Nicely done. In summer mid day or in the mountains or with two people, level in low ground effect energy can easily be 50% of total kinetic energy (fuel, ground effect, down drainage egress, etc.) available. I guess down drainage is actually potential energy of altitude, but I convert it to kinetic. I taught zero timers in the 7AC at Ag Flight and in the C-140 at Monte Vista Colorado at 7600.' I did not teach Vx or Vy as neither was appropriate. I taught when pulling back on the stick doesn't give us the climb we wish, try pushing instead. Nice airplane. It likes to takeoff fast and land slow. It can be landed slow enough that if we roll only a few feet first, a ground loop will not hurt anything. Lets the instructor safely teach dynamic proactive rudder movement, walk the rudder pedals, to stay ahead of the airplane. We're better when we move.
