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).
Blueprint graph showing the efficiency of Bentley brake toggles under varying loads.
| Identifier | ExFiles\Box 84\2\ scan0244 | |
| Date | 21th December 1934 guessed | |
| M F H EFFECIENCY OF BRAKE TOGGLES, ETC. (BENTLEY) LEFT Y-AXIS: DEFLECTION OF BRAKE SHOES AT TOGGLE PIVOTS 1/1,000"S MOVEMENT RIGHT Y-AXIS: % EFFECIENCY X-AXIS: LBS - LOAD APPLIED AT LAST EXTERNAL 3.5" CENTRES LEVER. PLOT LINES: EFFECIENCY LOAD DECREASING 100% EFFECIENCY LINE LOAD INCREASING TEXT BOX: BRAKE DRUM OILY ZERO LOAD ON SHOES = WT. OF WEIGHT PAN. EFFECIENCY AT "PULL OFF SPRING" LOAD = 46% MAX: LOAD (500 LBS) = 72% | ||