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. Spectre(Codename 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} | ||
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).