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).
Series of graphs showing the effects of ignition advance, axle ratio, and engine temperature on petrol consumption.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan157 | |
| Date | 18th November 1929 | |
| EFFECT OF IGNITION ADVANCE ON PETROL CONSUMPTION WATER TEMP. 80°C. AXLE 15 x 52 SPEED 30 M.P.H. TYRE PRESS. 50 LBS/SQ. MIXTURE CONTROL CENTRAL TYRES STANDARD Graph 1: IGNITION ADVANCE. Y-Axis: M.P.G. PET. CONS. (13-17) X-Axis: IGNITION ADV. DEGREES BEFORE T.O.C. (20°-60°) EFFECT OF CHANGING FROM A 15 TOOTH TO A 17 TOOTH AXLE ON PETROL CONSUMPTION WATER TEMP. 80°C TYRE PRESS. 60 LBS/SQ. MIXTURE CENTRAL TYRES STANDARD Graph 2: Y-Axis: M.P.G. PET. CONS. (14-22) X-Axis: ROAD SPEED M.P.H. (10-40) Annotations: AXLE RATIO, 17 x 52, 15 x 52, 3.06=1, 3.47=1 EFFECT OF ENGINE TEMP. ON CONSUMPTION AXLE 15 x 52 SPEED 30 M.P.H. MIXTURE CONTROL CENTRAL TYRE PRESS. 50 LBS/SQ. TYRES STANDARD Graph 3: COOLING WATER TEMP. Y-Axis: M.P.G. PET. CONS. (13-17) X-Axis: TOP WATER TEMP. C.° (100-70) Stamp: ROYCE, LIMITED PRINT ROOM 18 NOV 1929 DERBY. | ||