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Recumbent What IS that thing?! Recumbents may be odd looking, but they have many advantages over a "wedgie" bicycle. Discuss the in's and out's recumbent lifestyle in the recumbent forum.

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Old 03-28-12, 02:18 PM   #1
trikeboy
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home made Recumbent need help

Hi, I want to make a home made Recumbent. I need help of knowing what the lengths of the bars are and angles. if you can help me id like that very much. I found these videos of people building them

http://www.youtube.com/watch?v=5jWzp...eature=channel

http://www.youtube.com/watch?v=T5YuS...ure=plpp_video

thanks
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Old 03-28-12, 04:45 PM   #2
gcottay
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There is an active homebuilders forum at BentRiderOnline.
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Old 03-28-12, 07:27 PM   #3
BlazingPedals
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Trikes are more complicated than 2-wheelers, but I think you're over-thinking it already. Think about where the chain will go and how you will link the front wheels. I have heard that the head tubes should point at the contact patch and that the trail values you'd want for a 2-wheeler are still valid. Beyond that, cut and braze, man! Oh, and ask in the builder's section when, not if, you mess up. I think the first two or three will be learning experiences.
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Old 03-29-12, 01:45 AM   #4
gavtatu
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http://www.atomiczombie.com/

i just eye `bikes` off pictures, and work from there, but `trikes` are slightly different, the maths required are more than i care for, lol !
and bentrideronline homebuilders is EXCELLENT !
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Old 03-29-12, 03:27 PM   #5
trikeboy
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thanks guys!
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Old 05-23-12, 09:02 AM   #6
JGaerlan
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Here's a trick I learned from a motorcycle DIY forum.
Get a good side view pict of the bike. Measure the diameter of wheel. If you know wheel's dia is 20" (say a 406 wheel), and you measure the dia of wheel in pict is 40mm, then your conversion factor is 20/40 or .5"per mm.

So if you measure the wheelbase in the pict as being 76mm, then you can extrapolate it to be 76 x .5 = 38"

For head angles, seat angles, etc - just use a protractor (is that what you call the semi circle ruler with angles on it ?). Sorry for an alzheimer's moment.

THis method has worked well for us.
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Old 05-28-12, 02:28 PM   #7
trikeboy
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Quote:
Originally Posted by JGaerlan View Post
Here's a trick I learned from a motorcycle DIY forum.
Get a good side view pict of the bike. Measure the diameter of wheel. If you know wheel's dia is 20" (say a 406 wheel), and you measure the dia of wheel in pict is 40mm, then your conversion factor is 20/40 or .5"per mm.

So if you measure the wheelbase in the pict as being 76mm, then you can extrapolate it to be 76 x .5 = 38"

For head angles, seat angles, etc - just use a protractor (is that what you call the semi circle ruler with angles on it ?). Sorry for an alzheimer's moment.

THis method has worked well for us.
thanks!
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