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).
Test results for steering wobble on a 5-EX car at different speeds.
| Identifier | ExFiles\Box 28\4\ Scan194 | |
| Date | 28th October 1922 | |
| X457 Mr. Hives from GWH.{George W. Hancock - Head Chateauroux} 28.10.22. 5-EX CAR - STEERING WOBBLE TEST. With tyres 895 X 150 - 60 lbs.pressure. The period of wobbles came out as follows M.P.H. Wobbles per min. 6 312 6 280 6 288 6 320 6 312 6 312 12 268 12 268 12 328 12 308 12 320 12 316 GWH.{George W. Hancock - Head Chateauroux} | ||