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).
Report comparing the performance of a standard 12-volt battery against various alternatives and noting a future report on 20 HP batteries.
| Identifier | ExFiles\Box 54\1\ Scan240 | |
| Date | 16th February 1927 guessed | |
| -2- Contd. CERTIFICATE OF INSPECTION BY A.I.D. SPARES It is now extremely improbable that any alternative 12-volt batteries of the same size and weight can put up a better all round performance than is now shewn by our standard battery. At any rate, it is a fact that we have not obtained anything like the performance from various batteries of other makes which have in the past been tested. It is satisfactory to note that there is very little to choose between our two standards, and that it would be very difficult to come to a conclusion that one was definitely better than the other. In due course it will no doubt be of interest for a similar report in connection with the 20 HP. batteries to be circulated. EFC. {E. Fowler Clarke - Electrical Engineer} Attached:- Reports JC.74/5 3 blueprints. (Reversed text from stamp) This is to certify that the engine or parts enumerated above have been subjected to A.I.D. Inspection and are considered satisfactory in accordance with the standard required for service in the Royal Air Force. At (Signed) FOR CHIEF INSPECTOR OF ENGINES. AERONAUTICAL INSPECTION DEPT. "ACTING" GROUND ENGINEER ON BEHALF OF MESSRS. ROLLS-ROYCE, LTD. IN AGREEMENT WITH THE C.C.A. (Handwritten) Copy to Mr O.C. R.O.A. Copy to Mr R.R. Ltd. Copy to Mr O.C. A.I.D. | ||