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).
Petrol pump performance, testing relief valve leakage and delivery rates at various speeds.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan324 | |
| Date | 29th September 1925 | |
| R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF Ms/AR/LG29.9.25. relief valve to be observed directly. The suction and bye-pass holes were then plugged up and the delivery side of the pump subjected to a head of about 10 ft. of petrol with the gears stationary. Petrol was then seen to leak by the relief valve, confirming the results of the previous test. We think that the relief valve is too large to be leak-proof against petrol, and suggest a small valve. Pump delivery at various speeds. The delivery of the pump was checked at various engine speeds with the relief valve removed, and the bye-pass plugged up, the lift being 8 ft. and the head 16 ft. R.P.M. Delivery G.P.H. (R.R.) 400 Pump begins to deliver 1400 48.6 1500 52.5 1600 56.2 1700 60.0 1800 63.1 1900 67.2 2000 70.5 2100 73.4 2200 76.5 Oil passed by petrol pump. The pump was run dry for 2 hrs. and the oil passing through the delivery pipe collected and its volume measured. contd :- | ||