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).
Diagnosis and resolution of a low-speed steering wobble.
| Identifier | ExFiles\Box 28\4\ Scan135 | |
| Date | 25th January 1915 guessed | |
| C O P Y. H4/FB8415. Re Whiteley 2G15E. N-W. Wor.{Arthur Wormald - General Works Manager} We have in the above car another aggravated case of steering wobble at low speed ( about 12-15 m.p.h.). This car is fitted with 7" Palmer Tyres and has run for some time perfectly well. The owner brought it in himself recently and the wobble was as bad as any I've seen. 1. We have since tried all the methods and adjustments known to us to cure it, even going the length of fitting new pins and bushes to pivot axles, new.ball bearings to o/s. front wheel. The result was nil. 2. We then dismantled the steering gear and took up all slack and increased pivot lean. Very slight improvement. (We tried a run with Michelin tires and found steering perfect) 3. Further increase of pivot lean and cross and side steering tube joints tightened still further. No improvement on No.2. 4. As an experiment the pivot lean was altered to lean forward absolutely against all standard practice. Result no great improvement. 5. Forward lean slightly increased. Result no further wobbling at all. The lock and track was kept correct throughout all tests. The pivots have now a forward lean of .200". The owner has written to express his satisfaction, but remarks casually that the steering wobble no longer returns. | ||