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).
Performance chart for a B.V. carburetion system, comparing ideal vs actual fuel consumption at full and part throttle.
| Identifier | ExFiles\Box 97\2\ scan0214 | |
| Date | 1st May 1941 | |
| CARBURATION. B.V. SYSTEM COMPLETE. TEST N°2. B III N°4 UNIT MAY 1941. PTS/BHP/HR .7 .6 .5 FULL THROTTLE 'D' NEEDLES 'E' NEEDLES IDEAL 500 1000 1500 2000 2500 3000 3500 4000 PART THROTTLE CONSTANT SPEEDS PTS/HR. 80 70 60 50 40 30 20 10 0 'D' NEEDLES 'E' NEEDLES 4000 RPM 3000 RPM 2000 RPM 1000 RPM B.H.P. 0 20 40 60 80 100 120 ------ = IDEAL. - - - - = ACTUAL. NOTE. THE "IDEAL" LINE IS THE WEAKEST MIXTURE TO JUST MAINTAIN MAX. POWER, ADJUSTED AT EACH SPEED ACCORDINGLY. C.T.S. | ||