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 different radiator honeycomb designs and their performance metrics.
| Identifier | ExFiles\Box 149a\2\ scan0054 | |
| Date | 8th August 1932 guessed | |
| A comparison of this radiator with the 7 x 100 m/m round tube honeycomb, the 10 x 120 m/m round tube honeycomb and the 10 x 120 m/m round tube honeycomb with hexagonal ends shows the following results :- TABLE: Column Headers: [blank], GALLAY 7 x 100 m/m, 10 x 120 m/m, 10 x 120 m/m with hex: ends. Frontal area per 100 hp. sq: ft. | 2.44 | 3.05 | 3.18 | 3.18 Wt. empty per 100 hp. | 34.2 | 41.4 lbs. | 39.0 | 38.0 Wt. full per 100 hp. | 57.0 | 66.4 | 69.0 | 68.0 Resistance per 100 hp. | 15.6 | 17.8 | 13.0 | 9.7 m W plus R empty per 100 hp. | 21.9 | 25.4 | 20.2 | 16.7 m W plus R full per 100 hp. | 26.1 | 30.1 | 26.0 | 22.2 Equivalent wt empty. | 119.0 | 137.0 | 109.0 | 90.0 | ||