Performance data for the Peregrine engine, detailing M.E.P. with various tappet clearances and valve area comparisons.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page188 | |
| Date | 20th June 1932 guessed | |
| PEREGRINE(Experimental Bentley car never produced / Aero Engine) 5.85 C/R OPEN EXHAUST RM {William Robotham - Chief Engineer} PR3. M.E.P. AT 1500 RPM WITH VARIOUS TAPPET CLCE. TABLE 1: INLET CLCE | EXHAUST CLCE | M.E.P. .004 | .006 | 96 .013 | .006 | 98 .020 | .006 | 98.5 .004 | .013 | 97 .004 | .020 | 97 .013 | .013 | 98.5 .020 | .020 | 99.8 DIAGRAMS (LEFT TO RIGHT): Diagram 1: 22, 26, IN, 67.5, .005 CLCE, EX, 62 Diagram 2: 6, 9, EX, 47, .013 CLCE, IN, 50.5 Diagram 3: TDC35, EX, 41, .020 CLCE, IN, 46 TABLE 2: VARIATION IN TAPPET CLCE. | INLET | EXHAUST COLD | .004 | .006 80°C | .007 | .0085 10 MINS AT 4000RPM | .007 | .007 TABLE 3: AREA OF VALVE / LITRE | CHINA(Experimental Engine) | PEREGRINE(Experimental Bentley car never produced / Aero Engine) INLET | 2.23 | 2.69 EXHAUST | 1.90 | 2.3 PEREGRINE(Experimental Bentley car never produced / Aero Engine) RELATIVELY 21% LARGER | ||
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).