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).
Technical note on a scheme to use wider brake shoes on P.2 and 25HP models.
| Identifier | ExFiles\Box 120\1\ scan0108 | |
| Date | 6th December 1932 | |
| EXTRACT FROM: 84612. R.{Sir Henry Royce} FROM DA.{Bernard Day - Chassis Design} DAL/M6.12.32. WORK IN PROGRESS - 6.12.32. WIDER BRAKE SHOES. With the two spoke wire wheels we can get wider brake drums on both P.2 and 25HP. We have scheme those for P.2. front brakes, increasing the width of shoes from 1.75 to 2.5". This can be done apparently without disadvantage, and very little modification to existing pieces. The pressure per sq.in. is reduced from 175 to 120 lbs. The rear brake pressure is 153 lbs: we could, if desired, also widen the rear brake shoes. While doing the wider shoes we have also shewn a steel forged shoe in place of the aluminium. It appears as though it could be made very little heavier than the aluminium. DA.{Bernard Day - Chassis Design} | ||