We tried this in a 747-400 sim last month. Apparently the record is 1 min 34 secs from brake release to a full stop. We couldn't get it to less than 1.55 and that was at light weight, 60 degree bank at 100 feet all the way round, touching down at about the same place we rotated at. Need a long R/W. We used LHR. Might be fun to see someone do it for real!!!!