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).
Issues with the exhausted boost regulator aneroid and proposing a simplified version sealed at atmospheric pressure.
| Identifier | ExFiles\Box 178\4\ img079 | |
| Date | 11th May 1932 | |
| P. From Hs{Lord Ernest Hives - Chair}/Pms. c. to Sg.{Arthur F. Sidgreaves - MD} Mor. c. to Rs.{Sir Henry Royce's Secretary} R.{Sir Henry Royce} C. to By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Pms.10/MA.11.5.32. ORIGINAL X4033 BOOST REGULATOR ANEROID. The boost regulator aneroid, which is exhausted to + 1bs{A J. Barnes - Assistant Manager}/sq.in., absolute for the purpose of eliminating temperature effects, requires to be an extremely complicated unit, calling for great accuracy of a number of variables which combine to give the balance against atmospheric pressure. This has been shown up on the 25 sets which are at present in course of construction in the Works, the extent of exhausting the bellows being found to vary considerably. The use of an aneroid sealed at atmospheric pressure would simplify the job considerably, and tests have been carried out on the test bed, in this respect. An existing aneroid being used, after being punctured and then resealed at atmospheric pressure. No balancing arrangement is necessary, but a stop, to drawing No.565, is used in order to limit the travel of the aneroid when working under slow running conditions and reduced depressions in the supercharger. The appended curve shows the results. It will be noticed that the controlled boost remains constant over the range from ground level to 10,000 ft, and return to G.L. The maximum temperature variation we could obtain on the test bed was 12°C and no temperature effect is observed, over that range. We consider that the unit at Tollerton, on Kestrel 325, should be converted to atmospheric tight as soon as possible in order to prove by flight tests, if any influence does occur due to temperature. Hs{Lord Ernest Hives - Chair}/C.H.Farmer. 1 print att: | ||