AIRPLANE PERFORMANCES — HAMLIN AND SPENCELEY 445 



FiGXJBE 12.— Ram-jet airplane. Gross weight, 10,000 ; wing area, 130 ; launching 

 W/S, 77 ; landing W/S, 42 ; wing section, 65-110 ; aspect ratio, 6 ; wing incidence, 

 1.0°; fuel load— gal., 655; fuel load— lbs., 4,400; wing span, 2S' ; fuselage 

 length, 28' ; vertical height, 12'4". 



Figure 13. — Rocket airplane. Gross weight, 13,500 ; wing area, 130 ; take-off W/S, 

 104; landing W/S, 40; wing section, 65-110; aspect ratio, 6; wing incidence, 

 2.0° ; fuel load— gal., 985 ; fuel load— lbs., 8,200 ; wing span, 28' ; fuselage length. 

 32'8" ; vertical height, lO'lO". 



In the design of the ram-jet airplane, the combustion chamber cross- 

 sectional area dictates the fuselage size. Because of high fuel con- 

 sumption 44 percent of the launching gross weight represents fuel 

 carried in both the fuselage and wing. Kerosene is assumed as fuel 

 carried in self -sealing tanks. Since the flight duration and range are 

 limited, this airplane is adaptable only to defensive strategy, and, if 

 self-sealing tanks are eliminated, a consequent improvement will be 



