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).
105-hour bumping test of a Goshawk II chassis, detailing spring failures and future test plans.
Identifier | ExFiles\Box 119\2\ scan0170 | |
Date | 2nd February 1922 | |
X4268 To E.{Mr Elliott - Chief Engineer} from Hs.{Lord Ernest Hives - Chair} c. to CJ. 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} Hs{Lord Ernest Hives - Chair}5/LG14.2.22. X4329 GOSHAWK II. BUMPING TEST. X4429 X4268 We have completed 105 hours bumping test on the rear of the Goshawk chassis. The frame was built up with the improved bracket for the front end of the rear spring, also rear shock absorbers were fitted. During the run we had the following failures - N.S. rear spring - Firths top and 2nd. leaf broke after 16 hours N.S. front spring - broke after 21 hours N.S. rear spring - special Woodhead broke after 29 1/2 hours N.S. rear spring - Standard Woodhead broke after 31 hours N.S. rear spring - Standard Woodhead broke after 28 hours N.S. rear spring - special broke after 85 hours The rear axle used on this test had been used on a previous bump test - it has now completed 182 hours. We adjusted the ball ends for the shock absorbers four times during the run. The shock absorbers were lubricated daily or after every 6 or 7 hours running. We consider the result of this test very satisfactory. It was carried out under the same conditions as we used for the 40/50 H.P. and the results compare very favourably with the 40/50. The next time we run the bump test will be on the front of the chassis with thicker frame, new dumb irons, new front axle, new steering levers, pivots etc. Hs.{Lord Ernest Hives - Chair} | ||