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).
Performance comparison of different radiator matrix types under various test conditions.
| Identifier | ExFiles\Box 105\1\ scan0141 | |
| 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 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 TABLE DATA: Row 1: TYPE OF RADIATOR MATRIX: SMALL HEXAGON U.S.A. HEX. .312 ACROSS FLATS CENTRE .265 DIA. ROUND No. OF DENTS 18. 60 M.P.H. NO BONNET VENTILATION. TEMP CENT DEGREES: 45.5 ALL OUT NO BONNET VENTILATION: 38 ALL OUT VERTICAL LOUVRED BONNET: 45.5 DETAILS OF RADIATORS - RADIATOR WT EMPTY LBS: 107.75 RADIATOR WT FULL LBS: 145 No. APPROX. OF TUBES: 7390 Row 2: TYPE OF RADIATOR MATRIX: PARALLEL SQUARE TUBE 6 M.M. E.{Mr Elliott - Chief Engineer} 81385 60 M.P.H. NO BONNET VENTILATION. TEMP CENT DEGREES: 42 ALL OUT NO BONNET VENTILATION: 33.0 ALL OUT VERTICAL LOUVRED BONNET: 39.75 DETAILS OF RADIATORS - RADIATOR WT EMPTY LBS: 140 RADIATOR WT FULL LBS: 162 No. APPROX. OF TUBES: 8860 Row 3: TYPE OF RADIATOR MATRIX: LARGE HEXAGON U.S.A. HEX. .360 ACROSS FLATS. CENTRE .309 DIA. ROUND. No. OF DENTS 20. 60 M.P.H. NO BONNET VENTILATION. TEMP CENT DEGREES: 41.5 ALL OUT NO BONNET VENTILATION: 32.5 ALL OUT VERTICAL LOUVRED BONNET: 42 DETAILS OF RADIATORS - RADIATOR WT EMPTY LBS: 95 LBS RADIATOR WT FULL LBS: 130 No. APPROX. OF TUBES: 5540 Row 4: TYPE OF RADIATOR MATRIX: 1931 STANDARD TUBE 6/7 1/2 M.M. ROUND E.79448 4 DENTS / TUBE 60 M.P.H. NO BONNET VENTILATION. TEMP CENT DEGREES: 39.5 ALL OUT NO BONNET VENTILATION: 30.5 ALL OUT VERTICAL LOUVRED BONNET: 39 DETAILS OF RADIATORS - RADIATOR WT EMPTY LBS: 120 RADIATOR WT FULL LBS: 168 No. APPROX. OF TUBES: 8160 Row 5: TYPE OF RADIATOR MATRIX: SQUARE TUBE E.81389 6/7 1/2 M.M. VERTICAL WATERWAYS ONLY. 60 M.P.H. NO BONNET VENTILATION. TEMP CENT DEGREES: 38 ALL OUT NO BONNET VENTILATION: 29.5 ALL OUT VERTICAL LOUVRED BONNET: 39.0 DETAILS OF RADIATORS - RADIATOR WT EMPTY LBS: 129.5 RADIATOR WT FULL LBS: 159 No. APPROX. OF TUBES: 8,860 Row 6: TYPE OF RADIATOR MATRIX: 6/7 EXPANDED END □ TUBE. E.{Mr Elliott - Chief Engineer} 80239. 60 M.P.H. NO BONNET VENTILATION. TEMP CENT DEGREES: 38.5 ALL OUT NO BONNET VENTILATION: 30 ALL OUT VERTICAL LOUVRED BONNET: 38 DETAILS OF RADIATORS - RADIATOR WT EMPTY LBS: 132 RADIATOR WT FULL LBS: 160 No. APPROX. OF TUBES: 7050 Row 7: TYPE OF RADIATOR MATRIX: 1930 STANDARD TUBE 6/7 1/2 M.M. ROUND E.79448. 60 M.P.H. NO BONNET VENTILATION. TEMP CENT DEGREES: 34.25 ALL OUT NO BONNET VENTILATION: 21.75 ALL OUT VERTICAL LOUVRED BONNET: 32.25 DETAILS OF RADIATORS - RADIATOR WT EMPTY LBS: 120 RADIATOR WT FULL LBS: 168 No. APPROX. OF TUBES: 8160 SIDE NOTES: WT. OF SHUTTERS COMPLETE WITH FITTINGS ON RAD 14 LBS 4 OZ 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. | ||