I have a PK80 2-stoke motorbike, but I am planning my next powered bike. There is a video on Youtube of a guy who took a weedwacker engine, and attached a large RC airplane prop to the shaft.
I can't post a link, but look up "bicycle with weed wacker engine and propeller" This is cool beyond words! My next project is going to be a 4-stroke engine....I have a Cub Cadet CC4105 BENT-SHAFT weed-wacker which I could use for the project. Problem is this guy used what I guess was a straight-shaft weed wacker and put a 1.5:1 edger converter (45deg. angle) onto the end of the cut-down shaft. If I am understanding correctly, he has the prop geared up to turn 50% faster that the engine shaft. So I am thinking that if I just take the trimmer head off my weed wacker and attach a similar prop, it might not generate enough thrust, as it is only spinning at engine speed. So to be sure my installation will work well, I would need to know what RPM that 17.5 in prop is turning, as well as the pitch of the prop he used. I think also I would put a cage around the prop for safety...imagine what could happen if someone with long hair rode on it and leaned back a bit too far!
YouTube - Bicycle with weed wacker engine and propeller
I can't post a link, but look up "bicycle with weed wacker engine and propeller" This is cool beyond words! My next project is going to be a 4-stroke engine....I have a Cub Cadet CC4105 BENT-SHAFT weed-wacker which I could use for the project. Problem is this guy used what I guess was a straight-shaft weed wacker and put a 1.5:1 edger converter (45deg. angle) onto the end of the cut-down shaft. If I am understanding correctly, he has the prop geared up to turn 50% faster that the engine shaft. So I am thinking that if I just take the trimmer head off my weed wacker and attach a similar prop, it might not generate enough thrust, as it is only spinning at engine speed. So to be sure my installation will work well, I would need to know what RPM that 17.5 in prop is turning, as well as the pitch of the prop he used. I think also I would put a cage around the prop for safety...imagine what could happen if someone with long hair rode on it and leaned back a bit too far!
YouTube - Bicycle with weed wacker engine and propeller
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