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).
Proposed modifications and issues for Commander Briggs' car, including camshafts, springing, and brakes.
| Identifier | Morton\M11\ img052 | |
| Date | 7th April 1917 | |
| To EP.{G. Eric Platford - Chief Quality Engineer} & EH. from R.{Sir Henry Royce} 2. X.2937 Commander Briggs also desires that we fit one of our new camshafts that we propose using in the "after the War" engines. This should not be the temporary arrangement but the permanent arrangement. When you fit this, it will be necessary to fit the larger carburetter, as used on 7 CA. X.2650 Regarding the springing of Commander Briggs' car, owing to the small clearance between the body and the wheels it would seem desirable to keep the springing above the axle. also It gives the car a better appearance than the present arrangement. The ill effect of this position is largely got over by the fact that the springs at present used on this car have the long leaf split. The springs appear to be on the flexible side for the car when loaded with the full number of people, and it will probably be desirable to increase the stiffness of these, say 10%, as well as fit shock absorbers, either of the X762 Truffault type or the R.R. type. It is of the utmost importance for such high speed work that shock absorbers should be fitted to the back axle as soon as possible. Mr. Johnson informed me that on running on the side of the road the brake was put on owing to the heeling over of the car, but two things appear to happen. There may be a little end play in the ball bearings of the rear wheel, or the ball bearings themselves may have end motion on the axle. Consequently, the brake drum rubs against the guard provided to keep dirt and water from the inside of the brake mechanism. (Contd.) | ||