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 The Light Production Co. Ltd. discussing the performance of Aerolite Pistons in relation to horsepower and oil temperature.
| Identifier | ExFiles\Box 86\2\ scan0132 | |
| Date | 6th November 1933 | |
| pu 36 THE LIGHT PRODUCTION CO. LTD. PROPRIETORS OF THE LONDON PISTON RING CO. LTD. CHAIRMAN & MANAGING DIRECTOR: M.{Mr Moon / Mr Moore} V.{VIENNA} ROBERTS. DIRECTORS: C E GEORGE, WM THIRTLE. ENGINEERS 60/66, ROCHESTER ROW, WESTMINSTER, S.W.1. ENG. TELEPHONE: VICTORIA 0671. 5 LINES. WORKS & GOODS ADDRESS: 61/67, GREENCOAT PLACE, WESTMINSTER, S.W.1. TELEGRAMS: INLAND NAPOLEONIC, SOWEST, LONDON. FOREIGN NAPOLEONIC, LONDON. CODES: A.B.C. 5TH. EDITION. OUR REF. CHB/IR All communications to be addressed to the Company. YOUR REF. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}13/KT. ON ADMIRALTY, WAR OFFICE & AIR MINISTRY LISTS. 6th November 1933. Messrs. Rolls Royce Ltd., Experimental Dept., DERBY. Dear Sirs, For the attention of W.A.Robotham Esq. We are obliged by your communication of the 1st, and are pleased to note that there is a suggestion of an increase in horse power with Aerolite Pistons. We shall be glad to receive further information on this point when you have tested the pistons which have been ground to the latest form. With regard to the question of oil temperature, we should not expect you to experience any reduction in this respect from the use of Aerolite Pistons. It would appear, from the experiments conducted by various authorities, that the remaining portion of the combustion chamber heat which is not dissipated in the water jacket from the rings,-namely about 20% of the total, - one half of this is transmitted by the skirt to the water jacket, and the remaining half taken by conduction and convection to the oil and air in the crank case. We see no reason why this ratio should be any different in the particular case under review from that which obtained before the fitting of Aerolite Pistons. Undoubtedly, the pressure of the split skirt piston would result in the skirt generally running at | ||