h a l f b a k e r y
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Chainsaws are dangerous (you didn't
that). Amongst other things, they can
"kickback". As I understand it, this is
happens when the blade gets stuck,
causing the saw to be flung back onto
operator. Chainosaurus Rex solves this
Chainosaurus Rex does this because
two, almost touching, parallel blades
turn in opposite directions.
anti-kickback nose guard
[nuclear hobo, Aug 08 2007]
||...so, depending on which blade gets stuck it will get thrown at you or away from you? You've increased the unpredictability of the chainsaw by increasing its cost, weight, and energy consumption.
||Much better would be to have some kind of hydrolic shock absorber connected to an arm that led to a metal armour plate in front of your shoulder and chest. In the event of a kick back the chainsaw rears back towards you but the shock absorber slows it and, in case of a particularly violent kick, the metal plate protects your limbs.
||Oh dear - "always with the negative
vibes" (Donald Southerland - Kelly's
Heroes) - it can't ever get stuck due to
the combined shredding action of the
two opposing blades. As for weight,
power etc - practicalities have never
been a big priority for me, but one
motor will do all - and twice as quick,
so it probably saves energy. Thinner
blades, that don't have to be as strong
because they can't get stuck, will bring
the weigh down to "normal" - and of
course it's guaranteed never to cost an
arm and a leg.
||I ddon't know, it sounds like it might work. Definitely worth some research.
||Chain brakes are pretty much standard now, kickback occurs when the nose hits and grabs -chain going one way propells the bar that it runs on in the other- it is nasty to experience even with the brake - and this idea would eliminate it, so top work! May have some issues with chains coming together -or jamming if you ran them too far apart. Might make it hard to get out if jammed while felling - wider kerf would be harder to wedge, but still good idea.
||//it can't ever get stuck due to the combined shredding action of the two opposing blades//
||Consider the case of striking a nail exactly at right angles to the two sawchains. It lodges between the teeth of chain A and chain B, decelerating them to zero. Seems like this is a recipe for the spontaneous disassembly of your spensive new chainsaw.