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).
Calculations for spanner torque required to prevent clonking in two different cases.
| Identifier | ExFiles\Box 10\4\ 04-page35 | |
| Date | 16th February 1938 | |
| -2- Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}2/AP.16.2.38 In case (1) the spanner torque must be 14 / 3.750 of 1st.speed torque. In case (2) the spanner torque must be 14 / 4 of 1st speed torque. In 25/30 1st. speed torque in one rear wheel is 200 X 3.3 X 4.55 / 2 = 1500 lbs. ft. Spanner torque to prevent clonking case (1) is 3650 lbs.ft. Spanner torque for case (2) is 5250 lbs, ft. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||