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 Nash & Thompson Ltd. detailing a fix for an engine 'pinking' problem by modifying the spark plug holes.
| Identifier | ExFiles\Box 143\2\ scan0184 | |
| Date | 25th June 1941 | |
| 1204 NASH & THOMPSON LIMITED DIRECTORS A.{Mr Adams} FRAZER-NASH, M.I.A.E., A.M.I.MECH.E. E.{Mr Elliott - Chief Engineer} GRATTAN THOMPSON C. B. LOWE ENGINEERS CONTRACTORS TO H.M. GOVERNMENT Telephones: ELMBRIDGE 5700/6 OAKCROFT ROAD TOLWORTH, SURREY YOUR REF. Rm.{William Robotham - Chief Engineer}3/ET. OUR REF. AFN/MV 643/A/Ro.{C. C. Rose - Export Manager} 25th June, 1941. W.A.Robotham,Esq., Rolls-Royce Limited, DERBY. Dear Mr.Robotham, Many thanks for your letter of the 22nd instant. I think we have now got over the trouble. What we did was to remove that portion of the thread in the sparking plug holes which is not covered by the plug and to round off the sharp corners where these holes join the cylinder head and we are now getting no more "pinking" than one would expect with pool petrol. Thanking you very much for the trouble you have taken, Yours sincerely, A.{Mr Adams} FrazerNash p.a. to AFN. | ||