and Mk II or QF 6 pounder 8 cwt were a family of long-lived light 57 mm naval guns introduced in 1885 to defend against new, small and fast vessels such as torpedo boats and later submarines .
The six-pounder's tube was 53 in (135 cm) long, weighed 725 pounds (329 kg) and had an effective range (at 35°) of 7,000 yards (6,400 m), with a standard powder charge of 0.75 pounds (0.34 kg) and 6 lb. (2.72 kg) Hotchkiss bolt-type projectiles.
Established at 130 lb (59 kg) in 1920 by Walker Law; recognized in 1959 Super Bantamweight: 118–122 lb (53.5 - 55.3 kg) Established at 122 lb (55.3 kg) in 1920 by Walker Law; recognized in 1976 Super Flyweight: 112–115 lb (50.8 - 52.2 kg) Established at 115 lb (52.2 kg) in 1920 by Walker Law; recognized in 1980 Light Flyweight
The designation for a specific motor looks like C6-3.In this example, the letter (C) represents the total impulse range of the motor, the number (6) before the dash represents the average thrust in newtons, and the number (3) after the dash represents the delay in seconds from propelling charge burnout to the firing of the ejection charge (a gas generator composition, usually black powder ...
The LB-6/LB-7 was the first operational service model of a 13,000 lb (5,897 kg) twin-tail biplane bomber of a series produced by Keystone. 35 served operationally between 1929 and 1934. A number of variants were built for test and evaluation purposes but never placed into production or service.