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).
Testing wheels and nuts on a 20 HP experimental car to resolve a slackness issue.
| Identifier | ExFiles\Box 159\7\ scan0088 | |
| Date | 3rd December 1923 | |
| COPY COPY OF TECHNICAL DEPT'S REPORT Monday 3rd December.1923 The 20 h.p. Rolls Royce experimental car which came to these Works this morning was re-fitted with the same wheels by passing the drift through the wheel hub a varying number of times until every wheel could be pushed home on all 4 inners without difficulty and to the satisfaction of Mr. Maddocks, of Messrs. Rolls Royce's Experimental Department. Mr. Maddocks had explained that the near side front wheel had at one time been found to be slack (although the wheel did not squeak) in spite of the nut being tightened hard home, and he found that the nut was tight on the thread and was not nipping the wheel between the cones; consequently all the nuts were checked by counting the number of turns until the nut or wheel was tight with the wheel on and off the hub, and it was found that in one case there was hardly any thread at all to spare before the nut was tight in the inner, and in all cases there were insufficient threads there. The four nuts originally produced for the Austro-Daimler were therefore tried, and it was found that in all cases these gave 2 to 3 threads spare, so that the car left with these fitted. While the Car was here, we also tested the wheels to see whether the cone on the inner end would jam. This was tried both by tightening the nut very hard, and also by sharply tapping the flared end of the hub and tightening again, but the wheel could in each case be removed by one sharp tug. | ||