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 tests and specifications for various matrix types.
| Identifier | ExFiles\Box 29\3\ Scan317 | |
| 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}/KT 21-4-31. TYPE OF RADIATOR MATRIX 60 M.P.H NO BONNET VENTILATION TEMP CENT FULL OUT NO BONNET VENTILATION DEGREES FULL OUT VERTICAL LOUVRED BONNET DETAILS OF RADIATORS RADIATOR LBS WT. EMPTY RADIATOR LBS WT. FULL RAD DIMENSIONS 25.9" x 23.7" x 4.0" E 77675 NO APPROX. OF TUBES 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 | 7330 PARALLEL SQUARE TUBE 6 M.M. E.{Mr Elliott - Chief Engineer} 81385 | 42 | 33.0 | 39.75 | 140 | 162 | 8860 LARGE HEXAGON U.S.A. HEX .360 ACROSS FLATS CENTRE .303 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 | 39.5 | 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 6/7 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. 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. | ||