Thigh length varies with the aeroplane. They all vary.
Designers will usually work on the ninety-fifth percentile of human measurements.
Sitting in a particular aeroplane it often appears that you won't clear the instrument pane and/or windscreen rail.
I had this impression in the Lightning but flew it.
Newt might tell you more since he threw one away.
He's about my height but nowadays bigger in girth.
