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).
Letter to a carriage builder concerning a tyre pressure issue, quoting a Dunlop report.
| Identifier | ExFiles\Box 53\1\ Scan132 | |
| Date | 30th August 1923 | |
| No. H4/EF/30823. 30th August 1923. Messrs. Myers & Burnell, Automobile Carriage Builders, Davygate, YORK. Dear Sirs, We have to thank you for your letter of the 29th of August, having reference to Chassis No. 3-2H, Sir Lycett Green, Bart. We are, of course, putting the facts that you give us immediately before Messrs. Dunlop, and we are asking our Works, at the same time, to follow up the matter energetically, in order that the difficulty may be solved. With reference to the previous case on Sir Lycett Green's car, we have now received Messrs. Dunlop's report on the cover, tube and wheel, all of which were sent to them. Messrs. Dunlop's state:- "There can be no doubt but that the trouble originated in "the loss of pressure in the tube for some reason, for "there is distinct evidence that the cover has been "creeping on the rim, and this could not occur if the "pressure within the tube were adequately maintained. As "the air pressure became reduced, so the beads of the "cover lost their hold on the rim clinches, and it "attempted to travel round the rim and carry with it the "tube. This, however, was anchored at the valve and the "valve was torn from its seating. As the pressure be- "comes reduced so the beads of the cover would fall "towards the centre of the rim, and in process of creep- "ing there is a tendency for the cover to mount the rim "edge." It would appear from this, that Messrs. Dunlop consider that the pressure at some time must have fallen to 15 or 20 lbs., Contd. | ||