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 specifications including dimensions, hydraulic resistance, and weight.
| Identifier | ExFiles\Box 24\5\ Scan213 | |
| Date | 13th January 1930 guessed | |
| RADIATOR. Tube Dimensions Hydraulic Resistance on Rig Time Wt. Rad. Wt. Rad. Series & Piece No. & Piece No. for 60 galls. Empty. Full. V.{VIENNA} Series E73892/3. E.18491 100 secs. 126.5 169.75 8 - 7 mm. Water Capacity. 4.25 galls. F2B. Series E.79444 96 secs. 110 lbs. 160.5 lbs. E76044 Large Gap. 5½ - 7 mm. Water capacity 4.95 galls. F2B. Series 6 - 7 mm. 117 secs. OBSOLETE Small Gap. Phantom II 6 - 7 mm. 125 secs. 129¼ lbs. 171 lbs 10 oz Small Gap. Water capacity. 4 galls. Phantom II E.79448 105 secs. 119.5 168.5 Large gap. 6 - 7½ mm. Water capacity. 5 galls. E.77675. 20 HP. E.53375 165 secs.+ 92.4 lbs. 123.25 lbs. E.55062 7 - 8 mm. Water capacity. 3.1 galls. Chrysler Zig-Zag ribbon 122 secs.+ 61.6 lbs. 93 lbs. After 10,000 considerable. Water capacity. 2.15 galls. Indirect cooling. + These figures are comparable with one another but not with the 40/50 figures owing to the different size of inlet pipe to the radiator top tank. We are making further tests to bring 20 HP, and 40/50 to a common basis. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||