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 AC-Sphinx Sparking Plug Co Ltd. regarding the supply and testing of sample petrol pumps.
Identifier | ExFiles\Box 27a\2\ Scan043 | |
Date | 8th May 1931 | |
COPY THE AC-SPHINX SPARKING PLUG CO LTD. BRADFORD STREET, BIRMINGHAM. Reference NFS/NA.{Mr Nadin} BY/Cgh{W Clough}20/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} May 8th 1931. Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, Re: AC PETROL PUMPS. Further to our letter of the 22nd ult, and your reply thereto of the 6th inst., we have made up three sample pumps in accordance with our layout PE-276. These have been tested and are being despatched to you to-day. We attach hereto drawing of flow curve showing delivery of petrol at various pump speeds, which we trust you will find satisfactory. With regard to the pump samples themselves, we found that Messrs. Benton & Stone could not supply us with a plate type filter small enough to be fitted inside the bowl of the pump. We therefore approached Messrs. Zenith Carburetters Ltd., who have a plate-type filter small enough for this purpose, but when fitting their filter we found that it involved trapping some air in the filter bowl itself. This is a feature that might prove objectionable. We have therefore decided in the case of these three samples to submit them to you with our usual double mesh screen filter. This should prove no handicap in your process of testing these samples, and if your tests are successful and you subsequently decide to fit our pump as standard equipment, we could perhaps co-operate with Messrs. Benton & Stone in having a small filter specially made for the job. You will appreciate that in submitting these pumps we do not regard our layout PE-276 as ideal, due to vibration of the pump itself as well as the possibility of a slight noise emanating from this type of mounting. The risks would be entirely obviated if the pump could be mounted in accordance with our customary installation, i.e., directly on to a pad on the crankcase, with the rocker arm actuated from the camshaft. | ||