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).
Technical report page evaluating the performance of hydraulic brakes, steering, suspension, and electrical equipment.
| Identifier | ExFiles\Box 109\4\ scan0197 | |
| Date | 10th August 1939 guessed | |
| ( 3 ) Under these circumstances, the hydraulic front brakes are quite satisfactory and well equalised. More servo output and a better front to rear distribution is required. A more satisfactory seal for the servo than adhesive tape is required. STEERING. No trouble has been experienced apart from the breakage of the lock stop in the box reported. The reactions referred to when the front tyres became unevenly worn are not as bad as on Wraith or Phantom III. with tyres similarly worn. The front tyre wear has been considerably improved by balancing the wheels. The best all round results were obtained with 7.50-16 Dunlop tyres on 5.1/2" rims. Special construction tyres for 6" rims have yet to be tried. SUSPENSION. The ride is generally good, the final quality being determined by the functioning of the front dampers. These have been variable due to dirt in the main valves which is very difficult to eradicate. The unlubricated rear springs with interleaving are not yet satisfactory for production. Further development work in progress. The front suspension parts are standing up well on the larger car, but some detail attention to the centralising of the silentbloc bearings has been called for. Experiments are in progress on the radiator mounting which is not yet satisfactory. ELECTRICAL EQUIPMENT. This is generally satisfactory. Some trouble was experienced with the dynamo commutator at 14,000 miles, but some trouble of this kind is usually experienced at this mileage under the conditions of sustained high speed. The fault was easily rectified and is not serious. The Lucas screen wipers are not satisfactory, nor are the windtone horns, which have given frequent trouble and which also fell off due to breakage of the I.B.A. fixing bolts, an old trouble. | ||