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 necessary redesign of a piston to fit a patent scraper ring, requiring an alteration to the connecting rod.
| Identifier | ExFiles\Box 77\1\ scan0055 | |
| Date | 14th April 1921 | |
| CODE: "MARCONI INTERNATIONAL". TELEGRAMS: "PISTONS, READING". TELEPHONE N°1314. X.1105 ALLEN & SIMMONDS (READING) LTD PISTON & PISTON RING SPECIALISTS, AERO ENGINEERS, ETC. THAMES SIDE ENGINEERING WORKS, READING, BERKS SPECIALITIES ALLEN PATENT FRICTIONLESS PISTONS, PISTON VALVES AND ROD PACKINGS. COVERED BY 30 BRITISH PATENTS AND 50 FOREIGN PATENTS. SPECIALITIES PISTONS, PISTON RINGS AND GUDGEON PINS FOR AERO AND OTHER INTERNAL COMBUSTION ENGINES. MACHINE GUN MOUNTINGS. PLEASE ADDRESS ALL COMMUNICATIONS TO THE COMPANY NOT TO INDIVIDUALS RECEIVED 15 APR 1921 Messrs. Rolls-Royce Ltd., Nightingale Road, DERBY. 14th.April 1921 Please quote Ref. TAS{T. Allan Swinden}/LL HS{Lord Ernest Hives - Chair} Dear Sirs, With further reference to your letter of the 2nd.Inst., and our's of the 6th. our Chief Designer has now gone very carefully into this matter again, and finds that the only possible way in which we can fit our patent oblique type scraper ring is by re-designing the piston, altering the position of the gudgeon pin bosses, which will necessitate an increase of length of 3/8" to the connecting rod. We are enclosing sketch No:M.P.338, which will make clear to you the points mentioned. We shall be pleased to know if you are prepared to make a set of special connecting rods in order to test these pistons, which we should be pleased to supply free of charge, as before. We should appreciate a reply at your convenience. Yours faithfully, FOR ALLEN & SIMMONDS /READING/ LTD., B.Tull, Secretary. p.p. J.A.S. Enclo., | ||