Posted by Rootsy on May 11, 2009 at 13:10:29 from (24.247.111.162):
In Reply to: Farmer killed posted by thurlow on May 10, 2009 at 06:56:12:
You're in luck... I am an engineer by profession... Farmer by birth...
A chain is nothing but a bunch of smaller rigid rubber bands intertwined. Each link, when pulled on deforms and stretches... such a small amount that you cannot visibly discern it... It also takes A LOT of of force to stretch it that small amount... A chain under tension to the point of yield has so much potential energy that it is literally a loaded gun. All it takes is for one of those links to be stressed such that it surpasses it's yield point and is pushed enough to rupture... All of those individual links under great stress and strain contract as the energy is released and that is why chains will come back at their anchor point many times... Wrapping a rag around em or throwing a blanket over them, is used to absorb energy should it be released suddenly during a failure of a link... Once that chain gets moving it has quite a bit of inertia and they act just like a whip...
When i was a young boy I saw my father take a binder handle between the eyes... He snapped it and she didn't quite cam over and he wasn't using a pipe like he should have been... came back and that ball at the end of the handle left a 22 stitch gash...knocked a 240 lb man out cold... Happened so fast I didn't even see the handle reach out and touch him and come back to rest... I was standing right there and saw the whole thing happen... Remember it clear as day... Thought he had had a heart attack until i saw all of the blood.
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Today's Featured Article - On the Road with Dave Gohl: Auction Musings - by Dave Gohl. I was thinking the other day about all the auctions I've been to in the last few years. There've been many. Some have been very good, some have been well, disappointing to say the least. But no matter how good or bad auctions may be, we always seem to stay until the item we've come for or are interested in is on the block. I've been to some auctions near and far. I think the furthest has been the Two Cylinder 7 in the Amana Colonies last year. Lots of stuff, lots of people. I've also atten
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