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).
Bumping tests conducted on special front springs for the 20 HP model.
| Identifier | ExFiles\Box 119\2\ scan0241 | |
| Date | 24th March 1925 | |
| R.R. 493 (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} X4268 EXPERIMENTAL REPORT. COPIES TO: R.C.J. BJ. WOR.{Arthur Wormald - General Works Manager} By.{R.W. Bailey - Chief Engineer} E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} EP.{G. Eric Platford - Chief Quality Engineer} PN.{Mr Northey} OY. RG{Mr Rowledge} Expl. No. 4268 REF. Hs{Lord Ernest Hives - Chair}4/LG24.3.25. OBJECT OF TEST. TESTER. R.{Sir Henry Royce} Bolton. BUMPING TESTS ON 20 HP. CONDITIONS. Standard bumping test conditions. MADE AT CROXLEY SUMMARY OF TEST. This test was primarily conducted to test some special front springs made by Messrs. Firths which they considered would give a longer life than the present 20 HP. springs. It will be seen from the results that this test does not shew the later springs to be any improvement. It is interesting to note that the failure of the dashbrackets and that when 40/50 brackets are used on the 20 HP. they last less than one-third the time they do on the 40/50. This appears to show that there is more frame distortion on the 20 HP. The cross steering lever failure occurred much earlier than it should have done from the previous test results. Hs.{Lord Ernest Hives - Chair} | ||