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).
The braking performance of the 20/25HP chassis, discussing front wheel braking, servo inefficiency, and contamination of friction surfaces.
| Identifier | ExFiles\Box 5a\3\ 03-page088 | |
| Date | 6th November 1931 | |
| x5840. Hs.{Lord Ernest Hives - Chair} from Mx.{John H Maddocks - Chief Proving Officer} Mx{John H Maddocks - Chief Proving Officer}10/T6.11.31. REPORT ON 19-G-IV - 15,000 miles. x5860. BRAKES. We do not quite agree with Hancocks remarks on this subject which have lead to Sg{Arthur F. Sidgreaves - MD}'s comments Sgl/WTS.11.31. We consider it would be undesirable to increase the front wheel braking on the 20/25HP Chassis. Is it not probable that the comparative general inefficiency of the brakes on this car and the high proportion of braking effect and consequent wear and tear on the back brakes were due to the servo being inefficient. We would like to take this opportunity of stating that the efficiency of the 20/25HP as distinct from the Phantom II is very easily impaired by the slightest trace of oil or grease on the friction surfaces, and if this occurs we have not found it an easy matter to remove the effects of grease particularly on the cotton duck, in fact, the only effective way is to replace the latter. [STAMP: RECEIVED 17 NOV 1931] | ||