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).
Comparison table of performance metrics for various engine cylinder configurations.
Identifier | ExFiles\Box 31\2\ Scan092 | |
Date | 14th July 1933 guessed | |
Side Header: B.H.P. CORRECTED TO 63¾" AND 15" DEPp Main Column Headers: 40/50, CHINA, J.I., PEREGRINE, J2, J3, KESTREL IB Sub-Column Headers: (40/50: SHORT DURATION, LONG DURATION), (J.I.: CHINA C'SHAFT), (PEREGRINE: LARGE VALVE, SMALL VALVE) Row Data: SWEPT VOL. PER CYL.: 1280, 1280, 612, 612, 612, 394, 394, 680, 744, 1770 VALVE LIFT: .480, .480, .400, .400, .400, .335, .335, .400, .400, .463 VALVE AREA PER LITRE: 2.11, 2.11, 2.23, 2.37, 2.37, 2.69, 2.37, 2.30, 2.10, 2.35 AREA VALVE LIFT CURVE ☐": 64.50, 69.38, 56.27, 56.27, 61.55, 49.94, 49.94, 59.70, 59.70, 76.71 INTEGRATED AREA. PAST VALVE ☐" MINS/LITRE: 1.05 AT 2850, 1.05 AT 3050, 1.05 AT 3750, 1.05 AT 3850, 1.05 AT 4200, 1.05 AT 4500, 1.05 AT 4200, 1.05 AT 3750, 1.05 AT 3450, 1.05 AT 4200 MEASURED MAX. B.H.P: 140 AT 2800 4.7 C/R, 180 AT 3250 5.25 C/R 250lbs, 109 AT 3750 6.8 C/R, , 114 AT 4000 1.5 Depn, 77 AT 4250, 72.5 AT 4000, 102 AT 3750 5.5 C/R, 111 AT 3400, 630 AT 5000 7C/R 18"DN COR. B.H.P./ON LITRES ⅔: , 288, 252, , 264, 236, 222, 232, 238, 347 COR. B.H.P. VALVE AREA: , 73.0, 75.0, , 78.8, 72.0, 77.5, 68.5, 74.1, 73.5 VALVE AREA LITRES ⅓: 230, , , , 202, 198, 173, 201, 190, 285 OPTIMUM SPEED LITRES ⅓: .352, , .320, , .348, .312, , .330, .310, .363 STROKE BORE: 1.29, 1.29, 1.37, 1.37, 1.37, 1.51, 1.51, 1.54, 1.47, 1.1 VALVE AREA PISTON AREA: .19, .19, .164, .164, .175, .182, .151, .188, .172, .212 B.H.P. LITRE: 25.6, , , , 31.2, 32.3, , 26.4, 25.9, 28.9 | ||