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).
Comparative table of radiator specifications.
| Identifier | ExFiles\Box 15\1\ Scan199 | |
| Date | 13th January 1930 guessed | |
| RADIATOR. Series & Piece No. Tube Dimensions & Piece No. Hydraulic Resistance on Rig Time for 60 galls. Wt. Rad. Empty. Wt. Rad. Full. V.{VIENNA} Series E73892/3. E.18491 8 - 7 mm. 100 secs. 126.5 Water Capacity. 169.75 4.25 galls. F2B. Series E76044 Large Gap. E.79444 5¼ - 7 mm. 96 secs. 110 lbs. Water capacity 160.5 lbs. 4.95 galls. F2B. Series Small Gap. 6 - 7 mm. 117 secs. OBSOLETE Phantom II Small Gap. 6 - 7 mm. 125 secs. 129¼ lbs. Water capacity. 171 lbs 10 ozs. 4 galls. Phantom II Large gap. E.77675. E.79448 6 - 7½ mm. 105 secs. 119.5 Water capacity. 168.5 5 galls. 20 HP. E.55062 E.53375 7 - 8 mm. 165 secs. + 92.4 lbs. Water capacity. 123.25 lbs. 3.1 galls. Chrysler After 10,000 Zig-Zag ribbon considerable. Indirect cooling. 122 secs.† 61.6 lbs. Water capacity. 93 lbs. 2.15 galls. + 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} | ||