Letter from S. Smith & Sons regarding performance issues with 'Hexane' filled thermostats and bellows.
| Identifier | ExFiles\Box 156\2\ scan0188 | |
| Date | 7th February 1939 | |
| CONTRACTORS TO ADMIRALTY, WAR OFFICE & AIR MINISTRY S. SMITH & SONS (Motor Accessories) Ltd. CRICKLEWOOD WORKS LONDON, N.W.2 TELEPHONE: GLADSTONE 3333 (20 LINES) TELEGRAMS: SPEEDOFAC, PHONE, LONDON. CABLES: SPEEDOFAC, LONDON. CODES: MARCONI, COMMERCIAL, BENTLEY'S. BY APPOINTMENT TO HIS MAJESTY THE KING BRANCHES AT PARIS, MILAN, SYDNEY, WELLINGTON AGENCIES AND SERVICE STATIONS THROUGHOUT THE BRITISH EMPIRE AND IN ALL THE PRINCIPAL COUNTRIES SHOWROOMS & DEPOTS: 179-185 GT PORTLAND ST LONDON, W.1. 26-33, COX ST LIVERY ST BIRMINGHAM 14A JACKSONS ROW DEANSGATE MANCHESTER 21, DRURY STREET GLASGOW DUBLIN & BELFAST February 7th, 1939. Please quote our reference: E.6 FGE/MM. Your Ref:- Rm {William Robotham - Chief Engineer} /FJH. {Fred J. Hardy - Chief Dev. Engineer} 7/MH. {M. Huckerby} Experimental Dept. Messrs. Rolls Royce Ltd., DERBY. Dear Sirs, We note from your letter of the 6th inst. that the water temperature is too low for your purposes when using "Hexane" filled thermostats. We will refill the three units, you are returning, with a liquid having a higher boiling point; this will not open the shutters so much. For your information the performance given by the units when "Hexane" filling is used conforms with the drawing so far as the load lifted at 90 degrees is concerned. There are variations in the free travel of the bellows at 75 degrees due to differences in stress in the bellows itself, we are trying to reduce these by the use of graded bellows. There is not much difference in the performances when loaded however. Yours faithfully, for S. SMITH & SONS (MOTOR ACCESSORIES) LIMITED. ENGINEER. To avoid delay all envelopes should be addressed to the firm. | ||
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).