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).
Shaft dimensions, speeds, end play reduction in trunnions, and testing suggestions.
| Identifier | ExFiles\Box 148\4\ scan0151 | |
| Date | 8th June 1940 | |
| -3- Rm{William Robotham - Chief Engineer}/GB.4/JH.8.6.40. This shaft was 2" dia. 48 1/2" long between centres and 0.065" thick. This gives a Hardy Spicer speed of 4360 r.p.m. and 4650 r.p.m. by Mechanics formula. The Mechanics formula is not given but he mentions that it is 85% of theoretical. In this note Olley has stressed the need for reducing end play in the trunnions, this has been reduced from .006" to .004" on Pontiac with a consequent reduction in rejects of from 17%(and returning 20% for rebalance) to 3 or 4%. Another suggestion was to put an engine and axle on trestles with a prop. shaft between and do some testing of angles and noise away from the car. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} Bastow. Rm{William Robotham - Chief Engineer}/GB. | ||