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).
Comparative tests on Phantom III idler gears to determine torque and ageing effects.
| Identifier | ExFiles\Box 136\5\ scan0334 | |
| Date | 10th June 1939 | |
| 1152 HL/GLT. from BY/SB.{Mr Bull/Mr Bannister} c.c. BY.{R.W. Bailey - Chief Engineer} c. Rm.{William Robotham - Chief Engineer} BY/SB.{Mr Bull/Mr Bannister}6/G.10.6.39. PHANTOM III - IDLER GEARS. We confirm having handed to you the following :- (1). Two idler gears with a number of teeth stripped off. (2). An idler gear which has run 30,000 miles satisfactorily. (3). A new gear of the same type. These are for comparative tests to determine the torque required to shear off the teeth, and to see whether there is any difference due to ageing of the fabric foundation. BY/SB{Mr Bull/Mr Bannister} | ||