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 issues and potential improvements on various car components.
| Identifier | ExFiles\Box 81\1\ scan0188 | |
| Date | 19th September 1917 guessed | |
| -2- attribute most of this due to increase in compression. On the old cars the amount of compression we could run with was decided by detonations. 7.CA with the 4.33 compression ratio, does not detonate worse than the old cars. We have for some time used two stages of compression, this should be continued. High compression for fast touring cars, low compression for covered cars. X.762. 3. Shock Absorbers. We must fit shock absorbers similar to Truffault, we consider the advantages gained by them are most marked. X.2938. 4. Lightened Valves. with 30° seats made of chromium steel. 7.CA has run 3000 miles with these valves, and they are in perfect condition. We consider a car should run 10,000 miles without needing attention. X.3082. 5. Wiring. We consider it is essential that we should fit a proper scheme of wiring for the starter motor and fighting dynamo lamp and Klaxon. 6. Slipper wheel. The weight and diameter of the slipper wheel could be reduced. 7. Balance weights. should not be fitted. We have now had a number of repair engines in which have been fitted balance weights. There is no noticable difference in the wear of bearings or shaft. X.3129. 8. Coil. With the starter we can use a non- trembler coil. The ignition will be more reliable and require less attention. X545. 9. Under shields. These are continually breaking, especially the front one. It is evident that the bent aluminium will not stand the distortion of the frame at that point. We have no car at present which we consider is sufficiently good to go to America as a sample after the war chassis. The only two cars we know of available are, 7.CA and 49.CB but both of these cars are doing most useful work at present. We do not consider they can be spared. X.682. 7.CA. This is five years old although a number of new parts have been added, the frame, axle tubes, radiator, bonnet, S96L (cont'd) S 11 0427 V 892 N H | ||