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Unusual Home Built Recumbent

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Unusual Home Built Recumbent

Old 12-29-14, 06:24 PM
  #1  
Maybelater
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Unusual Home Built Recumbent

Here's some shots of a unusual and rather ingenious recumbent I spotted last fall. The owner told me he found it placed in a back lane for scrap pick up and at first he had a hard time figuring out what it was. It was fairly complete except for wheels and a seat. He pieced it back together and added a rear seat for his grand kids. The tillers steer the bike and also aid in propulsion. The owner let me try it out and it was fun but strange at the same time....
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Old 12-29-14, 07:27 PM
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That thing needs some blue Aerospoke wheels.
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Old 12-29-14, 08:41 PM
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That is seriously weird! Think of the time it must have taken to engineer and build that. I like it but I can't imagine where or how I'd ever use it.
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Old 12-30-14, 07:12 AM
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I still don't see how it's steered. The linkage goes down to the bottom of the frame... and then what??? The hand part of the drive seems to be mostly a waste of energy. He could ditch that and add a remote handlebar and it'd be a pretty cool trike.
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Old 12-30-14, 09:37 AM
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Originally Posted by BlazingPedals View Post
I still don't see how it's steered. The linkage goes down to the bottom of the frame... and then what??? The hand part of the drive seems to be mostly a waste of energy. He could ditch that and add a remote handlebar and it'd be a pretty cool trike.
I think that the hand drive levers rotate side-to-side on the roll axis. Then a linkage goes straight down to a bell pivot that drives the pitman arm.
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Old 12-30-14, 09:58 AM
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Total body workout! Be your own stoker.

I would certainly pull that out of the dumpster.

Is there a freewheel between the handcrank and the BB, or are the hand levers fixed to the cranks?

I think this could work ok if it was set up to pull from the arms while pushing with the leg on the same side.
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Old 12-30-14, 03:16 PM
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And I thought my Sun EZ Sport was heavy...
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Old 12-30-14, 08:21 PM
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My thoughts are that the steering is more of an over-engineered solution to a basic design problem. Given the super long wheelbase, high center of gravity, and narrow track I can only assume that the bike tipped severely on a turn at any manner of speed. Making the bike steer through a pivot almost forces the rider to shift weight safely(er) to the inside of the bike.
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Old 12-31-14, 03:26 AM
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Yeah I like it, It's Interesting.
After I rode it a while I get out the torch and cut that steering system off, then mount a Car type steering wheel, something off an old 1920's car....
I'd add a derailleur out front while I was at it. before it was over electric assist,,

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Old 01-10-15, 12:20 PM
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Looks like something I might try...but I agree the steering is not a good compromise in order to get the hand/arm exercise. Side to side motion to steer could throw you off balance with the extra motion of 'pedaling'...
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Old 01-15-15, 12:27 PM
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I've seen a combined arm/leg motion used before, but can't think where. It sounds good. In practice, it tends to be your heart and lungs that limit your power rather than your legs, so you don't gain much from adding the arm workout to the mix. If you want to work out your arms, ride your regular bike 80% of the time, then ride a handcycle for the rest.
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