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 modifications to Piston No. C.140 for an experimental run.
| Identifier | ExFiles\Box 87\2\ scan0034 | |
| Date | 1st April 1935 | |
| TELEPHONE: VICTORIA 0671 (5 LINES). CODES: A.B.C. 5TH EDITION. ALL COMMUNICATIONS TO BE ADDRESSED TO THE COMPANY. ON ADMIRALTY, WAR OFFICE AND AIR MINISTRY LISTS. THE LIGHT PRODUCTION CO. LTD PROPRIETORS OF THE LONDON PISTON RING CO. LIMITED. TELEGRAMS: INLAND, NAPOLEONIC, SOWEST, LONDON. FOREIGN, NAPOLEONIC, LONDON. CHAIRMAN & MANAGING DIRECTOR: M.V. ROBERTS. DIRECTORS: C.E. GEORGE. WM. THIRTLE. ENGINEERS 60/66, ROCHESTER ROW, WESTMINSTER, S.W.1 WORKS AND GOODS ADDRESS: 61/67, GREENCOAT PLACE, WESTMINSTER, S.W.1. OUR REF. JB/IR YOUR REF. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}7/KW. 1st April 1935. Messrs. Rolls Royce Limited, Experimental Dept., DERBY. Dear Sirs, For the attention of W.A.Robotham Esq. We are pleased to note from your communication of the 28th that our Piston No. C.140 will be suitable for your experimental run, with certain modifications. We are afraid that to machine .040" off the crown would leave the crown too thin for a piston of this diameter. The best way to deal with it, if the compression height must remain unaltered, is to run a spot of wax in the corebox and make some cores .040" less on the inside dimension, at the same time that we are making cores for the standard C.140, and thus run off some special castings for the job. This will keep the gudgeon pin hole in the centre of the bush and keep the general proportions of the piston right. If you would be good enough, therefore, to let us have the order for the fourteen pistons you require, complete with gudgeon pins and rings to suit, the writer will see that you have the pistons at the earliest possible moment. We must express our very sincere appreciation of your mentioning our piston at | ||