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 Zenith Carburetter Co. Ltd. regarding a test plant for carburetters.
| Identifier | ExFiles\Box 122\4\ scan0155 | |
| Date | 15th June 1938 | |
| The ZENITH CARBURETTER CO. LTD HONEYPOT LANE STANMORE MIDDLESEX ADJOINING QUEENSBURY UNDERGROUND STATION CARS DRIVEN BY OUR STAFF ARE AT CUSTOMERS OWN RISK AND RESPONSIBILITY. TELEGRAMS: ZENICARBUR.PHONE. LONDON. CODE: A.B.C. 5TH EDITION ALSO AT LYONS, PARIS, DETROIT, TURIN, BERLIN. TELEPHONE: WORDSWORTH 2213 15th June 1938 Your ref: Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden}17/JH Messrs. Rolls-Royce Ltd., DERBY. Dear Sirs, TEST PLANT FOR CARBURETTERS Further to your letter of the 8th inst., reference as above, we now have pleasure in enclosing herewith Blue Print of general arrangement and certain details relative to our carburetter blowing plant. Drawing No.010658 shows the general layout of the plant, and the various details in connection with the orifice box and with the hood under which the carburetter is tested, are shown on the drawings mentioned. We also enclose details of the orifice holders which are attached to the sides of the orifice box. The orifices themselves are made of planished sheet 1/32" in diameter, with the edges of the orifices machined dead square. The orifices range from ½" in diameter up to 2" in diameter, and they are held in position in the orifice holder by grease which is smeared round the outer edge of the orifice after it has been put into position. The orifice box is connected to the carburetter test stand by means of a blank inch steel pipe made perfectly airtight, whilst the exhaust from the test hood is connected to the pump by means of a steel pipe of the same size, the flow through the carburetter being controlled by a Hopkinson gate regulating valve. Between the latter mentioned valve and the hood of the carburetter there is located a balance valve, (located on a blank inch pipe,) which pipe is connected to open atmosphere. The purpose of this balance valve is to enable one to adjust the depression to 18", or thereabouts, of mercury for slow running position of the | ||