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).
Graph comparing the water flow characteristics of Harrison and Gallay radiator blocks.
| Identifier | ExFiles\Box 149a\2\ scan0300 | |
| Date | 23th December 1935 | |
| GALLAY Ltd 103/109 Scrubs Lane. London N.W.10. WATER FLOW (Through the block only) Rolls-Royce-Bentley Radiator. Frontal Area of the matrix = 500 m/m x 600 m/m Head of Water in Feet. Water Flow in Gallons per min. Harrison Block 58 m/m Gallay Block 50 m/m 23. 12. 35 | ||