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).
Log of a running test on the rear of a 40/50 chassis, detailing failures over 100 hours.
| Identifier | ExFiles\Box 180\M1\6\ img034 | |
| Date | 15th December 1921 guessed | |
| 40/50 CHASSIS. Running Test on Rear of Chassis. Total hours Remarks 30 hours. Bolt fixing stay for centre bracket for cantilever spring broken. 42 " Stay broken on centre bracket of rear spring. 53 " Rear spring second leaf broken O.S. 87 " Flange on cross member at centre bearing broken. 89 " Rear spring 3rd. and 4th. leaves broken N.S. 100 " O.K. COPY OF M.S. SHEET (ORIGINAL) No. 11/1703A | ||