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 performance metrics for four different radiator block trials.
| Identifier | ExFiles\Box 149a\2\ scan0385 | |
| Date | 7th April 1921 guessed | |
| TRIAL NO. 608. 609. 610 611. NAME. HARRISON MARSTON GALLAY. MARSTON V1 V1 3 ROW. MARK V.{VIENNA} WEIGHT EMPTY LBS. 59.6 LBS. 60.6 61.6 56.6 HP. AT 100° T.D. 69 65 66 51.5 AT 3000 FT/MIN. & 20 G.P.M. AIR PRESSURE .365 .365 .4 .225 INCHES W.G. WATER PRESSURE 3.1 3.1 4.5 3.85 LBS/SQ. IN. AT 20 G.P.M. THICKNESS OF BLOCK. 52 m/m 52 m/m 50 m/m 58 m/m | ||