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).
Seizure issues with the Phantom III propeller shaft and proposed solutions.
| Identifier | ExFiles\Box 94\4\ scan0111 | |
| Date | 4th May 1936 | |
| DY.{F R Danby} C.B. Hs.{Lord Ernest Hives - Chair} Da.{Bernard Day - Chassis Design} RHC.{R. H. Coverley - Production Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X337 Ram GRY{Shadwell Grylls} E/HDY.{William Hardy}1/HP.4.5.36. Propeller Shaft - Phantom III. We are informed by the Experimental Department that the sliding joint of the propeller shaft frequently shows heavy marks due to seizure, particularly in the cylindrical surfaces and that this is so bad that it is thought some improvement must be made on all cars. It is not clear what is the cause of this trouble as the flat driving surfaces appear to suffer less than the cylindrical surfaces. There is also being experienced seizures on the spherical ends of the universal joint pins. This appears to be due to the rather small clearance allowed being taken up by distortion of the joint rings when under load. The suggestion as regards the spline seizure is that the inner splined piece should be hardened on all surfaces. No change of material is required as the pins on this piece are already hardened. A hardened piece is being fitted to the car about to go to France on 10,000 mile test. If you are in agreement will you kindly issue instructions to change to the hardened splines on the inner piece. We have noticed that the flanged disc which is fitted in the bore of the splined piece appears to have expanded the splines in some cases. This disc is sweated in and should not be a tight fit. E/HDY.{William Hardy} | ||