//consider wind tunnel model of example 7.3.datas are taken from example 7.3 and 7.4
Hac=0.24;//distance of aerodynamic center from leading edge
a=0.08;//lift slope
Vh=lt*St/(c*S)//tail volume ratio
at=0.1;//tail lift slope per degree
de=0.35;//derivative of downwash angle w.r.t angle of attack