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 John Marston Limited regarding modifications to an Oil Cooler design.
| Identifier | ExFiles\Box 131\1\ scan0254 | |
| Date | 8th December 1936 | |
| IMPERIAL CHEMICAL INDUSTRIES LIMITED. FROM JOHN MARSTON LIMITED, WOLVERHAMPTON. [Logo: SBAC - THE SOCIETY OF BRITISH AIRCRAFT CONSTRUCTORS LTD] [Logo: THE SOCIETY OF MOTOR MANUFACTURERS & TRADERS LTD] [Logo: NATIONAL SCHEME FOR DISABLED MEN] TELEPHONE: 21481 (4 Lines) TELEGRAMS: SUNBEAM, WOLVERHAMPTON. CODES: A.B.C. 5TH & 6TH EDITIONS; BENTLEY'S. Reply to be addressed to John Marston Limited for the attention of PHAM/IE [Handwritten at top: 1280 (crossed out) 11114] 8th December, 1936. [Handwritten: Noted RM{William Robotham - Chief Engineer}/STD] Messrs. Rolls-Royce Ltd., Derby. For the attention of Mr. Steadman. Dear Sirs, We wish to thank you for your letter of the 5th December, and to assure you that all suggestions mentioned there-in have been carefully considered, and carried out so far as is practicable. Although we are of the opinion that a strip sweated to the existing side plates of the Oil Cooler would be more efficacious in preventing their bulging, we quite appreciate the difficulty to be met with the casting which is too small, and if you are not prepared to increase the inside dimensions of this casting, we advise increasing the thickness of the side plates from 18. w.g. to 16 w.g. As this alteration will require a new set of pressing tools however we will await your instructions before changing our production methods. With regard to the bottom pressing, we feel there is no need whatever for modification of the existing design. The shape of this plate makes it very resistant to pressure. In fact no serious distortion is apparent even at 500 lbs per square inch pressure. No undue strain is therefore communicated to the solder joint. Again an increase of thickness of the material would require new tools, an expense which we are confident is quite unjustified. | ||