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).
Vehicle component testing, discussing issues and proposed standardisation for the fan, damper, gearbox, axle, and brakes.
| Identifier | ExFiles\Box 5\1\ 01-page165 | |
| Date | 4th July 1933 guessed | |
| -2- I assume that it is definitely proposed to employ a thermostat without radiator shutters as on the Bentley. FAN. LOB.EB189. Are you proposing to standardise this fan in spite of the fact that the water can come up to the boiling point when the car is stationary long enough with the engine running ? Would not the condition be undesirable when having to use such a car in the summer in London ? LOW INERTIA DAMPER. LOB.E.54745. When the ferodo discs had been fitted and run for a period of 9,000 miles the half-crankshaft period became noticeable, and the slipping load had dropped from 11 to 5 1/2 lbs. at 17" radius. How does this compare with the results obtained with the standard low inertia damper, because this engine period, if too irritating at about 48 m.p.h. is a very undesirable condition to arise. GEARBOX. The operation of the gearbox and new second-gear appears now to be very satisfactory, and to give no trouble with gears coming out of mesh. I hope means is being provided to prevent oil leaking through the bearing of the footbrake-shaft on to the servo mechanism. REAR AXLE. Although a slackness in the drive appears to have developed at a mileage of 4,600, you do not seem to consider that there is call for any modification of design in view of the small increase of such slackness which has developed during the mileage. FRONT AND REAR BRAKES. Is it proposed to standardise the Amre linings to the brake-shoes ? These appear to have given very good results, whereas the ferodo linings tested subsequently caused bad ridges to be worn on the brake-drums. Also the steel shoes appear to be an advantage. It is not clear whether you consider the 24% additional front braking is likely to be too much in practice having regard to the tendency to increase wear, and gradually becoming more effective in front. HYDRAULIC DAMPERS. The operation of these appears to have been good, other than continual trouble with oil leakages from the glands. This however appears | ||