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).
10-hour non-stop hangar test of an F.10 engine which resulted in a camshaft failure.
| Identifier | ExFiles\Box 43\3\ Scan083 | |
| Date | 1st December 1926 | |
| R.R. 403 (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} X4003 EXPERIMENTAL REPORT. 1.12.26 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. K2917A X2654 REF. Hs{Lord Ernest Hives - Chair}/TAG/LG2.12.26 OBJECT OF TEST. Continuation of hangar test 10-F-X. TESTER. T.A. Gibson. CONDITIONS. F.10. fitted with the Fairey propeller used as a 'pusher'. SUMMARY OF TEST. The engine after being thoroughly inspected after the tests on 30.11.26 was re-started with the object of running 10 hrs. non-stop. For 9 hrs. the running was smooth and without any trouble. During the 10th. hour the engine became rough and started losing power to the extent of 100 r.p.m. It was found that the shaft carrying the inlet rockers on B. side had broken at the stud holes of where it is fastened to Nos. 5 and 6 bearing blocks of camshaft bearing, thereby cutting out No.5 cylinder. The camshaft and rocker mechanism to L.O.P. 27897 was changed. The above constitutes the total damage to the engine. Further inspection proved everything to be O.K. investigation of the broken parts are being continued and will be duly reported upon. The average readings for the 9 hrs. are as follows :- (During the 10th. hr., time was taken investigating the loss in power). contd :- | ||