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).
Performance graph for the Singapore I aircraft with four Falcon II engines at an altitude of 8000 ft.
| Identifier | ExFiles\Box 36\2\ scan 157 | |
| Date | 29th February 1928 guessed | |
| 4 FALCON II ENGINES WOOD AIRSCREWS GEAR RATIO .477/1 ESTIMATED PERFORMANCE OF SINGAPORE I AT 8000 FT. DESIGN CONDITIONS AT 8000 FT TOP SPEED. 144 M.P.H. 2500 R.P.M. 515 B.H.P. CLIMB 85 M.P.H. 2250 R.P.M. 475 B.H.P. Bradbury, Wilkinson & Co. Ld. TOTAL B.H.P. ABSORBED AIRCRAFT SPEED M.P.H. SHORT BROS. LTD. ROCHESTER 2500 R.P.M. 2400 R.P.M. 2300 R.P.M. 2200 R.P.M. 2100 R.P.M. 2000 R.P.M. 1900 R.P.M. 1800 R.P.M. 1700 R.P.M. FULL THROTTLE CURVE η = .70 η = .75 η = .77 η = .78 η = .79 515 B.H.P 475 B.H.P 410 B.H.P 340 B.H.P ESTIMATED B.H.P. REQUIRED FOR LEVEL FLIGHT AT 16000 LBS ESTIMATED B.H.P. REQUIRED FOR LEVEL FLIGHT AT 13000 LBS ESTIMATED B.H.P. REQUIRED FOR OPTIMUM CRUISING CONDITIONS AT DIMINISHING ALL UP WEIGHT | ||