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).
Graph showing the twist (angular deflection) of different front springs under braking torque.
| Identifier | ExFiles\Box 72\3\ scan0090 | |
| Date | 23th August 1924 guessed | |
| FRONT BRAKES TWIST OF FRONT SPRINGS UNDER BRAKING TORQUE. Y-Axis: ANGULAR DEFLECTION OF SPRING Values: 6.00, 5.67, 5.33, 5.00, 4.67, 4.33, 4.00, 3.67, 3.33, 3.00, 2.67, 2.33, 2.00, 1.67, 1.33, 1.00, .67, .33, 0 X-Axis: TORQUE LBS INS Values: 0, 2000, 4000, 6000, 8000, 10000, 12000, 14000, 16000, 18000. Graph Lines: STD. K/SM H.2 SPRING 42" SPG No. 4. 12 1/2 % STIFFER 43 1/2" SPG No. 3. 25% STIFFER 43 1/2" | ||