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).
Set of graphs showing the effects of ignition advance, axle ratio, and engine temperature on petrol consumption.
| Identifier | ExFiles\Box 147\5\ scan0086 | |
| Date | 24th November 1925 | |
| EFFECT OF IGNITION ADVANCE ON PETROL CONSUMPTION. WATER TEMP. 80°C. AXLE 15x52 SPEED 30 M.P.H. TYRE PRESS. 50 LBS/D.{John DeLooze - Company Secretary}" MIXTURE CONTROL CENTRAL TYRES. STANDARD Graph 1: Title: IGNITION ADVANCE. Y-Axis: M.P.G. PET. CONS. (13 to 17) X-Axis: IGNITION ADV. DEGREES BEFORE T.D.C. (20° to 60°) EFFECT OF CHANGING FROM A 15 TOOTH TO A 17 TOOTH AXLE ON PETROL CONSUMPTION WATER TEMP. 80°C TYRE PRESS. 60LBS/D" MIXTURE CENTRAL TYRES. STANDARD Graph 2: Title: AXLE RATIO Y-Axis: M.P.G. PET. CONS. (14 to 22) X-Axis: ROAD SPEED M.P.H. (10 to 40) Data Lines: 17 x 52 (3.05-1), 15 x 52 (3.47-1) EFFECT OF ENGINE TEMP. ON CONSUMPTION. AXLE 15x52 SPEED 30 M.P.H. MIXTURE CONTROL. CENTRAL TYRE PRESS. 50 LBS/D" TYRES. STANDARD Graph 3: Title: COOLING WATER TEMP. Y-Axis: M.P.G. PET. CONS. (13 to 17) X-Axis: TOP WATER TEMP. C.° (100 to 70) Top Right Corner: (3) Bottom Right Stamp: TEST WIT ROOM, 24 NOV 1925 DERBY. | ||