The failure of a 20 HP rear axle pinion made from air-hardened steel and the plan to test standard gears.
| Identifier | ExFiles\Box 49\2\ Scan176 | |
| Date | 15th November 1923 | |
| X4256 To R. {Sir Henry Royce} from Hs. {Lord Ernest Hives - Chair} c. to CJ. c. to Rg. {Mr Rowledge} c. to Da. {Bernard Day - Chassis Design} c. to BY. {R.W. Bailey - Chief Engineer} c. to E. {Mr Elliott - Chief Engineer} __________________ Hs {Lord Ernest Hives - Chair} 3/LG15.11.23. 20 HP. REAR AXLE. 4256 The 20 HP. rear axle fitted with 11/50 gears with the pinion made from air hardened steel, ran for 34 hours on 1st. speed. maximum torque. W After that amount of running several teeth broke on the pinion. We are now about to test an 11/50 axle with the standard C.H.N.S. gears similar to those we are at present sending out on cars. Hs. {Lord Ernest Hives - Chair} | ||
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).