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).
The endurance testing of a 20 HP rear axle, proposing to extend the test from 30 to 50 hours.
| Identifier | ExFiles\Box 49\2\ Scan175 | |
| Date | 14th November 1923 | |
| X4256 To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. RG.{Mr Rowledge} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} c. to E.{Mr Elliott - Chief Engineer} Hs{Lord Ernest Hives - Chair}2/LG14.11.23. 20 HP. REAR AXLE. X4256 On a 20 HP. rear axle fitted with 11/50 axle coarse teeth with the pinion made in air hardened steel, we have completed 30 hours running on 1st. speed, maximum torque. We propose carrying the test to 50 hours. If this axle stands up for that number of hours, we shall then consider it satisfactory and proceed with the other tests. Hs.{Lord Ernest Hives - Chair} E | ||