//for the jet power executive aircraft(CJ-1):
S=29.54;//wingarea(m^2)
D=1.225;//density at sea level(Kg/m^3)
W=88176.75;//normal gross weight(N)
Tf=16245;//thrust (N) provided by single turbofan engine
Cdo=0.02;//parasite drag coefficient
L_Dmax=16.9;//maximum L/D ,from example 6.13