<VV> Fuel Leak

Hugo Miller Hugo at aruncoaches.co.uk
Fri Sep 28 05:00:17 EDT 2018

Funny you should say that, as I was about to agree with you that it might indeed be the Coriolis effect at work. In truth I’m not sure what forces are at work that make wheel nuts do what they do, or more specifically why you are better off with a left-hand thread on wheels that rotate anti-clockwise. I’m even more surprised that somebody figured this out so early on in the days of motoring, since the whole concept of lug nuts didn’t exist before the motor car. 
Now tell me why RIGHT-HAND knock-off wheels have a LEFT-HAND thread on the spinners  

From: roboman91324 at aol.com 
Sent: Friday, September 28, 2018 4:20 AM
To: Hugo at aruncoaches.co.uk ; virtualvairs at corvair.org 
Subject: Re: <VV> Fuel Leak


Please excuse my last post.  Mechanical precession is exactly what is going on with left-side lug nut loosening.  I assumed you were talking about precession as it pertains to the dynamics of rotating mass.  I. E. gyroscopic precession.  I have always known it as epicyclic fretting.

By the way, mechanical precession is still a concern but the deeper tapered lug nuts added just enough friction to compensate.  In addition, the taper (acorn) itself, not just the added contact area, has been the solution to the issue in two ways.  First, the taper acts as a wedge which increases the applied force "N" in the frictional force equation.  Second, the taper allows for different diameters at different points of contact.  These interesting tricks of Physics were a game changer.

Again, my apologies,


PS:  I believe the rest of my posts to be accurate but you never know.
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