I realise this isn't what you asked about but I have used a couple of transport category AFMs that state touch and go landings shouldn't be performed on runways shorter than the ASDR distance + Takeoff distance required.
Seems reasonable in those types, a bit of fumbling with retrimming etc and the rwy end gets bigger way too quick.
Last edited by Fred Gassit; 2nd Sep 2012 at 23:51.