Capt. Homesick. The manufacture's POH performance charts for C152 states that landing length is predicated at 54 knots over the fence (50ft) That is legal and quite safe and should be taught as the desired speed in calm wind. Exactly the same principle as a 737. The C150 POH states 52 knots with 40 flap. Legal and safe. Still 30% above the stall in landing config. These speeds would not be certified unless they were safe and capable of being flown by an average pilot. Boeing and Airbus aircraft use manufacturer's recommended threshold speeds, not individual instructors pet speeds. Why not the little Cessnas too?