From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Graph plotting weight against muzzle velocity and rate of fire for an alternative gun installation on a Spitfire aircraft.
| Identifier | ExFiles\Box 176\1\ img032 | |
| Date | 17th July 1940 guessed | |
| Title: ALTERNATIVE GUN INSTALLATION FOR SPITFIRE AIRCRAFT. (Based on Weight of existing 8 - .303 Browning Guns + 300 Rounds per gun). X-Axis Top: Muzzle Velocity - Feet per sec X-Axis Bottom: Rate of Fire - Rounds per min. Y-Axis: Weight in Pounds. Graph Lines: Muzzle Velocity, Rate of Fire, Gun Weight, Cartridge Weight, Bullet Weight. X-Axis Values (Muzzle Velocity): 3000, 2800, 2600, 2400, 2200, 2000, 1800, 1600. X-Axis Values (Rate of Fire): 1500, 1400, 1200, 1000, 800, 600, 400, 200. Y-Axis Values: 2.0, 800, 700, 150, 600, 500, 1.00, 400, 300, 50, 200, 100. | ||