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).
Synopsis of a report comparing the performance of a Gallay radiator section against a round tube type for automobile and aero use.
| Identifier | ExFiles\Box 27a\3\ Scan125 | |
| Date | 28th August 1930 guessed | |
| SYNOPSIS OF ATTACHED REPORT. 1. It will be noted that the Gallay radiator section submitted is 15% better than the 7 m/m x 100 m/m round tube (which up to that period had been found the most satisfactory for automobile and aero use. This is the essential point of the report. 2. The frontal area, weight empty, weight full, resistance and other features show to the advantage of the Gallay system and confirm our claims that our radiators are more efficient than and lighter than any others. 3. It will be noted that the weight is 10.5 lbs. per unit being a total of 21 lbs. for a complete radiator to cool a 200 h.p. engine. 4. The B. Th. Us. per square foot dissipated frontal area are 1560. 5. The tests were made on the latest Royal Aircraft Factory testing plant with special wind tunnel etc., and may be accepted as most comprehensive and exhaustive and confirming in detail their previous tests on our sample sections. It will be noted that actual radiators were tested ( as manufactured in quantities of several thousands) The report therefore has an enhanced value in comparison with tests usually made on purely experimental types which may not be satisfactory in actual use. The engine cooled was the 200 h.p. Hispano Suiza fitted to the Sopwith Dolphin Aeroplane. On the contemporary type of aeroplane namely the S.E.5 the standard type of radiator weighed 50 lbs. and was not as efficient as the Gallay type weighing 21 lbs. | ||