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).
Bump test for the Goshawk 11, detailing failures of rear spring brackets and another rear spring.
| Identifier | ExFiles\Box 180\M1\4\ img003 | |
| Date | 17th November 1921 guessed | |
| R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to Wor.{Arthur Wormald - General Works Manager} ORIGINAL Hsl/LG17.11.2.1 BUMP TEST ON GOSHAWK 11. X4219 X4262 We have now broken altogether four brackets which hold the front end of the rear spring. One of these brackets only lasted 8 hours on the bump - another one lasted 60 hours. This, we consider, rather points to the fact that the difference must be caused by the condition of the metal due to the brazing. We have also broken another rear spring. This has been run the whole time without the end clip for the leaves. The fracture has occurred about 1" from the clip. This proves that removing the clips has not increased the life of the springs. Hs.{Lord Ernest Hives - Chair} | ||