two minutes...!!!
you try training in a PA 38 Tomahawk behind a 757 also in the circuit...that is fun trying to get the sequencing right...
i did it for many years...and when we also had a 747 in the circuit as well....heavies to the right...PA 38 to the left...
apart for sequencing ...you get a pretty good idea of wake turbulance avoidence procedures....and hope..!!!
the dean.