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).
Letter to Imperial Airways Ltd. about the necessity of using a battery master switch on their machines.
| Identifier | ExFiles\Box 168a\2\ img187 | |
| Date | 13th November 1935 | |
| 6139 Hs{Lord Ernest Hives - Chair}/Wat.15/MA. 13th November, 1935. Imperial Airways, Ltd., Victoria Station, London, S.W.1. Dear Sirs, We should esteem it a favour if you could inform us whether you have found it necessary to use a battery master switch on any of your machines for cutting off the battery complete from the wiring system in emergency. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||