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 from Dunlop Rubber Co. Ltd. regarding a chart showing the increase in effective diameter of a tyre at high speed.
| Identifier | ExFiles\Box 53\2\ Scan247 | |
| Date | 22th September 1926 | |
| X4585. DUNLOP RUBBER CO.,LTD. TELEGRAPHIC ADDRESS: "DUNLOPS, BIRMINGHAM" TELEPHONE: BIRMINGHAM CENTRAL 4108 P.B.E. 25 LINES YOUR REF: HS{Lord Ernest Hives - Chair}/RML/LG. OUR REF: AH/CDL/R.{Sir Henry Royce} FORT DUNLOP ERDINGTON BIRMINGHAM Sept.22nd.1926. Expl.Dept. Rolls-Royce,Ltd. Derby. Dear Sirs, In reply to your letter of the 21st inst. of the above reference, we are sending you herewith a chart showing the increase in effective diameter of a 33 x 6.75 tyre at speeds up to 100 m.p.h. The load on the tyre was 1,120 lbs., and this is the biggest load we are able to obtain on the machine we used. The inflation pressure was 30 lbs/sq.in. With reference to the large section inner tubes, we hope to be able to let you have these at the beginning of next week. Yours faithfully, A Healey FOR THE DUNLOP RUBBER CO.LTD. Enc. | ||