h a l f b a k e r y
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Hand pedaled bikes are well known, as are rowing machines that incorporate the arms into powering the bicycle.
This is a different suggestion for an arm and leg powered bicycle that utilizes both arm and leg cranks, which have come to be standard in bicycle design.
However, in this design the
hand crank transfers output power not to the wheels directly, but to the legs of the rider via two padded elliptical or eccentric gears. A slight change in convention, further integrating the rider into the machinery.
Elliptical or eccentric gears are used in order to remain pressed against the legs of the rider, for the entire duration of downward and upward motion of the cycling.
When mounting this bicycle, the rider puts both feet on the pedals per usual but in such a way that each of the quadriceps are pressed against their corresponding elliptical gear.
When riding this bicycle synchronicity is required between the hand and foot cranks, as the ergonomic design of the ellipses would be prohibitive to foot pedalling alone.
Full Body Bike
http://www.stanford.../BodyBike/Bike.html
Interesting Steering Solution [rcarty, Oct 22 2006]
rowing machine hpv
http://www.humancar.com/
kind of scary steering solution. [Zimmy, Oct 22 2006]
[link]
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There are mechanisms for steering hand crank bicycles. I will link to some. |
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However, steering is not my biggest concern. Cycles that hold the land speed records do not have steering capability. Nor do cycles that are capable of flight. |
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The subset of HPV fliers and HPV speed record machines is pretty small. Is your idea specifically for this? No negative feelings if it is, I just wanted to know. |
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Ideally this would be for velodrome conditions, but steering shouldn't be ruled out. |
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(+) I posted a link to some people who look to be very serious about hpv's. I had a very nice racing / touring bike when I was growing up that I would have loved to take into a velodrome - there just weren't any. I now live within a mile of a very nice one, but I no longer have a bike. |
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The concept of building a 2-4 person human powered "car" has been in my mind for the last week or so. I was figuring on maybe taking it up as a hobby, but the ones that have been built and are for sale cost as much as a cheap car - so I am set back for a bit. |
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"However, steering is not my biggest concern. Cycles that hold the land speed records do not have steering capability. Nor do cycles that are capable of flight" |
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Um, what? They all steer. They don't steer sharply, but they do indeed steer. |
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The first steering solution that pops into my head is a center bearing design, where the entire front half of the vehicle turns, like a large agricultural tractor. That may not work due to interference between the two drivetrains, however. You'd constantly be trying to knee the bike one way and then the other. |
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The one thing I really don't like about your concept is how you describe the system augments the legs, rather than providing more effort directly to forward motion. This requires having parts pressing down on your legs, effectively locking them into position on the pedals. I can handle toe clips and clipon shoes, but how exactly do you fashion a quick-release for this setup? Eventually the bike must stop, sometimes in an emergency, and it looks to me like this bike would rather you fell down. |
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(+) for concept and possibly skipping past a lot of extraneous gearing on the head of the bike, (-) for strapping me to the future wreckage. |
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//Eccentric Crank Bicyclist// Each time I see this title I think someone is writing unkind things about me ...again. |
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