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 concerning the stress range analysis of experimental road springs.
| Identifier | ExFiles\Box 106\1\ scan0377 | |
| Date | 4th November 1935 | |
| THOS FIRTH & JOHN BROWN LTD INCORPORATING THE WHOLE OF THE UNDERTAKING OF THOS FIRTH & SONS LTD AND THE STEEL BUSINESS PREVIOUSLY CARRIED ON BY JOHN BROWN & CO LTD ATLAS & NORFOLK WORKS SHEFFIELD.1 Telephones: ATLAS & NORFOLK WORKS SHEFFIELD 20081 (11 LINES) TINSLEY WORKS SHEFFIELD 41193 SCUNTHORPE FOUNDRY SCUNTHORPE LINCS 22 Telegraphic Addresses: FIRTH SHEFFIELD ATLAS SHEFFIELD London Office 8, THE SANCTUARY WESTMINSTER, S.W.1 Telegraphic Addresses MESMERIC, PARL, LONDON ALDWARKE, PARL, LONDON Telephone Number 8310 VICTORIA Codes: PRIVATE A.B.C 6TH EDITION, BENTLEYS 1912 & 1929, LIEBERS, LOMBARD, MARCONI, WESTERN UNION 5 LETTER REGISTERED OFFICE ATLAS WORKS, SHEFFIELD YOUR REFERENCE Hs{Lord Ernest Hives - Chair}/LES/12/KW. Exptl. Dept. OUR REFERENCE WHICH PLEASE QUOTE HWP/37/35. Spring Dept, Tinsley. 4th.November.1935. Messrs.Rolls-Royce Ltd., Nightingale Road, DERBY. ROAD SPRINGS. Dear Sirs, We thank you for your letter of 1st inst., and note that you were interested in the 2. sets of Low Rating 25.h.p. Springs F.61003 (Front) and F.61009 (Rear), which we sent to you for Experimental purposes on 11th October. The range of stress in these springs was as follows:- F.61003. (Front) To the Loaded position - 43.5 Tons per square inch. " Max. Bump " - 63.0 " " " " F.61009. (Rear) To the Loaded position - 34.4 Tons per square inch. " Max. Bump " - 50.2 " " " " Figures which are higher than any type or make of Spring so far supplied to you - the nearest approach being the 2. - 17 plate experimental 40/50. h.p. Front springs despatched to you on 9.2.35. to your order No.76760 of 21.1.35 - and in which the deflection for a load of 1200 lbs was 10 inches - range of stress to the Loaded position 43.6 tons per square inch, and to the Max Bump position 61.1. tons per square inch. continued overleaf...... | ||