they both fired 2 lb (0.91 kg), 40 mm (1.6 in) projectiles. The first gun to be called a pom-pom was the 37 mm Nordenfelt-Maxim or "QF 1-pounder" introduced...

The Ordnance QF 2-pounder (QF denoting "quick firing"), or simply "2 pounder gun", was a 40 mm (1.575 in) British anti-tank gun and vehicle-mounted gun...

each shell should be individually aimed. During the 1920s, Vickers developed the Vickers range clock (Predictor No 1), an electro-mechanical computer...

manufactured by the Elswick Ordnance Company, part of Armstrong Whitworth. They were developed to exploit the new "QF" technology, which involved loading the propellant...

recommend the production of trial equipments from ordnance factories, Armstrong, Vickers and the Coventry Ordnance Works (a joint venture by several Coventry...

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...

The QF 6-inch 40 calibre naval gun (Quick-Firing) was used by many United Kingdom-built warships around the end of the 19th century and the start of the...

The Vickers 40 mm Class S gun, also known simply as the Vickers S or S gun, was a 40 mm (1.57 in) airborne autocannon designed by Vickers-Armstrongs for...

different companies manufactured the guns and component parts in the UK. Vickers-Armstrongs in Scotswood, Baker Perkins in Peterborough and Weirs in Glasgow were...

agreed to collaborate to produce a composite design. This used the Armstrong gun, Vickers' recoil system, and Royal Ordnance Factory's sighting and elevating...