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A bicycle powered chainsaw (long)(6 posts)

A bicycle powered chainsaw (long)stinkfoot247
May 17, 2003 8:13 PM
I thought of this crazy idea of building a chainsaw powered by a bicycle, I think it would be cheaper to buy a chainsaw, but I like a challenge. It would be impossible for me to explain the whole contraption I'm thinking of and I can't provide a picture of my drawings cuz I don't know how to convert bitmap files to jpeg. oh well.
This is what I want you to focus on though: think of a bicycle hub and cassette. On your standard bike the hub moves on bearings and the axle stays still. What I want to do Is have a axle running off the hub (the axle will be the hub) to power the contraption. therefore the axle has to move. So I'm thinking of having a a steel bar replace the hub. My problem is the cost of having a special cog fabricated so it will lock in the axle by means of a key. not a key, for your door but the other key. What I'm asking is, would it make sense to do it that way or have a sprocket/pulley/ something welded to the middle of a regular hub that hooks up to an axle elsewhere, just to keep away from the hassle of having special sprockets fabricated and worrying about the spacing between the cogs. I'm not talking about a dura ace hub either, just a good ole beater hub.
So do I fabricate my own hub/axle/cogs or do I weld a sprocket/pulley/something to middle of hub. I hope you guys can understand all that.
re: A bicycle powered chainsaw (long)Bruno S
May 17, 2003 8:27 PM
I would first determine how much power you need. One Horsepower is about 760 watts. A fit rider can produce continously about 200 watts. Is that enough for the chainsaw?
the sawing may be a bit slow but...stinkfoot247
May 17, 2003 8:43 PM
dammit I'll make her work. I don't care if it takes a while to cut the log. I'll throw on an oxygen mask or something to increase the horsepower...hmmm, that's not a bad idea?
Are you bored??Alexx
May 18, 2003 7:18 AM
Or do you just have no life? Really, now, this has to be the most hare-brained idea anybody's posted here in months! I'm not even sure WHY somebody would want to do such a thing. Are you concerned about pollution? If so, buy an electric chainsaw. Be careful you don't cut a finger off!
May 18, 2003 8:58 AM
I'm not concerned about pollution. I don't know I just thought of the idea one night because I'm living with my grandma out in the boonies, and I began cleaning her property up, out of complete boredom. The logs have accumalated and need cut. I could buy/borrow a chainsaw, but I like the challenge of trying to design and build something incorparating the bicycle. I'll show you guys a pic of it when I'm done.
Quick solution: USE AN AXE!!! (nm)Alexx
May 18, 2003 10:51 AM