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).
Bumper test report on a Goshawk 11 chassis, detailing component failure times in hours.
| Identifier | ExFiles\Box 49\3\ Scan062 | |
| Date | 28th October 1921 | |
| x4261 Hc3 / 28.10.21 28.10.21 BUMPER TEST ON GOSHAWK 11. CHASSIS. Unit. | Total number of hours run before failure. -- | -- Rear spring clip on off-side front spring. | 7 1/2 hours. Rear spring clip on near-side front spring. | 10 1/2 hours. Rear spring clip on near-side front spring. | 7 1/2 hours. Top leaf off-side front spring. | 10 1/2 hours. Top leaf near-side front spring. | 12 1/2 hours. Top leaf off-side front spring. | 9 1/2 hours. Off-side cross steering arm. | 11 1/2 hours. Near-side steering arm. | 20 1/2 hours. R.R. 258A (100T)(S) 119. H & S (L) G 9800 | ||