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).
Test report on the disappointing performance of Firths springs for the Goshawk 11.
| Identifier | ExFiles\Box 49\3\ Scan077 | |
| Date | 17th January 1922 | |
| X4261 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} c. to Wd. {Mr Wood / Mr Whitehead} Hs {Lord Ernest Hives - Chair} 1/LG17.1.22. FIRTHS SPRINGS FOR GOSHAWK 11. X4261 X4429 Under pressure from us, Messrs. Firths have recently supplied us with a number of top leaves for the front and rear springs of Goshawk 11. We have tested these springs on the Bump test - the results are disappointing. So far we have broken four top leaves - they have run for - 15 1/2 hours. 11 1/4 " 8 1/2 " 2 1/2 " The average life of the Woodhead spring is approx. 12 1/2 hours - it varies between 9 1/2 and 18 hours. It will be seen that we are much worse off with Firths springs. BY. {R.W. Bailey - Chief Engineer} is taking up the question of material and treatment with the makers. Hs. {Lord Ernest Hives - Chair} | ||