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).
Table of particulars for servo-operated brakes across various car models.
| Identifier | Morton\M19\ img092 | |
| Date | 4th December 1930 | |
| PARTICULARS OF SERVO OPERATED BRAKES TYPE OF CAR FRONT BRAKES TOTAL AREA OF FRICTION SURFACE BRAKE AREA PER TON LOAD FRICTION MATERIAL REAR BRAKES TOTAL AREA OF FRICTION SURFACE BRAKE AREA PER TON LOAD FRICTION MATERIAL Silver Ghost: Front Brakes: -, -, - | Rear Brakes: 142.8 sq" †, 110.0 sq", Ferodo Phantom I: Front Brakes: 78.4 sq" *, 66.6 sq", Ferodo | Rear Brakes: 142.8 sq" †, 105.8 sq", Ferodo Phantom I (Later Series): Front Brakes: 78.4 sq" *, 65.3 sq", Ferodo | Rear Brakes: 94.4 sq", 69.9 sq", Ferodo Phantom II: Front Brakes: 69.6 sq", 58.0 sq", Ferodo | Rear Brakes: 94.4 sq", 69.9 sq", Ferodo Phantom II (Later Series): Front Brakes: 85.7 sq", 81.7 sq", Ferobestos | Rear Brakes: 129.3 sq", 95.8 sq", Ferobestos Phantom II (Locomotive Type): Front Brakes: 89.5 sq", 85.3 sq", Ferobestos & AMR.2 | Rear Brakes: -, -, - 20 H.P.: Front Brakes: 87.6 sq", 83.5 sq", Ferodo | Rear Brakes: 108.0 sq", 115.2 sq", Ferodo 20 H.P. (Later Series) & 25 H.P.: Front Brakes: 53.6 sq", 72.1 sq", Ferodo | Rear Brakes: 115.2 sq", 123.0 sq", Ferodo * Will increase to a further 18.0 sq" area with wear, (owing to chamfer on Ferodo) † Includes area of Rivet Heads (which are in contact with Drums). NOTE: THE BRAKE AREA PER TON LOAD IS BASED ON THE WEIGHT OF AN AVERAGE COMPLETE CAR. | ||