function [T1_app] = T_1approx_W2(x,u,d,p,v,A)


T_2 = x(2);
T_d2 = d(3);
F_2 = u(2);
F_d2 = d(2);
F_1 = u(3);


T1_app = (T_2*F_2-T_d2*F_d2)/F_1;



end