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 radiator performance and specifications for the 19 E.X. Car.
| Identifier | ExFiles\Box 131\1\ scan0009 | |
| Date | 21th April 1931 | |
| CRITICAL ATS. TEMP OR TEMPERATURE AT WHICH THE CAR WILL BOIL IF DRIVEN FOR SUFFICIENTLY LONG AT FULL THROTTLE UNDER THE CONDITIONS STATED. TESTS ON 19 E.X. CAR. CONDITIONS AS IN HS{Lord Ernest Hives - Chair}/RM{William Robotham - Chief Engineer}/1/KT. 21-4-31. DETAILS OF RADIATORS RAD. DIMENSIONS 25.9" x 23.7" x 4.0" E.77675 TABLE DATA: Column Headers: Type of RADIATOR MATRIX | 60 M.P.H. NO BONNET VENTILATION TEMP. CENT. DEGREES | ALL OUT NO BONNET VENTILATION | ALL OUT VERTICAL LOUVRED BONNET | RADIATOR LBS WT. EMPTY | RADIATOR LBS WT. FULL | NO APPROX. OF TUBES Row 1: Type: SMALL HEXAGON U.S.A, HEX. .312 ACROSS FLATS, CENTRE .265 DIA. ROUND, NO. OF DENTS 18 Values: 45.5 | 38 | 45.5 | 107.75 | 145 | 7390 Row 2: Type: PARALLEL SQUARE TUBE 6 M.M., E.{Mr Elliott - Chief Engineer} 81385 Values: 42 | 33.0 | 39.75 | 140 | 162 | 8860 Row 3: Type: LARGE HEXAGON U.S.A., HEX. .360 ACROSS FLATS, CENTRE .309 DIA. ROUND, NO. OF DENTS 20 Values: 41.5 | 32.5 | 42 | 95 LBS | 130 | 5540 Row 4: Type: 1931 STANDARD TUBE, 6/7 1/2 M.M. ROUND, E.79448 4 DENTS/TUBE Values: 39.5 | 30.5 | 39 | 120 | 168 | 8160 Row 5: Type: SQUARE TUBE E.81389, 6/7 1/2 M.M. VERTICAL WATERWAYS ONLY. Values: 38 | 29.5 | 39.0 | 129.5 | 159 | 8,860 Row 6: Type: 4/7 EXPANDED END [] TUBE, E.{Mr Elliott - Chief Engineer} 80239 Values: 38.5 | 30 | 38 | 132 | 160 | 7050 Row 7: Type: 1930 STANDARD TUBE, 6/7 1/2 M.M. ROUND, E.{Mr Elliott - Chief Engineer} 79448 Values: 34.25 | 21.75 | 32.25 | 120 | 168 | 8160 NOTES: WT. OF SHUTTERS COMPLETE WITH FITTINGS ON RAD 14LBS. 4oz ALL RADIATORS WEIGHED COMPLETE WITH SHUTTERS. NO THERMOSTATS. WT. OF RADIATOR FULL IS WT. WITH WATER @ 15°C. HALF WAY UP OVER-FLOW PIPE EXPANSION SPACE ON THESE RADIATORS 2.8 PINTS. | ||