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 De Havilland Aircraft Co. Ltd. inquiring about the necessity of a battery master switch.
| Identifier | ExFiles\Box 168a\2\ img186 | |
| Date | 13th November 1935 | |
| slc139 Hs{Lord Ernest Hives - Chair}/Wat.13/MA. 13th November, 1935. The De Havilland Aircraft Co.Ltd., Hatfield Aerodrome, HERTS. 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. | ||