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 and proposed solutions for Phantom & Goshawk oil relief valves.
| Identifier | WestWitteringFiles\O\January1926-March1926\ Scan55 | |
| Date | 13th February 1926 | |
| TO CS. FROM E.{Mr Elliott - Chief Engineer} Copy to - R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} (R.{Sir Henry Royce}, HS.{Lord Ernest Hives - Chair}, and BY.{R.W. Bailey - Chief Engineer} are crossed out) ORIGINAL PHANTOM & GOSHAWK OIL RELIEF VALVES. E1/M13.2.26 X 5205 / X 8205 (Handwritten) We have never received a customers' complaint at WW. of the oil relief valve sticking open. We have never had any trouble of this sort on any of the cars here. We have only had complaints from Derby on those cars run by Hancock on the 10,000 miles testing. We nevertheless do not minimise the fact that a car has been stopped due to loss of oil pressure, and we had in fact got a scheme in hand of a new type of valve suggested by Mr. Royce, and only delayed due to urgent aero work. We do not agree with the idea that failure occurs due to some small foreign body jamming on the seat. The valve runs normally open and a small piece of dirt would probably be washed off the seat and even if caught would not keep the valve sufficiently open to cause serious loss of pressure. We believe the trouble is most likely due to the dirt jamming under the valve guide m vanes when the valve descends. We have a proposal in hand for counterboring the existing Phantom and Goshawk relief valve guides so that the chamfered vanes always over-run the guide. We have designs in hand for a new and improved type of valve. We also a design in hand for transferring the valve unit to a more accessible position. We realise that this may result in excessive pressures in the pump when the oil is cold but think the extent of this danger can be determined experimentally in advance and may be dealt with on the suction. [STAMP: RECEIVED E.{Mr Elliott - Chief Engineer} 13 FEB 1936] | ||