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).
Test criteria and considerations for a propeller shaft.
| Identifier | ExFiles\Box 154a\3\ scan0215 | |
| Date | 27th March 1936 guessed | |
| PROPELLOR SHAFT. (1) Whirling and periods. (2) Durability. (3) Weight. (4) Maximum torque capacity. (5) Freedom of splines under load. 15,000 miles on the Continent, including freak Devonshire hills. 5 hours maximum torque low gear. | ||