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).
General conclusion on vehicle testing, focusing on braking systems, tyre wear, and petrol feed problems.
| Identifier | ExFiles\Box 180\M2\M2.4\ img008 | |
| Date | 23th July 1920 | |
| Contd. -8- (Stamped and handwritten text in top right corner): XO2 DECARBONIZING TEST DEPT 23.7.20. WEYMAN BRAKES H.S/1023.7.20. AHW GENERAL CONCLUSION. X-3453 The brakes are certainly the outstanding feature on this car. There is no doubt that the braking on all four wheels must give better braking effect than braking on rear wheels only. Apart from the fact that the car can be pulled up more quickly and smoothly, there is also the very important consideration that the tyres should last longer. When we carried out comparative tests with the R.R. and Delage for braking, the wheels were locked for most of the test on the R.R. and the tyres were scraping along on the road. On the other hand we have got to admit that the Delage brakes, as they are, would not stand up to the rigorous treatment we expect our brakes to stand. The car on the road was very nice to drive as long as the engine was kept running fast but if one tried to creep along on top gear the carburation was bad because immediately one tried to accelerate the engine would cut out. The Vacuum Feed for the petrol supply was used - it was made by "Weyman" Paris. We found, however, on the dynamometer that it would not supply sufficient petrol at at full throttle as we had to run it on pressure feed. Hs.{Lord Ernest Hives - Chair} | ||