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).
Performance and issues with various vehicle components including brakes, propeller shaft, radiator, and exhaust.
| Identifier | ExFiles\Box 108\1\ scan0156 | |
| Date | 3rd September 1937 | |
| -8- Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}3.9.37/4/AP. Rear Brakes LOP.Gw.1562 Rear Hubs LOP.Gw.1491. Gw.308 Aluminium brake drums. Brakes lined with Ferodo M.R. linings. Apart from squeaks, which indicate that a higher lead content in the lining is required, the rear brakes were satisfactory in every way. Propeller Shaft N.S.5024 Hardy Spicer Shaft. Lock plates fitted in place of castle nuts. There was no noticeable vibration. A clonk occurred on taking up the drive for the first time after reversing, or on reversing for the first time, but did not occur again until the torque was applied in the opposite direction. This was due to the extension shaft coupling on the rear of the 3rd. motion shaft moving on its taper, and the clonk produced being transmitted to the propeller shaft. It is important that the nuts holding this coupling as well as the propeller shaft couplings should be done up really tight so that the drive is taken by the taper and not the keys. The American type lock washers were satisfactory and the flange nuts remained tight. Radiator LOP.LW.1205 Radiator Shutters LOP.LW.1095 The cooling was good. Loss of water from the overflow pipe took place at a practically steady rate, and would continue until the circulation ceased due to shortage of water. No steam valve was fitted. The shutters were satisfactory in operation. Spare Wheel Carrier LOP.LW.142 The spare wheel shake on bad roads was not excessive. Exhaust Fittings LOP.LW.1046 Exhaust blow occurred from the middle joint and on the cylinder head. This was due to the manifold distorting so that the middle flange had drawn away from the head approximately .040". The threads of the brass nuts had pulled out as a result. The special front stays of the front expansion box were not satisfactory. The silencing was up to the usual 25/30 standard and no trouble was experienced with the system. | ||