Table of results from Autovac tests on a 40/50 HP Silver Ghost using an old pressure pump.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan243 | |
| 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 HP. Silver Ghost(1907 40/50 historic RAC 15,000 miles trial). | | | Autovac supply pts/hr. for different petrol levels. | | | | | | Suction on petrol. ins.mercury | |---|---|---|---|---|---|---|---|---| | | | CAR ON LEVEL. | | | 1/8 grad. | 1/4 grad. | | | | R.P.M. | Average engine demand pts/hr. | Amount of petrol in tank. | | | Height fuel is raised. | | | | | | | FULL. | 1/2 FULL. | 1/4 FULL. | 1.85" | 1.85" | 1.85" | | | 500 | 20.0 | 42.75 | 44 | 35.4 | 29.8 | 22.4 | 16.6* | 2.0 | | 750 | 27.0 | 56.75 | 55.2 | 51 | 45.25 | 34.1 | 28.4 | 2.5 | | 1000 | 34.5 | 65.00 | 63.4 | 56.5 | 53.2 | 41.2 | 34.5 | 3.1 | | 1250 | 42.5 | 70.25 | 68.8 | 63.4 | 58.15 | 48.9 | 36.25* | 3.8 | | 1500 | 49.0 | 70.25 | 70.25 | 65.3 | 61.8 | 50.1 | 41.75* | 4.1 | | 1750 | 55.25 | 74.7 | 73.9 | 69.5 | 67.0 | 55 * | 48.0 | 4.4 | | 2000 | | 79.3 | 78 | 75.2 | 67.0 | 59.1* | 51.5 * | 5.0 | Figures marked * shew when Autovac will not supply engine requirements. Hs {Lord Ernest Hives - Chair} /A.J.Lidsey. | ||
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).