function ans = dashtime_int(V)
	T = 17000;
	W = 18200;
	g = 32.2;
	rho = 0.00176;
	S = 338.29;
	CD = coeff_drag(V);
	
	D = CD .* 0.5 .* rho .* V .* V .* S;
	ans = W/g ./ (T-D);