<p>in cases where you want to say mu is greater than one, that is usually better described as adhesion; at any rate you cannot make mu as high as you want.</p>
<p>the frictional force acting on the airframe is proportional (with a small constant) to the frictional force on the wheel because the bolts and axels, all the way up to the airframe, cannot be absolutely perfect.</p>
<p>Sorry mate, you aren’t going to win this one. I understand that you object to the whimsy of what I’m saying, that’s why I prefaced it many times… Why can’t you just accept that you are talking about the problem from a practical perspective, and I am talking about it from an innate perspective, related to the actual complexity of the problem.</p>