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 discussing spring production methods, specifications, and performance testing.
| Identifier | ExFiles\Box 52\2\ Scan162 | |
| Date | 16th November 1927 guessed | |
| - 2 - the whole method by which the spring itself was evolved by our American Co. There are certain features with regard to the method of producing the top plate and the grinding all over of the secondary plates which need not be conformed to, but the shape of the plate, particularly the form of the ends of each secondary plate, must be strictly adhered to and carefully produced to drawing as this form represents one of the main factors in regard to the improved performance of the spring. You will remember that this particular type of spring gave a minimum of 39 hours as against 19 hours for your chrome vanadium springs when tested at the same time on our bumping machine, and it is our intention to put the springs at present under discussion as soon as they are produced under a similar test in order to see whether springs made by yourselves will produce as good results as given by those made by our Associated Co. If there is any further information you require on this subject, will you kindly let me know and I will let you have the information by return. Yours faithfully, TECHNICAL PRODUCTION ENGINEER. FOR ROLLS-ROYCE LIMITED. | ||