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).
Comparative data table of various cars, focusing on cooling system specifications and performance metrics.
| Identifier | ExFiles\Box 24\5\ Scan316 | |
| Date | 1st September 1930 guessed | |
| TABLE COLUMNS: TYPE OF CAR, DISPLACEMENT, TYPE OF BODY, WT OF COMPLETE CAR AS TESTED. DIMENSION OF MATRIX, WATER CAPACITY OF SYSTEM. TYPE OF TOP MATRIX TANK DIMENSIONS. FAN AND DRIVE. DIRECT DRIVE RATIO AND EFFECTIVE TYRE CIRCUMFERENCE. BONNET VENTILATION AND DISPOSITION OF UNDERSHIELDS. MIXTURE DISPLACEMENT PER TON PER MILE. MIXTURE DISPLACEMENT PER MILE. FACE AREA PER 1000 LITRES DISP □" VOLUME PER 1000 LITRES DISP INS³ TOP WATER TEMP ATTAINED CONST. SPEED 60MPH LAP SPEED M.P.H ROW 1: MARMON 8-79 TYPE: SEDAN 5 SEATER, 3 3/16 x 4 3/4, RAC. RATING 32.5, DISP 4960 C.C., WT. OF CAR 4200 LBS, 1.87 TONS, COMP RATIO 5.5-1 MATRIX: DEPTH OF MATRIX 2.75, AREA 480 □", VOLUME 1320 INS³, WATER CAPACITY 7 GALLS. TOP TANK: ZIG ZAG RIBBON WITH INDIRECT FINS. FAN: 4 BLADED, CRANKSHAFT SPEED, CANVASS RUBBER BELT. DRIVE/TYRE: 4.45-1, TYRE ROLLING CIRC. 30 LBS/□", 91.50 VENTILATION: BONNET VENTILATED WITH 9 HORIZONTAL LOUVRES PER SIDE 41.5" LONG. MIXTURE/TON/MILE: 4070 MIXTURE/MILE: 7625 FACE AREA/1000L: 63.0 VOLUME/1000L: 173 TEMP: 85°C AT 53 MPH, ENGINE PERFORMANCE UNSATISFACTORY SPEED: 67 M.P.H ESTIMATED ROW 2: HISPANO 1927 TYPE: 2 SEATER COUPE, DISP 6597 C.C., WT. OF CAR 5160 LBS, 2.30 TONS, COMP RATIO 5-1 MATRIX: DEPTH 4.00", AREA 530 □", VOL 2120 INS³. TOP TANK: ZIG ZAG RIBBON WITH INDIRECT. FAN: 4 BLADED FAN, 9" LONG. DRIVE/TYRE: 3.365-1, 106 AT 50LBS/□", HIGH PRESS TYRES FITTED. VENTILATION: NO UNDERSHIELD VENTILATION, BONNET VENTILATION, 20 LOUVRES PER SIDE 14.5" LONG. MIXTURE/TON/MILE: 3,000 MIXTURE/MILE: 6860 FACE AREA/1000L: 77.2 VOLUME/1000L: 309 TEMP: 74°C SPEED: 85 M.P.H, C.O. OPEN ROW 3: GRAHAM PAIGE TYPE: 3.5 x 5", 5 SEATER SEDAN, COMP RATIO 5.35-1, WHEELBASE 121", DISP 4730 C.C., WT OF CAR 4124 LBS, 1.84 TONS MATRIX: DEPTH 3.375, 390 □ INS, 1318 INS³. TOP TANK: VOL 114 CU INS, FIN & TUBE MATRIX TUBE, PITCH .5" FAN: 4 BLADED FAN BLADES 8.5" LONG, 1.75" FROM RAD, DRIVEN BY FLAT CANVASS RUBBER BELT 1.5" WIDE OFF WATER PUMP SHAFT. DRIVE/TYRE: 3.643-1, TYRE CURCUM AT 30 LBS/□", 91.0 VENTILATION: UNDERSHIELD WELL VENTILATED WITH LOUVRES & FINISHES 4" FORWARD OF THE DASH LEAVING A GAP 7" x 14" FOR AIR TO GET AWAY. BONNET 26 LOUVRES 15" LONG SPACED OVER 19.75. ENGINE 10.0" FROM RADIATOR. MIXTURE/TON/MILE: 3260 MIXTURE/MILE: 6,000 FACE AREA/1000L: 65.0 VOLUME/1000L: 220 TEMP: 77°C SPEED: 71.66 M.P.H ROW 4: PIERCE ARROW TYPE: 6 SEATER LIMOUSINE, 3.5" x 5" 8 CYL, WHEELBASE 144", DISP 6300 CC., WT. OF CAR 5200 LBS, 2.32 TONS, COMP RATIO 5.07-1 MATRIX: DEPTH 2.375, AREA 525 □", VOL 1246 INS³. TOP TANK: 4.75" DEEP, ZIG ZAG RIBBON WITH INDIRECT, VOL 310 CU: INS. FAN: 6 BLADED FAN BLADES 10" LONG, 1" FROM RAD, FAN DRIVEN AT ENGINE SPEED BY CANVASS RUBBER BELT WHICH ALSO DRIVES WATER PUMP & DYNAMO. DRIVE/TYRE: 4.5-1, GOODRICH 7"x18", CIRCUM @ 30 LBS/□", WATER CAPACITY 3.25 GALLS. VENTILATION: BONNET 4 SHUTTERS/SIDE, 7"x4" APPROX, 2' DIA HOLES. MIXTURE/TON/MILE: 4150 MIXTURE/MILE: 9630 FACE AREA/1000L: 54.4 VOLUME/1000L: 129 TEMP: 82°C SPEED: 69.5 M.P.H ROW 5: CHRYSLER 75 TYPE: 5 SEATER SEDAN, 3657 LBS, 1.63 TONS, 4075 C C DISP, COMP RATIO 5-1 MATRIX: DEPTH 2.5, FRONT AREA 458 □", VOLUME 1146 INS³. TOP TANK: TANK EXTENSION BEHIND BONNET, TOTAL TOP TANK VOLUME 273 CU INS APPROX, WATER IN RAD 2.2 GAL, TOTAL WATER CAP OF SYSTEM 3.5 GAL. FAN: FAN BLADES 8" LONG, LEADING EDGE .5" FROM RADIATOR, FAN 1.3 TIMES ENGINE SPEED. DRIVE/TYRE: 3.9-1, EFFECTIVE CIRCUM 91.0" @ 30 LBS/□". VENTILATION: UNDERSHIELD COMPLETE TO WITHIN 3.0" OF THE DASHBOARD NO GEARBOX. UNDERSHIELD CLEAR GAP OF 80 □" EACH SIDE FOR AIR TO GET AWAY UNDER THE DASH BENEATH FLOORBOARDS. NO GEARBOX UNDERSHIELD. LOUVRES 13 1/2" LONG 20 PER SIDE. MIXTURE/TON/MILE: 3,410 C C, LATEST 77 CHRY 3590 MIXTURE/MILE: 5540 FACE AREA/1000L: 82.7 VOLUME/1000L: 207 TEMP: 73°C SPEED: 66.9 M.P.H ROW 6: ROLLS ROYCE 40/50 TYPE: 7 SEATER CABRIOLET, 7668 C.C. DISP, WT. 5400 LBS, 2.41 TONS, RATING 44 H.P., COMP RATIO 4.6-1 MATRIX: DEPTH 4.0", FRONTAL AREA 830 □", VOLUME 2520 INS³. TOP TANK: TOP TANK VOLUME N. SCH 2951 376 CU. INS, WATER CAP RAD 4.55 GAL, TOTAL WATER CAP OF THE SYSTEM 7.30, CAP OF ENGINE 2.75G. FAN: FAN BLADES 11" LONG, LEADING EDGE 1.5" FROM RAD, FAN DRIVEN AT ENGINE SPEED. DRIVE/TYRE: 3.727-1, EFFECTIVE CIRCUM 102.5 VENTILATION: TWO (AND SHORTLY 4) BONNET SHUTTERS AS STANDARD 2 PER SIDE 10"x4". NO VENTILATION BETWEEN RAD & ENGINE WHEELCASE. LOUVRES IN ENGINE SIDE GUARDS 8/SIDE 5" WIDE BUT NOT IN A VERY EFFECTIVE POSITION BEING SCREENED BY THE FRONT ENGINE FOOT. AIR EXIT UNDER DASH OBSTRUCTED ON N.S BY MAG & ENGINE FOOT. O.S BY CARB. OIL FILLER HORN & PETROL FILTER. MIXTURE/TON/MILE: 3670 MIXTURE/MILE: 8850 FACE AREA/1000L: 71.2 VOLUME/1000L: 285 TEMP: NOT YET ACCURATELY RECORDED SPEED: 82.5 M.P.H, C.O. OPEN ROW 7: ROLLS ROYCE 25 H.P TYPE: 6 SEATER CAB., 3669 C.C. DISP, WT. 3880 LBS, 1.73 TONS, RATING 20 H.P., COMP RATIO 5.25-1 MATRIX: DEPTH 3.700, FRONTAL AREA 570, VOLUME 1695 INS. REFERENCE E.55062. TOP TANK: WATER CAP RAD 3.375G, TOTAL WATER CAP SYSTEM 4.685 GAL, TOTAL VOL APPROX TOP TANK 233 CU: INS. FAN: FAN BLADES 9.00 LONG, FAN DRIVEN 1.23 TIMES ENGINE SPEED. DRIVE/TYRE: 4.545-1, EFFECTIVE CIRCUM 96.0". VENTILATION: NO BONNET VENTILATION FITTED AS STANDARD. NO VENTILATION BETWEEN RAD & ENGINE WHEELCASE. 6 LOUVRES/SIDE IN ENGINE GUARDS. FACILITIES FOR GETTING AIR AWAY UNDER DASH BETTER THAN 40/50 BUT WORSE THAN MOST AMERICAN CARS. MIXTURE/TON/MILE: 3,175 MIXTURE/MILE: 5500 FACE AREA/1000L: 83.0 VOLUME/1000L: 308 TEMP: 71°C SPEED: 64 M.P.H | ||