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).
Table of results for Autovac tests on a 40/50 Silver Ghost, measuring supply rates against engine demand at various fuel levels.
| Identifier | ExFiles\Box 40\4\ Scan160 | |
| Date | 1st December 1925 guessed | |
| AUTOVAC TESTS. TABLE 11. Table of results when using the old pressure pump as a means of exhausting the Autovac on 40/50 Silver Ghost. TABLE DATA: Column Headers: - R.P.M. - Average engine demand pts/hr. - Autovac supply pts/hr. for different petrol levels. - CAR ON LEVEL. 1/8 grad, 1/4 grad. - Amount of petrol in tank. - FULL. | 3/4 FULL. | 1/2 FULL. | 1.85" | 1.85" | 1.85" - Height fuel is raised. - 21.45" | 22.5" | 26.45" | 30.6" | 41" | 53" - Suction on Petrol. Inches mercury. Table Rows: RPM 500: Average engine demand 20.0, Supply pts/hr: 42.75, 44, 35.4, 29.8, 22.4, 16.6+, Suction 2.0 RPM 750: Average engine demand 27.0, Supply pts/hr: 56.75, 55.2, 51, 45.25, 34.1, 28.4, Suction 2.5 RPM 1000: Average engine demand 34.5, Supply pts/hr: 65.00, 63.4, 56.5, 53.2, 41.2, 34.5, Suction 3.1 RPM 1250: Average engine demand 42.5, Supply pts/hr: 70.25, 68.8, 63.4, 58.15, 48.9, 36.25+, Suction 3.8 RPM 1500: Average engine demand 49.0, Supply pts/hr: 70.25, 70.25, 65.3, 61.8, 50.1, 41.75+, Suction 4.1 RPM 1750: Average engine demand 55.25, Supply pts/hr: 74.7, 73.9, 69.5, 67.0, 55+, 48.0, Suction 4.4 RPM 2000: Average engine demand XX, Supply pts/hr: 79.3, 78, 75.2, 67.0, 59.1+, 51.5+, Suction 5.0 Figures marked + shew when Autovac will not supply engine requirements. H s/A.J.Lidsey. Vertical text on right edge: 8666 | ||