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).
Test data comparing heat flow in clean vs. carbonised engines and between cast iron vs. aluminium pistons.
Identifier | ExFiles\Box 24\4\ Scan097 | |
Date | 21th August 1923 guessed | |
SHEET 5. CLEAN AND DIRTY ENGINE - CAST IRON AND ALUMINIUM PISTONS. EFFECT OF CARBON DEPOSIT ON HEAT FLOW TO COOLING WATER. COMPRESSION RATIO FOR THESE READINGS 3.9. TABLE 1: Headers: Carbonised engine, Clean engine Sub-headers: R.P.M., HP., Ht. flow to jackets. B.Th.U's. min., HP., Ht. flow to jackets. B.Th.U's. min. Row 1: 500, 21.87, 1328.4, 23.1, 1660 Row 2: 750, 32.38, 1912.5, 33.6, 2250 Row 3: 1000, 43.5, 2079.0, 45.4, 2970 Row 4: 1250, 53.9, 2608.0, 56.7, 3167 Row 5: 1500, 62.7, 2948.0, 66.2, 3402 Row 6: 1750, 69.6, 3307.0, 74.7, 3780 Row 7: 2000, 73.3, 3664.0, 77.3, 3982 HEAT FLOW WITH CAST IRON AND ALUMINIUM PISTONS COMPARED. TABLE 2: Headers: Alum. pistons., Cast iron pistons. Sub-headers: R.P.M., HP., B.Th.U's. min., HP., B.Th.U's. min. Row 1: 500, 23, 1475, 22.3, 1413 Row 2: 750, 34, 2025, 34.25, 1925 Row 3: 1000, 45.5, 2300, 45.7, 2310 Row 4: 1250, 55.5, 2780, 57.1, 2745 Row 5: 1500, 67.0, 3060, 67.2, 3100 Row 6: 1750, ----, 3390, 73.4, 3440 Row 7: 2000, ----, 3980, 97.7, 3600 Note :- Carburtter for each of these readings was the same viz. set for normal running. | ||