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).
Speed and acceleration tests at Brooklands on a 49-GB car with different axle ratios and engine compressions.
| Identifier | ExFiles\Box 29\3\ Scan079 | |
| Date | 15th June 1920 | |
| R.R. 199 (250T) (SD676 19-7-17) MP180865 X.788. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to BJ. c. to Bn.{W.O. Bentley / Mr Barrington} c. to E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to By.{R.W. Bailey - Chief Engineer} c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to Oy. c. to Na.{Mr Nadin} Hs{Lord Ernest Hives - Chair}3/LG15.6.20. X.3612. X.2631. X.3545. X.788. RE - TESTS CARRIED OUT AT BROOKLANDS. with 49-GB CAR. We have been carrying out some tests on Brooklands Track with 49-GB Car which is fitted with a 4-seater open-touring body. The object of the test was to find out the difference in speed and acceleration comparing the present standard axle 16 x 52 with the new low geared axle 15 x 52. We have also compared the difference between a high nd medium compressed engine. (We still have to complete the test with the low compression engine). It is also our intention to carry out similar tests with a car fitted with a covered body. We shall be sending a complete report which will give the windage of the car and HP. of the engine when our further tests are completed. As far as we have gone, the tests show that the maximum speed of the car is the same with the low geared axle as with the present standard axle. There is, however, an appreciable gain in acceleration with the low geared, axle compared with the present standard axle. Hs.{Lord Ernest Hives - Chair} | ||