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 between the Phantom 1 and Phantom 11 models.
| Identifier | ExFiles\Box 12\5\ 05-page173 | |
| Date | 30th December 1929 | |
| x7360 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}30.12.29. T x7360 x7420 x7930 PHANTOM 11 LEVERAGES JAN.1930. VARIOUS FOOT BRAKE LEVERAGES. Total Pedal Movement D Steering. Phantom 1 4.5" Phantom 11 4.25" Value of .010 Shoe Clearance in Pedal Travel. Phantom 1 .500 Phantom 11 .570 454 Value of 1.00" Pedal Movement at Axle Lever. Phantom 1 .525 Phantom 11 .555 .700 Value of one tooth adjustment at shoe centre. Phantom 1 .022 Phantom 11 .022 Value of one tooth adjustment at axle lever. Phantom 1 .615 Phantom 11 .700 Value of .010 Shoe Clearance in axle lever movement. Phantom 1 .277 Phantom 11 .316 LOSS OF PEDAL TRAVEL. Phantom 1. Phantom 11. (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 35º cam. and | ||