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).
Rear spring safety stops and the comparative risk of propeller shaft failure on various car models.
| Identifier | ExFiles\Box 105\2\ scan0110 | |
| Date | 24th January 1930 | |
| Wor.{Arthur Wormald - General Works Manager} From Hs.{Lord Ernest Hives - Chair} LETTER [text is struck through] X5340 Hs.{Lord Ernest Hives - Chair}2/MJ.24.1.30. Both on the 20 HP. and Phantom ll we have a safety stop arranged so that if a rear spring breaks no damage can occur. X7340 We consider the risk of the propeller shaft breaking is no more than the risk of steering parts failing. We have taken all possible precautions by over-load test and can suggest no more. The failures on the Silver Ghost were when we used a counter-shaft foot brake and we know from actual tests that if this brake was abused the propeller shaft could be damaged. Hs.{Lord Ernest Hives - Chair} | ||