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 plotting the results of Autovac tests, showing possible travel distance against engine RPM under various conditions.
| Identifier | WestWitteringFiles\J\May1923\ Scan40 | |
| Date | 9th May 1923 | |
| SHEET 2 AUTOVAC TESTS DISTANCE POSSIBLE TO TRAVEL STARTING WITH AUTOVAC & FLOAT CHAMBER OF CARB FULL. FULL THROTTLE. TOP GEAR. ACTUAL RESULTS WOULD BE BELOW THESE CALCULATED RESULTS. IT IS ASSUMED FOR THESE RESULTS THAT THE LEVEL OF PETROL IN TANK IS CONSTANT & THE MILAGE IS THAT WHICH CAR WOULD DO IF SUPPLY IN MAIN TANK LASTED. CALCULATED UPON AVERAGE ENGINE DEMAND. Graph Y-Axis: MILES POSSIBLE TO TRAVEL ON TOP GEAR. Graph line data: No1, No2, No3, No4, No5 TANK APPROX 3/4 FULL. INFINITY AT 750 TANK 1/2 FULL. INFINITY AT 750. No6. GRAD 1 IN 8 GRAD 1 IN 4 TANK NEARLY EMPTY TO INFINITY AT 1000 R.P.M. ON LEVEL, TANK NEARLY EMPTY TO INFINITY AT 1500 R.P.M. Table at bottom: 250, 500, 750, 1000, 1250, 1500, 1750, 2000 R.P.M. 14.38, 21.57, 28.76, 35.96, 43.14, 50.34, 57.5 M.P.H. TOP GEAR Stamp: ROLLS-ROYCE, LIMITED. PRINT ROOM. 9 MAY. 23 | ||