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).
Brake shoe deflection, materials, and design on a 3-B-IV chassis.
| Identifier | ExFiles\Box 92\4\ scan0014 | |
| Date | 21th September 1934 | |
| -2- (3) .010 deflection of the shoe itself. These add up to .041 at the cam or .492 at the external lever. We have established on 3-B-IV chassis, which has direct braking to all wheels, that in order to prevent the pedal leaving the floorboards due to relative drum and shoe expansion we have to use steel shoes with brass rivets running in contact with the drum, the clearance then remaining very nearly constant. Will Da.{Bernard Day - Chassis Design} please let us have drawings of steel shoes. As a guide we can say that the Bentley shoes to R.R.Sch.310 are not stiff enough, deflecting .009 under load compared with .006 of the standard aluminium shoe. We think in each case the deflection takes place in the toe of the shoe where the flange is no longer continuous due to the tipping shoe. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||