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 successful completion of severe bumping tests on Staybright wheels.
| Identifier | ExFiles\Box 154a\1\ scan0233 | |
| Date | 19th December 1930 | |
| X4111. To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to Ss.{S. Smith} c. to WST. By.{R.W. Bailey - Chief Engineer} Da.{Bernard Day - Chassis Design} Hs{Lord Ernest Hives - Chair}/Sa.1/MJ.19.12.30. STAYBRIGHT WHEELS. We have concluded our severe bumping tests on one of these wheels. We ran the wheel well over 50 hours on the front and rear axles and so far the spokes have remained in perfectly good condition. We think that these wheels could with advantage be subjected to a road test because cornering etc. puts a strain on them which cannot be entirely reproduced on the bump. There is no doubt however that the wheel we have been testing is a superior article to those brought across by Cy. from the States, the spokes of which stretched very badly. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||