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).
Requesting results of petrol consumption tests at Brooklands for different axles and engine compressions.
| Identifier | ExFiles\Box 19\7\ Scan067 | |
| Date | 15th September 1922 | |
| To Hs.{Lord Ernest Hives - Chair} from BJ. X790 BJ1/H15.9.22. BROOKLANDS TESTS. X.788. X.4299. X.3056. X.790 Confirming telephone message this morning, we hope that you will be able to send us the result of the petrol consumption tests on the 14 and 15 tooth axles, as it is very essential that we should know the relative petrol consumptions before deciding the policy of how far to make use of each result. The telephone message sent was as follows :- "CJ. has examined Brooklands tests and requires urgently result of comparative petrol consumption tests with 14 tooth and 15 tooth axles as requested by BJ. on the 10th.July BJ3/H10.7.22. Brooklands tests otherwise useless. Mr. Royce coming London on Monday, Board Meeting Tuesday, wish to decide policy. Have you tested with original medium and lowest compression or only with original high and medium compressions? Understand we now only use original medium and lowest compressions". We should of course have been interested to have a comparison between the two compressions which we now use, which I understand are the same as the medium and lowest compressions which were in use before our decision no longer to use the original high compression. The original high compression was 23 1/2; the original medium compression was 26, and these are the compressions which you have apparently used in your Brooklands Test, but you have apparently not made a test of the lowest compression we now use. Please let me know what is the average of the lowest compression we now use. B.J. | ||