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).
Design of a die-cast oil relief valve for the 'Buzzard' aero engine.
| Identifier | WestWitteringFiles\E\July1920\ Scan8 | |
| Date | 24th July 1920 | |
| To En. from E.{Mr Elliott - Chief Engineer} Copy to C.J. H.S. EFC. X.4103 ORIGINAL. E C 24 JUL /20. RECEIVED RE OIL RELIEF VALVE - 'BUZZARD'. We send you herewith drawing No. Lec.1251 shewing the above. You will notice that we are using two oil pressures, obtained in the manner peculiar to our aero engines, by means of two relief valves. These relief valves are enclosed in an aluminium die-cast casing. We shew a sketch on the drawing illustrating some dies made up in a way that would suit the design of the casting. The die is split so that the valve casing is withdrawn along its vertical axis. The interior of the valve casing is die-cast, but under-cutting operations will be required in the machining to provide an oil annulus around the low pressure valve, and a recess for threading round the high pressure valve. We do not, of course, suggest that the die makers should be tied down to the method shewn. The main oil connection from the pump is shewn, and the main oil duct through the wheelcase, together with the joint to the crankcase. Would you kindly instruct the necessary details. We hope next to send you the oil pump itself. E.{Mr Elliott - Chief Engineer} 4103 | ||