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).
Blueprint graph showing efficiency and movement tests for Girling Brakes under load.
| Identifier | ExFiles\Box 120\3\ scan0129 | |
| Date | 3rd January 1935 guessed | |
| PERCENTAGE EFFICIENCY 100 90 80 70 EFFICIENCY GIRLING BRAKES BRAKE SHOES WORKING AGAINST SPRING LOADED CLAMP MOVEMENT - THOUSANDTHS OF AN INCH 125 100 75 50 25 0 LOAD - lbs 0 20 120 220 320 420 12 | ||