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 measurements detailing drop arm load, wheel load, and efficiency percentages for forward and reverse drive.
| Identifier | ExFiles\Box 169\3\ img057 | |
| Date | 23th May 1933 guessed | |
| -2- Measurement of application of drop arm load = 7 3/8" = 7.375" Radius of application of wheel load = 7.625" Load on Drop Arm lbs. Drop Arm Torque lbs. ins. Forward Drive Load on Wheel lbs. ozs. Forward Drive Wheel torque lbs. ins. Reverse Drive Load on Wheel lbs. ozs. Reverse Drive Wheel torque lbs. ins. Forward Eff'y % Reverse Eff'y % 50 368 9. 6 71.5 1. 7 11.0 51.0 30.2 100 737 18. 11 142.4 3. 1 23.3 51.2 32.0 150 1106 26. 15 205.0 4. 12 36.2 53.3 33.1 200 1475 35. 8 270.8 6. 2 46.7 53.8 32.0 250 1843 45. 9 348 8. 5 63.3 52.3 34.7 300 2212 54. 13 418 11. 5 86.3 52.2 39.5 Hs{Lord Ernest Hives - Chair}/F.J.Hardy. | ||