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 types of radiator tubes tested on a 19EX car at Brooklands track.
| Identifier | WestWitteringFiles\U\August1930-November1930\ Scan119 | |
| Date | 14th October 1930 guessed | |
| FIGURES GIVEN ARE CRITICAL ATS TEMP AT WHICH THE CAR WILL EVENTUALLY BOIL IF DRIVEN SUFFICIENTLY LONG DETAILS OF RADIATORS TABLE DATA: COLUMN HEADERS: - TYPE OF RADIATOR TUBES - 60 M.P.H NO BONNET VENTILATION (TEMPS CENTIGRADE) - ALL OUT NO BONNET VENTILATION (DEGREES) - ALL OUT VERTICAL LOUVRED BONNET - RADIATOR WT LBS EMPTY - RADIATOR WT LBS FULL - NO OF TUBES - SQ.FT SURFACE OF RADIATOR - % DIRECT COOLING ROW 1: - Type: LATEST E 81385 6m.m. SQUARE PARALLEL TUBES - Temps Centigrade: 42 - Degrees (No Bonnet): 33 - Degrees (Louvred Bonnet): 39.75 - Wt Empty (LBS): 140 - Wt Full (LBS): 176* - No of Tubes: 8860 - Surface (SQ.FT): 218.5 - % Direct Cooling: 46.2 ROW 2: - Type: STANDARD. 6/7 1/2 TURBULENT AIRFLOW TUBES - Temps Centigrade: 39.5 - Degrees (No Bonnet): 30.5 - Degrees (Louvred Bonnet): 39 - Wt Empty (LBS): 120.5 - Wt Full (LBS): 168 - No of Tubes: 8115 - Surface (SQ.FT): 164 - % Direct Cooling: 84.4 ROW 3: - Type: 6/7. EXPANDED END SQUARE TUBE. E80239 - Temps Centigrade: 37.75 - Degrees (No Bonnet): 28.0 - Degrees (Louvred Bonnet): 36.75 - Wt Empty (LBS): 132 - Wt Full (LBS): 173* - No of Tubes: 7050 - Surface (SQ.FT): 178 - % Direct Cooling: 84.5 ROW 4: - Type: 5 1/2 / 7 ROUND TUBES E79321 - Temps Centigrade: 36.75 - Degrees (No Bonnet): 24.75 - Degrees (Louvred Bonnet): 34.75 - Wt Empty (LBS): 137.75 - Wt Full (LBS): 181 - No of Tubes: 8991 - Surface (SQ.FT): 163.5 - % Direct Cooling: 84.3 ROW 5: - Type: GALLAY. ZIG ZAG RIBBON NO INDIRECT - Temps Centigrade: 34.5 - Degrees (No Bonnet): 25.0 - Degrees (Louvred Bonnet): Not Taken. - Wt Empty (LBS): 114 - Wt Full (LBS): 154 - No of Tubes: Not Calculated - Surface (SQ.FT): Not Calculated - % Direct Cooling: 84 ROW 6: - Type: STANDARD 6/7 1/2 TUBES E79448 - Temps Centigrade: 34.25 - Degrees (No Bonnet): 21.75 - Degrees (Louvred Bonnet): 32.25 - Wt Empty (LBS): 120.5 - Wt Full (LBS): 168.5 - No of Tubes: 8115 - Surface (SQ.FT): 164 - % Direct Cooling: 84.4 NOTES: * SOLID VERTICAL STRIPS. ROLLED VERTICAL STRIPS REDUCE RADIATOR WT BY .15-16 LBS TESTS CONDUCTED ON 19E.X. CAR ON BROOKLANDS TRACK All RADIATOR MATRIX DIMENSIONS 25.9" x 23.7". CAR WT. 48 CWT AXLE RATIO 11x41. | ||