02-07-2010, 04:41 PM
Awesome idea and very helpful. I was thinking along the same lines, but to start from scratch with an old lawn mower or any old B&S engine. You have solved the clutch problem for me since I never thought of using a chain saw clutch, thanks.
Driving the bit directly off of the clutch would be ideal. The clutch may need to be modified for a lower stall speed which would allow you to bog the engine down and not have the bit whirling too fast.
As far as the direction of rotation and the high rpms, you might be able to use some bicycle stuff to get the bit speed right with sprocket ratios while still using the bar. I think folks are visualizing the cutting chain that would be replaced by bicycle type chain and I'm feeling safer already, far removed from the horror movie genre.
If spin direction is a problem, you might have to use the spocket bar configuration. A square hole in the center of the tip sprocket lets you turn either way by flipping the chain saw over, not that you need reverse.
If I see someone out on the ice with such a contraption, I will know it is you and stop by to check out your design. Good luck.
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Driving the bit directly off of the clutch would be ideal. The clutch may need to be modified for a lower stall speed which would allow you to bog the engine down and not have the bit whirling too fast.
As far as the direction of rotation and the high rpms, you might be able to use some bicycle stuff to get the bit speed right with sprocket ratios while still using the bar. I think folks are visualizing the cutting chain that would be replaced by bicycle type chain and I'm feeling safer already, far removed from the horror movie genre.
If spin direction is a problem, you might have to use the spocket bar configuration. A square hole in the center of the tip sprocket lets you turn either way by flipping the chain saw over, not that you need reverse.
If I see someone out on the ice with such a contraption, I will know it is you and stop by to check out your design. Good luck.
[signature]