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Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

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Old 10-14-2007, 06:26 PM   #1
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diy recumbent

inspired by trebuchets recent efforts, I finally put something that could be called a recumbent together. It's a no-weld experiment but some cutting (grinder with cutoff wheel. I took the back triangle from a boys mountainbike and left a couple inches on the top tube so it could saddle into the fork (minor grinding on the fork for decent fit), then two ubolts with an extra bar going across them to pull the two together and smaller ubolts to hold the bottom of the fork to the triangle.

The second ride was a LOT easier than the first one




Still needs some work, need to get some more caster (arms get a workout just gliding), but happy it works as well as it does on the first try. That's a piece of 2x3 with a piece of stadium pad and a ubolt btw.

It went together in a couple hours.
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Old 10-14-2007, 06:29 PM   #2
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You're nuts, but I like it!

What kinda looks do you get?
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Old 10-14-2007, 06:43 PM   #3
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Awesome. Post video!
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Old 10-14-2007, 07:03 PM   #4
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Very cool!

Me rikey rots.
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Old 10-15-2007, 08:24 AM   #5
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Do you think the front wheel drive will help in snow?
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Old 10-15-2007, 08:26 AM   #6
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Definitely! He will be able to apply power to pull himself out of oversteer situations.
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Old 10-15-2007, 10:02 AM   #7
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Heh, I'm glad you guys like it

Snow?!? Yikes, I would bust my but in a hurry. I've done snow, and I have to slide my feet on the ground a lot in the stuff.

This thing is not the leisurely cruise I was hoping for, will have to try something like this next (or a fwd tilt trike)

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Old 10-15-2007, 11:50 AM   #8
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You scare me.
You do earn lots of creative points though!

Reminds me of building choppers when I was 7. Chopped off tubular forks below the crown and slipped the open end of one onto the drop out end of the other. The fork was 3 lengths long and S shaped. Good thing I was light, it was pretty rickety, not even bolted together. Glad I lived through it all.
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Old 10-15-2007, 10:08 PM   #9
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Quote:
Originally Posted by SVOboy View Post
What kinda looks do you get?
The most simple answer to that question is... Yes....

Even on professional built 'bents you'll get "the look"

------
Totally cool skewbe Hows the pedal steer though? And looks like brake should be the next order of business (I know, I know - brakes are the last thing on my list too ).

That looks like a build that goes together too easily - so that almost no one else thinks to do it

-----
So for the stability... The problem is a combination of wheel sizes and lengthening the front fork.... You've got a lot of trail (caster) - possibly too much making strong arms required for steering... Hrmm, looking at it again - you've got a bit of negative trail (hub behind steering axis) -- the picture is kinda deceiving without putting a straight edge to it Is it trying to center by twisting the wheel 180 degrees?

I'd flip the pink fork around to attempt to restore the original steering geometry... You should be able to loosen the stem and flip it around to keep those handle bars nearby

And if that bike isn't quite pink... my apologies (I'm a bit color blind when it comes to reds )


I've been meaning to post the almost final iteration of that monstrosity I posted a few weeks ago Soon
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Old 10-16-2007, 01:37 PM   #10
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Quote:
Originally Posted by theclencher View Post
i''ye wonder about putting the power to the ground as the only things opposing each pedal thrust are resistance to acceleration and your arms. since legs are stronger than arms you must have to learn to really pedal gently. in any case it's prolly a great upper body workout. i thot bents generally gave the upper body a break?
Generally, you won't use your arms on a 'bent (other than steering and such) -- it's better on your back (in general) as your back has more support... Your legs also get a different work out as a different muscle set is used.

The only thing that sucks about a 'bent is hill climbing capability.... You can't stand up and use gravity to your benefit, so you have to compensate with smaller chain rings and larger cassette combinations.....
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