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 table for Autovac supply and induction pipe depression on a 40/50 Silver Ghost at full throttle.
| Identifier | ExFiles\Box 40\4\ Scan159 | |
| Date | 9th May 1925 | |
| AUTOVAC TESTS. INDUCTION PIPE DEPRESSION. TABLE 1. Table of results with Autovac on 40/50 Silver Ghost - all readings at full throttle. TABLE DATA: | | Average engine demand pts/hr. | Autovac supply pts/hr. for different petrol levels. | Induction pipe depress. Ins.water. | Suction on petrol ins.water. | |---|---|---|---|---| | | | CAR ON LEVEL. | 1/8 grad. | 1/4 grad. | | | | | | Amount of petrol in tank. | Height fuel is raised. | | | | | R.P.M. | | FULL. | 1/2 FULL. | 1/4 FULL. | 1.85" | 1.85" | 1.85" | | | | | | 21.45" | 22.5" | 26.45" | 30.6" | 41" | 53" | | | | 500 | 20.0 | 18.53+ | 17.40+ | 13.57+ | 7.97+ | 0+ | 0+ | 12.2 | 25.4 | | 750 | 27.0 | 33.49 | 31.07 | 25.75+ | 18.27+ | 1.74+ | 0+ | 16.6 | 31.2 | | 1000 | 34.5 | 45.06 | 42.19 | 36.54 | 29.58+ | 17.12+ | 2.89+ | 21.9 | 40.1 | | 1250 | 42.5 | 54.81 | 52.54 | 46.28 | 39.85+ | 25.23+ | 9.39+ | 29.6 | 46.2 | | 1500 | 49.0 | 63.77 | 62.64 | 59.59 | 48.72+ | 35.67+ | 22.62+ | 37.3 | 54.4 | | 1750 | 55.25 | 73.29 | 71.51 | 66.12 | 58.98 | 46.98+ | 34.19+ | 46.1 | 68.8 | | 2000 | | 79.78 | 77.43 | 72.21 | 66.99 | 54.80+ | 41.76+ | | 92.0 | | Bar.mm. | | | 751 | 753 | 761 | 751 | 758 | | | Figures marked + shew when Autovac will not supply engine requirements. N.B. The above figures are taken from the report Hs{Lord Ernest Hives - Chair}3/LG9.5.25. | ||