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).
Modifications to the servo brake mechanism to reduce front braking power.
| Identifier | WestWitteringFiles\P\2October1926-December1926\ Scan088 | |
| Date | 1st December 1926 | |
| ORIGINAL TO DY.{F R Danby}) FROM DA.{Bernard Day - Chassis Design} HS.{Lord Ernest Hives - Chair}) SERVO BRAKE MECHANISM. DA{Bernard Day - Chassis Design}2/M1.12.26. X7370 V8370 With reference to the servo brake opera-tion we have wired you suggesting that the existing standard cam angle should be retained on the proposed 2" levers on the servo shaft. This is in accordance with R1/M251126., in which R.{Sir Henry Royce} suggests that the power of the servo should be reduced 25%. If this is found successful on EAC. 7. we suggest that it would be the best way of obtaining the proposed reduced front braking on the standard car, and is preferable to altering the length of the levers on the front brake differential shaft. This latter proposal, by tending to reduce the angle of movement through which the servo works, reduces its effectiveness without giving any relief from the point of view of pressure per square inch, and wear. The use of the shorter levers retains the present movement of the servo with a reduced pressure, and so gives improved wear and probably more constancy in service. RECEIVED Hs{Lord Ernest Hives - Chair} 3 DA{Bernard Day - Chassis Design} DEC 1926 | ||