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 drum distortion tests with ribbed and plain drums.
| Identifier | ExFiles\Box 120\1\ scan0086 | |
| Date | 6th June 1932 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from F.Dodd. X4612. BRAKE DRUM DISTORTION TESTS WITH RIBBED AND PLAIN DRUMS. Left Table: 19.G.IV. | | Unloaded | Normal loading | Loaded | |---|---|---|---| | Pedal Movement :- | 6.625" | 3.625" | 2.625" | | Pedal clearance taken up :- | | 3.00" | 1.00" | | Brake lever movement :- | | .8125" | 1.1875" | | Brake lever movement :- | | | .25" | | Brake Pedal Poundage :- | | | 180 lbs | Right Table: 18.G.IV. | | Unloaded | Normal loading | Loaded. | |---|---|---|---| | Pedal Movement :- | 6.625" | 4.5" | 3.25" | | Pedal clearance taken up:-| | 2.125" | 1.25" | | Brake lever movement :- | | .875" | 1.0625" | | Brake lever movement :- | | | .1875" | | Brake Pedal Poundage :- | | | 180 lbs. | Diagrams: Left (19.G.IV - Plain Drum): EXPANSION. with measurements .00275" & .006" CONTRACTION. with measurements .0025" & .005" Right (18.G.IV - Ribbed Drum): EXPANSION. with measurements .0025" & .0035" CONTRACTION. with measurements .0025" & .0025" | ||