That is EXACTLY what I was trying to explain. Jerry was able to orate it in one sentence. Jerry if you thumb back to my explanation, you'll see we are on the same page.
Willard, this is what we are discussing. Feel free to tell both Gerry and I we are delusional if you believe we are. The riddle at hand is "what are some ideas about why its easier to throw a chain while back chaining with a loose chain?"
Also, a loose chain can jump off a bar without being in wood. Ive have revved a saw with a loose chain many times and had the chain jump. Granted, it has to be a very loose chain, but it can and does happen.
I would give a little more thought to what I suggested before denying it. When the chain meets resistance on top of a bar with slack in the chain, a motor pushes the chain forward while wood attempts to slow it. Take a twig and put and index finger on the butt of each end and push gently. Notice...
I believe that the chain jumps the bar more easily while backchaining for this reason. The bottom of the bar has chain in motion that are being pulled towards the head of the saw. Like a train pulling its cars from the front. The chain on top of the bar is being pushed. Similar to a line of...
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