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).
List of proposed alterations for the American market car, page 2.
| Identifier | ExFiles\Box 81\2\ scan0038 | |
| Date | 2nd December 1919 | |
| X.4335 X4616 Alterations proposed for American RR. Car Contd. -2- by.December. 2nd. 1919. Perhaps the spring camber might be increased a little also. About 1" more clearance seems desirable. (b){ Inch-size ball bearings are not obtainable in the U.S. { except as special orders at high prices and with doubtful { delivery dates. Some of the inch bearings are still used { on the car. We can obtain millimetre sizes. No. We would it be possible to substitute millimetre sizes. ( with the use of liners? (3){ Dust covers over the valve stems are suggested, to { prevent wear and sticking of the valve stems. It is found that wear of the valve stems upsets the { distribution of mixture to the end cylinders on cars which { have run 2 or 3 years. On the new imported cars the valve guide has been cut { down at the top to leave a freer gas passage. plates most suitable - former length of guide ? The dust covers might be telescopic individual covers, { or a plate over each block of three cylinders, as discussed { last January. (4){ The suggestion is made that fabric universal joints be tried between the engine and the gearbox, to do away with the wear and slackness which at present occurs after about 12 months' running. "Thermoid" joints made in the U.S. are extensively used and believed to be good. (5) X819 Could the floorboard slots be reduced ? X.4335 Gas or hot air from the engine getting through these slots is particularly undesirable in Sedan (inside drive) bodies, which are growing in popularity. Several cars here avoid these slots altogether and only have a small hole in the floorboard sufficient to pass the stem of the foot pedal. We seem to get a lot of hot air into the driver's seat, as compared with smaller cars, because of the extension of the undershield so far to the rear, which causes a slight air plenum to exist under the front floorboards. On open touring cars in winter time it is often desirable to have hot air from the engine escape into the scuttle dash. This could be arranged for by a Contd. W W 382V (100) (2-18) 100 | ||