Does the induced drag increase with an increasing air speed for a given angle of attack? Most graphs I found online seem to suggest that the amount of induced drag increases as the speed increases but they actually allow the AOA to vary so I was wondering for a case of fixed AOA(ground roll for take off), how the amount of induced drag will vary. Also for low speed RC airplanes, what is the biggest type of drag on ground roll before taking off? I think I read somewhere on the Boeing website saying that for bigger aircraft, up to 70% is the induced drag for take off but I am not sure if this was related to the ground roll phase or immediately after the plane has taken off. Thanks!