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).
Design of the brake and clutch pedals for the Myth chassis.
| Identifier | ExFiles\Box 110\1\ scan0031 | |
| Date | 24th January 1941 | |
| To Rm.{William Robotham - Chief Engineer} from Ev{Ivan Evernden - coachwork}/JD.{J. Draper - Frames} c. to Ev.{Ivan Evernden - coachwork} c. to Rm{William Robotham - Chief Engineer}/HH. c. to Rm{William Robotham - Chief Engineer}/EAG. 706 1080 Ev{Ivan Evernden - coachwork}/JD.{J. Draper - Frames}4/SW.24.1.41. MYTH. P E D A L S. PL.445 - Pedals, Brake & Clutch. We attach to Rm{William Robotham - Chief Engineer}/HH's copy the original of the above scheme shows the design of the pedals for the Myth chassis. The brake pedal is 10.6" from the centre line of the chassis and not 11.5" as originally projected on PL.307, due to the fact that the pedal in the downward position would foul the frame. The brakes are Lockheed operation, both front and rear, the brake pedal operating directly onto the Tandem master cylinder, drawing No.PR.646., the pedal ratio to the master cylinder being 5½ : 1. The clutch mechanism has the swinging arm operation similar to the Senior Range, and as the Myth clutch is only 7¼" in dia. and the trunnion load 132 lbs., we have lightened the clutch lever accordingly. We are going ahead with the design of the clutch actuation, which will be finished in the course of a few days. Ev{Ivan Evernden - coachwork}/JD.{J. Draper - Frames} Original to Rm{William Robotham - Chief Engineer}/HH. Prints to Ev.{Ivan Evernden - coachwork} Rm{William Robotham - Chief Engineer}/HH. Rm{William Robotham - Chief Engineer}/EAG. Ashby. | ||