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).
Issues with jacks, brackets, gland leaks, and a hydraulic pump.
| Identifier | ExFiles\Box 129\3\ scan0075 | |
| Date | 5th February 1936 | |
| -2- Hs{Lord Ernest Hives - Chair}/Dwg.2/KW.5.2.36. Jack & Brackets. At present the front jacks are so fitted that it is impossible to remove them without firstly removing either the wings or the cross member to which the jacks are fitted. The Jacks cannot be pulled down through the brackets, because the jack caps are of larger diameter than the bracket. The rear brackets require setting back 6° in order to bring the Jacks vertical in a fully jacked position. This 6° is due to a 1½° static lean of the bracket and 4½° torque of the rear axle when jacked up. Jacks. The Jacks are strong and rigid and have withstood severe rocking when the car was jacked on Ristern Hill. Gland Leaks. The glands leaked as follows – O/S front Jack leaked slightly at bottom gland. N/S rear " " at both top and bottom glands. N/S front " " " " " " " O/S rear " " " " " " " These glands have since been removed and reported on by the D.W.S. Co., who state that the glands have been over-baked during the moulding procedure. Engine Driven Pump. Considerable development work is necessary before this pump can be put into production. Troubles experienced so far are :- (1) Hydraulic Control. It was found that the control column of oil expanded under temperature to such an extent that it took up the allowable pipe line lag and continued to form a pressure sufficient to throw the clutch into engagement. This actually happened on the road and the Jacks came down whilst the car was in motion. | ||