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).
Graph showing horsepower absorption versus adiabatic efficiency for a geared supercharger on an 1800 cubic inch engine.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan058 | |
| Date | 13th November 1930 | |
| HORSE POWER ABSORBTION OF GEARED SUPER CHARGER FOR 1800 CUB INCH ENGINE. BASED UPON: 30" BAROMETER 92% GEAR EFFICIENCY ΔP CARBURETTOR = 2" Hg T₁ = 500° F 1.45 LBS PER SEC. H.P. 140 120 100 80 60 40 20 % ADIABATIC EFFICIENCY 30 40 50 60 70 80 DISCHARGE PRESSURE 15" Hg 12" Hg 9" Hg 6" Hg RUDOLPH BIRMANN M.E. TRENTON N.J. 11-13-30. | ||