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).
Temporary scheme for strengthening the Spectre rear axle pinion.
| Identifier | ExFiles\Box 92\5\ scan0029 | |
| Date | 2nd October 1935 | |
| GRY{Shadwell Grylls} DY.{F R Danby} from Da.{Bernard Day - Chassis Design} c.c. Hs.{Lord Ernest Hives - Chair} Hdy.{William Hardy} RHC.{R. H. Coverley - Production Engineer} x302 Plan Da.{Bernard Day - Chassis Design}1/HP.2.10.35. SpectreCodename for Phantom III - Rear Axle Pinion. Herewith is N.Sch.4651 shewing the strengthening of the drive to the rear axle pinion by increasing the taper to 1 in 8 and increasing the woodruff keys. This scheme is a temporary one, using the existing pinions. The increase of driving torque is 91½% from the taper alone, the keys having an increase of 61%. The torque provided at .200 coefficient is 4.4 times the 2nd speed torque. We are about to issue a final scheme, in which the increase of torque will be 108½%, that is, 4.86 times 2nd speed torque. Da.{Bernard Day - Chassis Design} | ||