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).
Test results for various fuel pumps' ability to deal with vapour and the effects of temperature.
| Identifier | ExFiles\Box 149\4\ scan0017 | |
| Date | 2nd October 1936 | |
| -4- Hs{Lord Ernest Hives - Chair}/JBD.{John B. Dixon - Fuel Systems}14/KW.2.10.36. A third series of tests were made to ascertain the ability of the pumps to deal with vapour when hot, heated air being employed for convenience. A suction head of 18" petrol and a delivery pressure of 6" petrol was employed, the time taken to displace 7 pints of water being used for comparison. Standard Pump. A rise in temperature from 35°C. to 85°C. caused an increase in the time to deliver 7 pints air of 5.1/5 seconds. Standard Pump, Shortened Stroke - the increase was 9 secs. Standard Pump with G.3 Diaphragm. The time decreased by 1 sec. no doubt owing to the material being rather stiff when cold and becoming more flexible with heat; also the suction head increased owing to the rise in delivery, and it was not possible to reduce it during the test. Standard Pump with G.1 Diaphragm. Temp: Pump & Air. Suction Head Delivery Time °C. Inches Petrol Secs. _________________________________________________________ 35 14 45.1/5 45 13 45.3/5 52 13 46.2/5 62 12 46.2/5 75 12 49.2/5 85 12 49.2/5 | ||