Not very technical and probably of no help, but back in the day I replaced several VR’s on small trainer airplanes. As matter of fact, in the ‘70’s we used to go to the local KMart and get a Ford VR and it fit perfectly. The only difference I was aware of between an auto VR and a aviation VR is that the springs were stronger to keep the points from fluttering at pressure atltitudes but those old trainers never went above 3,000ft. anyway so we figured what the heck. There also was an extra circuit inside the VR connecting the points which is probably what is being referred to. Another difference was the price, KMart Ford VR was about $7 and the Cessna VR was about $80 at the time.
I’ve changed a few VR’s on tractors over the years and it seems like the ones I have changed are on tractors that sat unused for a long time. I don’t know if I have ever changed one on a tractor that was used regularly.
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Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
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