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).
Standardising the Hardy Spicer propeller shaft instead of experimenting with a welded swaged tube.
| Identifier | ExFiles\Box 148\4\ scan0055 | |
| Date | 25th February 1937 | |
| By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} c. to Hs.{Lord Ernest Hives - Chair} 1262 Rm{William Robotham - Chief Engineer}/Gry{Shadwell Grylls}5/R.25.2.37. PROPELLER SHAFTS. We are hoping to standardise very shortly the Hardy Spicer Propeller Shaft, which has a parallel welded tube construction. In view of this, we do not think it worth while experimenting with the welded swaged tube. We do not think any bottom gear testing would show up trouble in such a tube. We think that high speed running, very near whirling speed, would be most likely to cause trouble. We have no rig on which we can run say 500 hours at 4,500 revs. It is very unlikely that another car will go to France which has not got the Hardy Spicer Propeller Shaft. In view of this we do not think that we shall ever be in a position to issue a standardisation sheet for the welded swaged tube. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||