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 Inlet and Exhaust Valve B.M.E.P against Engine R.P.M, showing the effect of varying tappet clearances.
| Identifier | ExFiles\Box 13\2\ 02-page095 | |
| Date | 12th June 1931 guessed | |
| SHEET 1 EFFECT OF VARYING TAPPET CLEARANCE P.V. UNIT VALVE LIFT SCH. 1065 4.9 COMP RATIO OPEN EXHAUST CAMS E.32381 INLET VALVE B.M.E.P (Axis values: 85, 90, 95, 100, 105, 110, 115) ENGINE R.P.M (Axis values: 750, 1000, 1500, 2000, 2500, 3000) EX VALVE M.E.P (Axis values: 85, 90, 95, 100, 105, 110) Plot line labels (Tappet Clearances): .040 .030 .020 .006 .007 CLCE Timing Diagrams: At 1000 RPM: .020 CLCE; IN .256; EX .257; Values: 58, 18, 18, 57 At 1500 RPM: .050 CLCE; IN .295; EX .293; Values: 53, 12, 12, 51 At ~1750 RPM: .020 CLCE; IN .284; EX .280; Values: 72, 32 At 2000 RPM: .040 CLCE; IN .339; EX .336; Values: 50, 9, 9, 48.5 At 2500 RPM: .050 CLCE; IN .234; EX .231; Values: 47, 6, 7, 45.5 Other Data: B.H.P values: 163, 161.8, 158.5, 156, 153.5 I.H.P values: 155, 165 | ||