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 different radiator matrix types and their boiling temperatures under various conditions.
| Identifier | ExFiles\Box 16\2\ Scan016 | |
| Date | 21th April 1931 | |
| TYPE OF RADIATOR MATRIX 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 EX. CAR CONDITIONS AS IN HS{Lord Ernest Hives - Chair}/RM{William Robotham - Chief Engineer} 1/KT 21-4-31 RAD. DIMENSIONS 25.9 x 23.7 x 4.0 E 77675 DETAILS OF RADIATORS 60 M.P.H. NO BONNET VENTILATION ALL OUT NO BONNET VENTILATION ALL OUT VERTICAL LOUVRED BONNET RADIATOR WT EMPTY RADIATOR LBS WT FULL NO APPROX OF TUBES TEMP CENT DEGREES SMALL HEXAGON U.S.A HEX .312 ACROSS FLATS CENTRE .265 DIA. ROUND No. OF DENTS 18 45.5 38 45.5 107.75 145 7390 PARALLEL SQUARE TUBE G.M.M. E.{Mr Elliott - Chief Engineer} 31385 42 33.0 39.75 140 162 8860 LARGE HEXAGON U.S.A HEX .360 ACROSS FLATS CENTRE .302 DIA. ROUND No. OF DENTS 20 41.5 32.5 42 95 LBS 130 5540 1931 STANDARD TUBE 6/7 1/2 M.M. ROUND E.{Mr Elliott - Chief Engineer} 79448 4 DENTS/TUBE 30.5 30.5 39 120 168 8160 SQUARE TUBE E.{Mr Elliott - Chief Engineer} 81389 6/7 1/2 M.M. VERTICAL WATERWAYS ONLY 38 29.5 39.0 129.5 159 8,860 9/7 EXPANDED END TUBE E.{Mr Elliott - Chief Engineer} 80239 38.5 30 38 132 160 7050 1930 STANDARD TUBE 6/7 1/2 M.M. ROUND E.{Mr Elliott - Chief Engineer} 79448 34.25 21.75 32.25 120 168 8160 WT. OF SHUTTERS COMPLETE WITH FITTINGS ON RAD 14 LBS 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. | ||