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 British Thermostat Co., Ltd. regarding a disagreement over bellows measurements.
| Identifier | ExFiles\Box 156\2\ scan0046 | |
| Date | 28th March 1938 | |
| File Thermostat 1328. Telephone: SUNBURY-ON-THAMES 456 (6 LINES) Telegrams & Cables: THERMOSTAT, SUNBURY-ON-THAMES. Code: BENTLEY'S THE BRITISH THERMOSTAT CO., LTD. Makers of Scientific Instruments. DIRECTORS: COL. N. HUDSON. J.E. SHERLOCK } MANAGING. W.F.F. MARTIN-HURST L.S. SWINNERTON DYER. F.G. POPLETT. TEDDINGTON WORKS. Windmill Road, Sunbury-on-Thames, Middlesex. Your Ref: Rm{William Robotham - Chief Engineer}/Std.3/MH{M. Huckerby}: WMH/GN: March 28th, 1938. Messrs. Rolls-Royce Ltd. DERBY. Dear Sirs, For the attention of Mr.Steadman. We must apologise for the delay in replying to your letter dated March 15th which we regret to say was overlooked. We still cannot agree with your figures. Although we do not know the limits on the housing dimensions, by measurement we find that the length from the facing on the bottom plate against which the bellows bottom plate bears and the by-pass housing is 1.710". The bellows, as we sent it to you, had a free length over the plates of 1.695", which should have been 1.710" or more, but it was not possible to provide sufficient convolutions in the bellows to give this free length without these convolutions becoming solid when the unit was cold and not in its housing. You state that the bellows length over the endplates with charge released is 1.600", that is to say, at least .110" short of the correct length, but you also say on the third page of your letter that with the bellows unit in the casing and charge released there was a movement of .323" from the cold stop to the free position. The overall length of the bellows over the plates when down on the cold stop, and we have checked this | ||