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 The Humber Motor Co. Ltd. regarding difficulties with valve springs, inquiring about material specifications to determine if the issue is with the design or faulty material.
| Identifier | ExFiles\Box 126\2\ scan0032 | |
| Date | 15th June 1936 | |
| X1069 Exptl. Dept. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}16/KW. 15th June, 1936. - Winter, Esq., The Humber Motor Co.Ltd., COVENTRY. Dear Mr. Winter, Have you got out of your valve spring difficulty ? I would be interested to have details of your valve springs which gave trouble, including the material specification, so that we could check over whether from our experience the design is one which might be expected to be on the border line of trouble, or whether the failures are more likely to be from faulty material. Yours sincerely, | ||