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).
Comparison test of engine power output using an Autovac fuel supply versus a test bed supply, noting power loss due to petrol starvation.
| Identifier | ExFiles\Box 40\4\ Scan370 | |
| Date | 3rd July 1933 guessed | |
| -2- engine and supply the carburetter (fitted with standard air silencer) from it. The autovac was so fitted, complete with pipe line, filters etc. and the engine was run up to full power, the BHP. being noted. The carburetter was then supplied with petrol from test bed pipe line, engine was run up to full power and BHP. noted - in this way by comparison, any loss in power due to petrol starvation is shown up. Autovac supply. R.R. S.E. large air valve carb., standard air silencer, standard long type exhaust silencer, cut out open. RPM. LOAD. C/LOAD. BHP. AIRTEMP. IND. PIPE DEP. 3000 128.0 132.2 165.5 34 3.4 2750 141.0 145.6 166.8 34 2.6 -- Test Bed supply- otherwise as above 3000 129.5 133.0 166.3 31 3.4 2750 142.5 146.0 167.2 30 2.6 The autovac level running at about 1200 r.p.m. was marked and the level when running full throttle at 2750 was marked - fall in level found to be 3/8". Apparently the suction of the pump is becoming the limiting factor under these conditions. Hs{Lord Ernest Hives - Chair}/ C.S.Steadman | ||