Test report comparing the frictional torque of a Phantom III R.R. propeller shaft against a Bentley Hardy Spicer shaft.
| Identifier | ExFiles\Box 87\3\ scan0063 | |
| Date | 7th July 1936 | |
| To H.I.Gry. {Shadwell Grylls} x-237 Hs {Lord Ernest Hives - Chair} /WB. {Mr Brazier / Mr Bell} 16/KW.7.7.36. Please Return H {Arthur M. Hanbury - Head Complaints} /GRY {Shadwell Grylls} Propellor Shaft Spindle Test. Comparison between Phantom III R.R. (G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 82089) and Bentley Hardy Spicer Shaft. With the shaft suspended by its rear axle coupling, a load was applied to the sliding-gearbox-coupling, to which a torque arm was also attached. The frictional torque in relation to the thrust load of one of each of the above types of shaft - both shafts were new - was ascertained. From the results, shown on the attached chart, the R.R. shaft proved to be better than the Hardy Spicer shaft. Incidentally a rough check was taken of the Hardy Spicer shaft off B-56-BN {W.O. Bentley / Mr Barrington} , before refitting to the chassis, the torque of 38 lbs/ft. at 120 lbs. thrust load being the same as for the new shaft. Hs {Lord Ernest Hives - Chair} /W.Bell. | ||
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).