Unable to solo
Two.
A gentleman who's father was head of 'secret police' for a north african state.
A young lady who was the perfect student, mind like Einstein, (home address in a palace), wonderful personality but she just could not fly.
Thats in about 3 thou instructing hours.
The first refused to accept the situation and always blamed it on the instructors (he got thru lots). Supprisingly he liked me even though I eventualy got him chopped - downwind, DME read 6, still heading on crosswind. That was after about 40 hours. He went on to train as an aircraft engineer. The lady was very realistic and worried about spending so much of her fathers money, she left voluntarily after about 18 hours.