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).
Findings from experimental testing on various vehicle component issues and proposed actions.
| Identifier | ExFiles\Box 91\1\ scan0183 | |
| Date | 1st January 1936 guessed | |
| (sheet 3) was experienced which was in all probability due to the carburetters which were the 4 R.R. type. Instructions have been issued to alter the starter motor gear ratio, the maximum amount possible without altering crankcase patterns, and a test should be carried out on this in a cold chamber in conjunction with the Stromberg downdraught carburetter. (9) Engine Vibration at 50 m.p.h. Experimental Department report that this is not present on No.1. SpectreCodename for Phantom III, which is fitted with a light flywheel. Further investigation is necessary on this item. (10) Clutch Pressure Plate Distortion after use. Evidence shows that this is partly the cause of poor clutch operation. Borg and Beck recommend that for this size of clutch the presser plate should be 50% thicker. They have not found it necessary to normalise but this may not be parallel with our requirements as we use a different material. (11) Front Suspension Lever. A failure of the stiffened type main suspension lever has occurred on the bump test. A design has been issued for a further stiffened lever and it is important that this should be manufactured quickly and tested. (12) Petrol Tank Booms. Further tests should be carried out on petrol tanks with the latest stiffened baffles; there are petrol tanks available for this. With regard to the inability to use the last few gallons of petrol on a gradient, tests have been carried out and a report is being issued. (13) Oil Relief Valve Chatters. Design have issued instructions for a non-chattering type of relief valve in accordance with the Experimental Dept's development work on this point. (14) Tyre Noise. The results of tests and also American practive show that rubber body mounting is definitely required to assist in overcoming tyre noise. An experimental car has been | ||