I did a trial lesson with a blind person in his fourties - he lost his sight at the age of six - and of course once at altitude I handed over the controls to him. I described him what the plane was doing: climbing, descending and angle of bank. We ended up in a spiral descend each time and we both enjoyed it.
Then we flew to the river Thames and the QE2 bridge and the whole flight I described to him where we were and what I saw.
I also did a trial flight with a very heavy person to say the least, we had to do it in an Archer (4-seater) iso a Cherokee (2-seater really). I had a hard time reaching the trim (in between the two seats) because his belley was all over the cockpit.
It is a shame so little catwalkmodels find their way to our flying club for a trial lesson