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).
Appendix listing the approximate weights of various gun mountings and ammunition components.
| Identifier | ExFiles\Box 175\3\ img006 | |
| Date | 27th August 1940 | |
| Appendix of Approximate Weights. Ev.{Ivan Evernden - coachwork}6/JW.27.8.40. Gun with aluminium cradle - single shot 320 lbs. Gun with Naval Bronze cradle - single shot 480 lbs. Oerlikon Mounting 3SLa 10½ cwt. Non elevating Mounting 360 lbs. Wgt. of single round 2.860 lbs. Wgt. of 30 rounds in regulation box 130.5 lbs. Wgt. of ammunition tray - 18 lbs. | ||