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).
Brake design improvements concerning Ferodo lining, drum weight, front axle twist, and artillery wheel hub compatibility.
| Identifier | WestWitteringFiles\L\April1924-June1924\ Scan43 | |
| Date | 26th May 1924 guessed | |
| (2) (4) Though jaggers still appear it is understood that by reducing the amount of ferodo on the shoes they can be made negligible, this reduction of ferodo being possible because it is desired in any case to reduce the amount of front braking. In addition to this the experiment of reducing the thickness of the drums should be persisted in and unless definite objections are found to it, it will be adopted, the reduced weight of the drums being a real advantage. (5) The twisting of the front axle under the braking load is being satisfactorily dealt with by this reduction of front braking previously mentioned, and in addition the Experimental Dept. are determining the maximum amount of backward lean which they can have without producing steering wobbles, and without making the steering too stiff. (6) The use of artillery wheels mounted as hitherto on the Dunlop detachable hub is not possible with 4 wheel brakes because the amount of off-set between the point of contact on the ground of the wheel and the pivot is too much. We are however setting out a design of hub for the artillery wheel which will enable them to be used on the standard four wheel brake axle, the only special parts required being the hub. (7) The speed of the servo to be 7 to 1. DA.{Bernard Day - Chassis Design} | ||