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//for the CP-1(datas from example 6.1a):
b=10.912;//wingspan(meter)
S=16.165;//wingarea(m^2)
AR=b^2/S;//aspect ratio
D=1.225;//density at sea level(Kg/m^3)
Cdo=0.025;//parasite drag coefficient
e=0.8;//oswald efficiency factor
W=13127.5;//normal gross weight(N)
P=230;//power provided by piston engine (unit-horsepower(hp))
Pf=0.8;//propeller efficiency
Pa=P*Pf*746/1000//maximum power(KN-m/s),1hp=746 N-m/s
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