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 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/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. | ||