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 results of a bump test on a Goshawk II chassis, noting a permanently set frame and other cracked components.
| Identifier | ExFiles\Box 180\M1\5\ img008 | |
| Date | 1st December 1921 | |
| To 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/LGS.12.21. BUMP TEST ON GOSHAWK II. CHASSIS. X4260 X4219 We have checked up the Goshawk Frame which was running on the bump test. This frame has been bumped for 75 hours on the rear and 29.5 hours on the front. We find that the back portion of the frame has taken a permanent set.*! Attached to Mr. Royces' copy of this memo, is sketch showing where the frame has bent. For the bumping test we have been using a ballast box so that the disposition of the weight was different to what it would be with the body fitted. We have, however, only loaded the car until the springs were a normal camber. Before the frame was put on the bump test, it was checked over to see that it complied with the drawing. We are also sending a pair of gusset plates off this frame which carry the radiator. It will be seen that both of them have cracked. We are also sending the flange of the front cross member which has failed. Hs.{Lord Ernest Hives - Chair} | ||