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).
Meeting notes discussing modifications to the Spectre chassis, brakes, brake pedal, and clutch.
Identifier | ExFiles\Box 92\4\ scan0062 | |
Date | 19th February 1935 | |
(2) E.6/HP.19.2.35. -------------------- N. Sch.4360. Rear brakes with Bentley adjustment and Girling linkage. N. Sch.4380. Front brake differential and linkage. The question of the improved original type of adjustment was discussed, and it is reported that the sponge is reduced by this modification to a half. This intermediate scheme of adjustment is instructed for the second SpectreCodename for Phantom III chassis, and it was agreed that this chassis should be finished to the original specification, and that the best policy would be to apply the improved semi-servo scheme with Bentley adjustment to the first SpectreCodename for Phantom III car. This is intended to make clear that there is no interruption whatever of the progress of the second SpectreCodename for Phantom III. In addition to the parts for the brake gear on the first car it will be necessary to change the gearbox to the latest type with the larger servo. The aforegoing means that we shall want two sets of brake parts to the above drawing, one set for No.1. SpectreCodename for Phantom III and another set for No.3. SpectreCodename for Phantom III. A third set of part of this material will also be required for the fourth chassis but the requirements in this connection will be included in the specification for the fourth chassis, which will have conventional front springing. Brake Gear. - With regard to brake drums, it was agreed that the cooling ribs should be stiffened up for increasing the general stiffness of the drums. Brake Pedal. - On the actual chassis being run about the brake pedal lever fouls the cross, but as adequate clearance has been allowed on the design an investigation of this will be made. Clutch. - More travel on the clutch pedal is required and more pressure to get the separation we want which is equivalent to that used on the Phantom. A modification to the cross or the footboards will be necessary for the increased stroke of the clutch pedal level. It was agreed that the clutch pedal should be sprung to stay out in the worn position so as to avoid an unpleasant vibration on the pedal, and it was thought that this | ||