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 comparing engine energy distribution, power, consumption, and heat loss at different compression ratios.
| Identifier | ExFiles\Box 16\2\ Scan059 | |
| Date | 5th September 1923 | |
| Top Left Graph (Sheet 1): Title: ENERGY DIAGM 40-50 R.R COMPD RATIO 4:4 Reference: SEE SHEET 1 Y-Axis: % OF INITIAL PETROL ENERGY. X-Axis: R.P.M Legend: LOSSES THRO', -COOLING WATER., EXH. GASES, RADIATION, CHARGING WK., INDICATED TH EFFCY, PISTON POWER, MOTOR FRN, TH EFFICIENCY Bottom Left Graph (Sheet 2): Title: ENERGY DIAGM OF THE 40-50 R.R. COMPD RATIO 3:9 Reference: SEE SHEET 2. Y-Axis: % OF THE INITIAL PETROL ENERGY. X-Axis: R.P.M Legend: LOSSES THRO', -COOLING WATER, EXH. GASES, RADIATION, CHARGING WK., INDICATED TH EFFCY, PISTON POWER, MOTOR FRICTION, TH EFFICIENCY Center Graph (Sheets 1 & 2): Title: 40-50 R.R. POWER & CONSUMPTION WITH HIGH & LOW COMPRESSION ENGINES. Reference: SEE SHEETS 1 & 2. Left Y-Axis: B.H.P. Right Y-Axis 1: PTS/B.H.P./HR. FUEL Right Y-Axis 2: FRICTION LOSS IN HORSE POWER. X-Axis: R.P.M. Line Annotations: COMP RATIO 3:9, PETROL CON., COMP RATIO 4:4, PISTON POWER, HIGH COMP PISTON POWER., B.H.P. HIGH COMP., B.H.P. LOW COMP ENG., COMPRESSION RATIO 3:9, FRICTION LOSS Top Right Graph (Sheets 3 & 5): Title: 40-50 R.R. Subtitle: HEAT LOSS TO COOLING WATER WITH HIGH & LOW COMPN ENGINE Details: HIGH COMPN = 4:4, LOW COMPN = 3:99, IGNITION & MIXTURE NORMAL. Reference: SEE SHEETS 3 & 5. Y-Axis: HEAT FLOW TO WATER. B.TH. U's/MIN. X-Axis: B.H.P. Line Annotations: 1/2 LOAD LOW COMP, 1/2 LOAD HIGH COMP, FULL LOAD LOW COMP, FULL LOAD HIGH COMP, HT. FLOW CARBONISED ENGINE. R = 3:99 FULL LOAD. Bottom Right Graph (Sheet 4): Title: 40-50 R.R. LOW COMP. 3:9 Subtitle: HT. LOSS TO CYL. WATER & VARY OF POWER WITH MIX. STRENGTH. Reference: SEE SHEET 4 Left Y-Axis: HEAT FLOW TO JACKETS B.TH. U's/MIN. Right Y-Axis: B.H.P. X-Axis: PETROL PINTS / HOUR. Annotations: SPEED 500 R.P.M, HP FOR VARYING MIX STRENGTHS, HT LOSS TO CYL JACKETS, MIX. RANGE ON CARB CONTROL Stamps: 1) ROLLS-ROYCE Limited, FRONT ROOM, -2 JUN 1923, DERBY 2) A.C.L., 5.9.23 3) 44. E.L.E.E | ||