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).
Comparison of foot brake leverage data and pedal travel loss between the Phantom I and Phantom II models.
| Identifier | ExFiles\Box 12\5\ 05-page175 | |
| Date | 30th December 1929 | |
| x7430 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}30.12.29. T x7560 x420 x7950 PHANTOM II LEVERAGES JAN.1930. VARIOUS FOOT BRAKE LEVERAGES. Total Pedal Movement D Steering. Phantom 1 4.5" Phantom II 4.25". Value of .010 Shoe Clearance in Pedal Travel Phantom 1 .500 Phantom II .570 .454 Value of 1.00" Pedal Movement at Axle Lever. Phantom 1 .525 Phantom II .555 .700 Value of one tooth adjustment at shoe centre. Phantom 1 .022 Phantom II .022 Value of one tooth adjustment at axle lever. Phantom 1 .615 Phantom II .700 Value of .010 Shoe Clearance in axle lever movement. Phantom 1 .277 Phantom II .316 LOSS OF PEDAL TRAVEL. Phantom I. Phantom II. (a) Total theoretical travel 4.5" 4.25" (b) Travel left after taking up clearances (.020 shoe centre). 3.00 2.55 (c) Travel left after linkage sprung by servo application 2.125 1.425 (d) Travel left as (c) but brakes warmed up. 1.75 .50 The blue figures represent the effect of altering the brake leverages to 35° cam. and | ||