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 discussing the performance and development of low pressure tyres.
| Identifier | ExFiles\Box 53\2\ Scan064 | |
| Date | 1st October 1923 | |
| Y4565 By Appointment To H.M. The King DUNLOP RUBBER Cº LTº FOUNDERS OF THE PNEUMATIC TYRE INDUSTRY. TELEGRAMS: "DUNLOPS, BIRMINGHAM." TELEPHONE No. ERDINGTON 261 (PTE. BX. EX.) EXTENSION................... STATION: CASTLE BROMWICH (MID. RY.) GOODS: TO DUNLOP SIDINGS, CASTLE BROMWICH. NEAREST CAR ROUTE: TYBURN ROAD FROM STEELHOUSE LANE TO FORT DUNLOP WORKS, CAR 63. REGISTERED OFFICES: DUNLOP HOUSE, 1, ALBANY STREET, LONDON, N.W. 1 ALL COMMUNICATIONS TO BE ADDRESSED TO THE FIRM. STAMP: FORT DUNLOP PLEASE QUOTE REFERENCE. FORT DUNLOP, ERDINGTON, BIRMINGHAM. REFERENCE: M/H.{Arthur M. Hanbury - Head Complaints} DATE: 1st October 1923. Messrs Rolls Royce Ltd. Derby. Dear Sirs, LOW PRESSURE TYRES. Re yours of the 28th. yours reference He6/LG. We note with interest that Mr Royce is pleased with the 20 H.P. tyres and also that your comparative tests are satisfactory up to date as regards speed and hill climbing. The 40/50 H.P. set of wheels went back to you last week, and we expect also to send you further set for the 40/50, as asked for in your letter of the 30th ultimo. sometime this week. In reference to Tread pattern - we shall be glad to know what difference you find as regards noise in comparing 7" with the 8" tyres already sent, as we had the impression that the 7" tyres were appreciably quieter. The next set of 8" tyres have been altered as regards Tread pattern with a view to getting longer running properties and greater silence. We would be glad if you would let us know on receipt your opinion of these tyres in this respect. As you know it is difficult to get a good non-skid pattern which will at the sametime be perfectly silent, and the different conditions set up with the Low Pressure tyre give us new problems in reference to silence and wear, and we think it will only be after extended experience that we shall get as silent a tyre as it is possible to make, in conjunction with fulfilling the requirements in other directions at the sametime. Yours faithfully. FOR THE DUNLOP RUBBER CO, LTD [Signature] | ||