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).
The results of brake wear and performance tests under different configurations.
| Identifier | ExFiles\Box 12\5\ 05-page281 | |
| Date | 14th April 1931 | |
| H/S 7360 14/4/31 BRAKE TESTS. No. of brakings from 70-10 MPH. No. of brakings from 40-10 MPH. Wear of F.{Mr Friese} brakes 3/8" = 1 notch. Wear of R.{Sir Henry Royce} brakes Pedal Movement 1" = 1 notch. ------------------------------------------------------------------------------------------------------ Cast Iron Drums with Ferodo rear lining. Ferobestos Front. 243 624 3/8" = 1 1/4 notches. 2" = 2 notches Total miles run 884. 450 Cams on Servo. ------------------------------------------------------------------------------------------------------ Cast Iron Brake Drums Rear Brakes lined with Ferobestos. Front Brakes lined with " Servo Cams changed to 350 239 464 1" = 2 3/4 notches. 3 1/2" = 3 1/2 notches Total miles run 787. ------------------------------------------------------------------------------------------------------ Plain Standard Drums. Cresswell 999W. lining Rear & Front. 350 Cams. 78 460 5/8" = 1 3/4 notch. 2 5/8" = 2.625 notches. Total miles 858. | ||