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).
Wind tunnel tests of Gallay radiators for a 200 HP Hispano Suiza Engine on a 'Dolphin' machine.
| Identifier | ExFiles\Box 27a\3\ Scan126 | |
| Date | 28th August 1930 guessed | |
| ROYAL AIRCRAFT FACTORY REPORT E 1072. SUBJECT. Test on Gallay Radiators as fitted to 200 h.p. Hispano Suiza Engine on "Dolphin" Machine. SUMMARY. Wind Tunnel tests have been made on two Gallay side Radiators similar to those fitted to a 200 h.p. Hispano Suiza engine in a Dolphin machine. The results show that these radiators are about 15% better than the 7 x 100 m/m honeycomb. Each of these radiators has a tube block 21.6 inches long X 5 inches wide x 4.6 inches deep. The frontal area of each is .75 square feet the weight empty 10.5 lbs and the weight full 17.5 lbs. The head resistance per square foot frontal at 60 m.p.h. is 6.4 lbs. The following table shows the mean results of the tests: Water Air Lbs per minute. oF T.F. Tl.F Vamph. Ta.F. n.Th.U per min. Ditt. 60 mph and with 150°diff. of temperature. 9.6 206.5 192.80 37.0 52.5 875 1290 8.9 206.62 196.45 37.0 53.5 901 1320 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 12 x 120 m/m round tube honeycomb with hexagonal ends shows the following results:- | ||