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).
The installation of a .5 Bore Machine Gun Type A.A. and ammunition system in a Spitfire.
| Identifier | ExFiles\Box 176\1\ img152 | |
| Date | 27th March 1941 | |
| To EV{Ivan Evernden - coachwork}/JD.{J. Draper - Frames} c. to Rm.{William Robotham - Chief Engineer} SECRET. Ev.{Ivan Evernden - coachwork}2/JH.27.3.41. re .5 Bore Machine Gun Type A.A. in Spitfire. We have received from Ve/NP. the attached print of QS.232 which shows their method of attaching the swin neck of the ammunition box to the cheeks of the .5 bore gun which you are installing in a Spitfire. This should enable you to complete the design of the ammunition box and its attachments. A chute and cowl should be provided for the clips which are thrown into space and wasted. A similar chute and cowl should be provided for the spent cases which are also wasted. Ev.{Ivan Evernden - coachwork} | ||