When I was doing my PPL on a C 150 we had the flaps fail full down ( 40 deg) on the go around after a PFL. Terrain was 900 feet ASL and the temp was 30 deg C. The instructor told me to go around at about 200 feet AGL. At full power the aircraft would just barely maintain altitude. We flew the 10 miles back to the airport dodging towers and arrived for the overhead join still at 200 feet.
IMO there is no reason to ever go to flaps 40. If flaps 30 won't allow a comfortable approach you should go find a better runway.
Last edited by Big Pistons Forever; 15th January 2013 at 04:59.