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 S.U. Carburetter Co. Ltd discussing pump silencing and hammering issues.
| Identifier | ExFiles\Box 149\4\ scan0025 | |
| Date | 5th October 1936 | |
| X1263 TELEGRAMS FLEXCARBUR, BIRMINGHAM. The S.U. Carburetter Co. Ltd PROPRIETORS: MORRIS MOTORS LTD LORD NUFFIELD CHAIRMAN OLIVER BODEN, O.B.E. MANAGING DIRECTOR STATION ADDERLEY PARK L.M.&S.RY East Works, Bordesley Green Road, Adderley Park, Birmingham, 8. TELEPHONE Nº EAST 1171 (6 LINES) T. C. SKINNER, M.I.A.E DIRECTOR & GENERAL MANAGER YOUR REF HS{Lord Ernest Hives - Chair}/JBD.{John B. Dixon - Fuel Systems}1/KW. OUR REF RLK/NK. DIXON Messrs. Rolls-Royce Ltd. D E R B Y. 5th October 1936. Dear Sirs, For the attention of Mr. Dixon. We are in receipt of your letter of the 3rd inst. We shall be pleased to see you any day to suit your convenience, afternoon for choice. The silencing arrangements on the large pump have certainly made the problem rather more difficult, as we obviously have to allow for more loss of stroke. Further-more Oakenstrong washers have been unsatisfactory. On the standard pump we propose to fit the washer as you know on the end of the core and therefore it will remain fairly effective even if it gets hammered down. On the high pressure pump we have been unable to get satisfactory results with the buffer in this position and therefore we have had to adopt your original suggestion of having it on the larger diameter. We have put pumps up with a 10 thou. clearance between the core and the armature and in due course the Oakenstrong washer hammers out until you get metal contact. We are now trying to get supplies of thin petrol proof canvas rubber insertion. The one pump which we have with the exception of this fault of hammering the Oakenstrong down is now quite satisfactory, and we have more confidence in it than we had when we gave you the previous sample. We have not sent this on to you as at the moment we have no other to carry out experiments on. You will remember that the pots on these were turned out of the solid and it is not convenient to put -1- | ||