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 analysis of a Gallay 3 Row Radiator and a Serck 4 row Staggered Matrix.
| Identifier | ExFiles\Box 150\2\ scan0065 | |
| Date | 29th June 1938 | |
| FW 1280 29.6.38. Comparison between Gallay 3 Row Radiator and Serck 4 row Staggered Matrix. Name of Radiator | Gallay 3 Row Block | Serck 4 Row Staggered Matrix No.0820 --- Trial Number | 611 | 685 Frontal Area | 3.2 sq.ft. | 2.725 sq.ft. Block Thickness | 50 m {Mr Moon / Mr Moore} /m 1.97" | 56.4 m {Mr Moon / Mr Moore} /m 2.22" Weight Empty | 56.6 lbs. | 34 lbs. (no side plates). Total Air Flow Cub. feet/min. | 3000 | 3,000 | 2,550 Water Flow 20 galls/min. | H.P. at 100°F T.D. | 66.2 | 56.5 | 49.6 | Air Press Drop Ins.Water (Hot) | .4 | .296 | .22 | Air Velocity Ft/Min. | 937 | 1,000 | 937 Water Pressure Drop lbs/sq.in. Across Radiator including Top Tanks Etc. at 20 galls/min. | 4.5 lbs/sq.in. | 2.9 lbs/sq.in. /Sq.ft. F.A. | Cooling Surface Square Ft. | Approx. 42 sq.ft. | 41.4 sq.ft. | Ft. Run of Tubing. | 87.8 ft. | 75.8 ft. Gills per ft. of height. | 127.5 | 108 Tubes per ft. Width per row. | 30.3 | 19.2 | ||