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).
Summary of power increases and specifications for the Hawk, Eagle, Falcon, and Condor aero engines.
| Identifier | ExFiles\Box 36\2\ scan 082 | |
| Date | 3rd December 1918 | |
| X.2935 3.12.18. X.2245. INCREASE IN POWER OF AERO ENGINES. X.2501. * This is a typo - see ETC/AT 3.12.18 Fig. is 94 HAWK. X.2935. HP. First engine made Dec. 1915. Power at normal speed 1350 r.p.m. 83 Dates of increase in power 1350 r.p.m. Feb. 1916. 91 " " " Apl. 1916. 91.5 " " " Oct. 1918. *(105) 94 normal speed 1500 " " 105 Maximum permissible speed 1700 Quantity of water in Engine 1.4 galls. Belongs here, see memo quoted above DST 24OCT2006 EAGLE. First engine run March 1915. Oct. 1915. 255 Power of Eagles. Mar. 1916. 266 Dates of various increases in power. July.1916. 284 Dec. 1916. 322 Sept.1917. 350 Feb. 1918. 360 [Oil consumption .02] Quantity of water in Eagle 3.1 galls. FALCON. X.2965. First engine run April 1916. Power at normal speed 1800 r.p.m. Apl. 1916. 205 Dates of various increases in power " " May. 1916. 209 " " " " 215 " " " " 228 " " Feb. 1917 247.5 " " " " 270 " " Apl. " 262 " " Nov. " 262 " " " " 278 2000 " July.1918. 259 1800 " " " 285.5 2000 " " " Quantity of water in Falcon 2.5 galls. CONDOR. X.1831. First run August. 1918. Power at normal speed 1750 r.p.m. 610 With 25% Benzol added. 620 R R 236A (100) ('S. H.{Arthur M. Hanbury - Head Complaints} 159. 11-8-88) G 3804 | ||