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).
Brake performance tests, comparing stopping distances and providing qualitative feedback.
| Identifier | Morton\M2.4\ img006 | |
| Date | 1st July 1920 | |
| Contd. -6- H82/T625.7.20. A682.R.R Speed. Road conditions. Distance in yds. to bring car to stop. R.R. Delage. 20 M.P.H. Dry tarmac. 15 yds. 7 yds. 30 M.P.H. " 32 yds. 18 yds. 40 M.P.H. " 57 yds. 40 yds. TESTS ON DELAGE USING FRONT BRAKES ONLY. 20 M.P.H. " 14 yds. 30 M.P.H. " 38 yds. 40 M.P.H. " 82 yds. We should not anticipate that the brakes would stand up very long if used continuously. There are no cooling ribs on the drums and as the drums are so light and springy under ordinary conditions, we think that they would soon get very hot and relieve the braking load. The details of the brakes otherwise appear to have been carried out very well. The brakes give one a very nice sense of security when driving fast. It is a nice feeling to know that one can apply the brake quickly at a corner and know that the car is not going to jump about on the road. We think that the control of the back axle may have something to do with the smooth braking effect because even when using the countershaft brake on this car, although the wheels locked and the car skidded, it did not jump on the road. Contd. | ||