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).
Poor performance of S.4947 servo linings and their successful replacement with Mintex linings.
| Identifier | ExFiles\Box 141\1\ scan0009 | |
| Date | 8th January 1935 | |
| Handwritten: Hardy. Can you explain this please? Pm Handwritten: x3409 To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/WB.{Mr Brazier/Mr Bell}3/KW. 8.1.35. Servo Linings. We have tried out S.4947 servo linings on 20-G-IV and 1-B-IV. In each case after fitting these liners the brakes were very poor and spongy. On 20-G-IV the servo output was checked and gave 225 lbs. against 300 lbs. foot pedal load. We decided to fit Mintex linings to prove the point and these gave an output of 375 lbs. The servo was then finally built up and the brakes had recovered. Hs{Lord Ernest Hives - Chair}/W.Brazier: W. Brazier | ||