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).
Specifications for a fully counterbalanced crankshaft with a vibration damper.
| Identifier | ExFiles\Box 127\2\ scan0059 | |
| Date | 20th December 1938 | |
| -2- Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager}18/JH.20.12.38. F Crankshaft fully counterbalanced with vibration damper, carried in 4 main bearings (Cadmium). Crankpin dia. 2.12". Road wheel B.H.P. and acceleration curves attached. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} | ||