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 for various car models.
| Identifier | ExFiles\Box 27a\3\ Scan111 | |
| Date | 21th 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, 5 3/4 - 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. | 129 1/4 lbs. Water capacity. | 171 lbs 10 oz, 4 galls. Phantom II Large gap. E.77675. | E.79448, 6 - 7 1/2 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} | ||