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 wear and condition of various components including the flywheel, clutch, and radiator after testing.
| Identifier | ExFiles\Box 91\2\ scan0377 | |
| Date | 23th September 1937 | |
| - 8 - HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth}1/VS.{J. Vickers}23.9.37. Flywheel and Clutch LOP.G.85261 (Continued). Flywheel G.85200 in S/HC. Integral Gear Ring teeth chamferred to G.85191. The surface of this material picks up more than that of the Millenite Pressure Ring, as evidenced by the amount of metal in the lining. The Flywheel friction faces were flat within .0015. The Gear Ring Teeth, though not quite so bad as those of 35-EX after its 20,000 miles test, were badly damaged. (Herewith photographs of same). The Clutch Driving Shaft was rusty locally around the splined driving area, but at the same time was free to float. The operating mechanism was satisfactory, lubrication adequate and wear negligible. There was very little foreign matter present in the Ventilated Clutch Casing, and the presence of oil was less than usual. The stay from the Clutch Casing to the Pedal Shaft was worn at the front end, as also was the pin in the Clutch Casing. At the rear end, where a bronze bush is fitted, the condition was good; the total wear at the front end was .020. Radiator LOP.E.87239. Internally, the matrix unit was in good condition; there were no signs of silting or choking up. The steam valve which was set at 2 1/2-3 lbs. before test began to leak slightly at 1/4 lb. pressure; the leak increased until the valve blew off at 4 1/4 lbs/sq.in. The bottom tank had been dip-soldered; although no leaks had occurred during test, it is doubtful whether the joint would have stood the test of time. Adhesion in places was poor. Radiator Shutters - Ex.26648 Top Bearing Strip - the condition of this unit is a definite improvement on previous cars - wear being negligible. The Radiator Stay broke on the completion of 10,000 miles running, and was followed by the failure of the 2nd Stay, probably due to the extra strain imposed on same. continued. | ||