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).
Bar chart comparing the atmospheric temperature at which a car will boil under various cooling configurations and conditions.
| Identifier | ExFiles\Box 38\2\ Scan270 | |
| Date | 23th March 1921 | |
| COMPARISON OF VARIOUS CAR CONDITIONS ATMOSPHERIC TEMP. AT WHICH THE CAR WILL INEVITABLY BOIL IF DRIVEN FOR SUFFICIENTLY LONG ON FULL THROTTLE AT THE SPEED AND UNDER THE CONDITIONS MENTIONED. SECTION 1: ALTERATION IN MATRIX HEIGHT. COMPARISON OF ADVANTAGES TO BE GAINED BY INCREASING HEIGHT OF MATRIX 40/50 CAR. NO VENTILATION. 30 M.P.H. Bars: Matrix Height 20¼", Matrix Height 21¼", Matrix Height 22¾", Matrix Height 23¼" SECTION 2: E.A.C. V STANDARD TUBES REDUCTION IN EFFICIENCY DUE TO REDUCING TUBE LENGTH BY 8½% 30 M.P.H. NO VENTILATION. Bars: 4.8" TUBES, 4.4" TUBES SECTION 3: VALUE OF DEGREES OF VENTILATION 30 M.P.H. 20¼" MATRIX. Bars: NO VENTILATION, STANDARD SHUTTERS 4" x 10.5", LOUVRES, SIDE PANELS OFF, TOP PANELS OFF SECTION 4: COMPARISON OF VALUE OF LOUVRES AND SHUTTERS AND MAXIMUM VENTILATION POSSIBLE BY REMOVING BONNET SIDES OR TOP. BEST SHUTTER POSITIONS. COMPARISONS OF SHUTTER POSITIONS IN FRONT OR REAR OF SIDE PANEL 40 M.P.H. 20¼" MATRIX. LARGE SHUTTERS 8" x 14.5" Bars: NO VENTILATION, REAR SHUTTERS OPEN, FRONT SHUTTERS OPEN, ALL SHUTTERS OPEN SECTION 5: INCREASE OF ROAD SPEED EFFICIENCY OF COOLING SYSTEM AT VARIOUS ROAD SPEEDS 20¼" MATRIX. 4 . 8" TUBES. NO VENTILATION. Bars: 20 M.P.H., 30 M.P.H., 40 M.P.H. SECTION 6: FAN VALUE. RELATIVE DEPENDANCE OF HISPANO Z - 40/50 ON THEIR FANS. LOUVRED BONNETS 40/50. 20¼" MATRIX. ROAD SPEED 30 M.P.H. Bars: 40/50 WITHOUT FAN, 40/50 WITH FAN, HISPANO WITHOUT FAN, HISPANO WITH FAN SECTION 7: LIMITING IMPROVEMENT TO 40/50. COMPARISON OF BEST 40/50 CONDITIONS WE CAN GIVE CUSTOMERS AND HISPANO 40/50 22¾" MATRIX LARGE SHUTTERS OPEN. HISPANO STANDARD LOUVRED BONNET. 30 M.P.H. Bars: STANDARD HISPANO, 40/50 - 22¾" MATRIX, LARGE SHUTTERS SECTION 8: HISPANO V 40/50 (PRESENT STANDARD) BOTH CARS LOUVRED BONNETS. R.R. 21¼" MATRIX. Bars: HISPANO 20 M.P.H, HISPANO 30 M.P.H SECTION 9: COMPARISON OF STANDARD PRESENT 40/50 MATRIX, AND HISPANO SIMILAR CONDITIONS Bars: 40/50 20 M.P.H, 40/50 30 M.P.H AXIS LABEL: ATMOSPHERIC TEMPERATURE C° STAMP: M.O. PATENTS DEPT. 7 OCT 1921 | ||