The 3010 should have been enough torque to fly your Taylorcraft. And I doubt they failed on takeoff. The servos have plastic gears and probably stripped upon impact. Big scale control surfaces have a lot of inertia when hitting something solid and that force can easily strip plastic gears. Since you made 2 laps and then a slow roll to the water would indicate to me a battery failure. And you said "the trim" couldn't correct the roll. You did apply aileron for correction?? And don't count out that something got wet and quit working.