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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 03-13-04, 09:36 AM   #1
P.R.Moffatt
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Home-built

When you see the sketch I have made you'll all s******.
Anyway, I want a recumbant so I can go as fast as possible when traveling, the area is fairly flat here (+-12m for 50 miles), so suspension is not much of an issue. After having a heart attack at the prices of recumbants I sat with a clinical eye looking at an old upright I have in the garage, I just wanted to know what problems this design will encounter, and any flaws you can see.



Told you you'd s******
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Old 03-13-04, 10:44 AM   #2
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Anyone?
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Old 03-13-04, 11:31 AM   #3
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cool

You really need to go to bentrider online however. This site doesn't see much recumbent activity. The WISIL site is also a must for any homebuilding projects.
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Old 03-13-04, 07:17 PM   #4
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Ah, a prone fully faired recumbent? A bit of info on them from Goggle

http://www.bike-on.com/newhandcycles...eptsJPR200.htm

http://www.quivite.demon.nl/html-bes...edenis-gb.html

http://www.bicycleman.com/History.html

http://www.speedbikebgl.de/pix/ruk10s.jpg

http://www.bikeforums.net/showthread...301#post419301

http://www.geocities.com/rcgilmore3/prone.htm


Unless your building a rear stear bike, and your arms are above your head, then Im going to s******...
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Old 03-13-04, 07:21 PM   #5
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So what are you waiting for? get building! And post some pics of it!
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Old 03-14-04, 08:13 AM   #6
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Thanks guys, I'm just sorting out some stuff in the garage, there doesn't appear to be anywhere that deal/builds these around here, so I'm relying on you guys for guidance
Will post piccys when I start.
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Old 03-14-04, 11:00 AM   #7
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Good luck!
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Old 03-14-04, 11:11 AM   #8
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And no giving me guidance such as "Your frame should be bannana shaped" so that I go round in circles
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Old 03-15-04, 01:07 PM   #9
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Anyone know of some decent wheels for around 30-40 ($60-$80), as these look a little worse for wear after sitting in the garage (18" chromed steel, a bit rusty)
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Old 03-26-04, 03:26 PM   #10
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Right, one dremel with a wire brush attachment and an afternoon waxing have sorted the wheels out, im thinging of stretching the design furthur though, and having my head 3-5" behind the front wheel, lying flat about 3" up from the shell, the wheels will be encased seperately to improve aero and stop me grinding my face . Problem is - forward visability; is a 1.25" thick wheel going to impair it that much, or should I revert back to the head over front wheel approach? (I would host pic, but the comp. with it on has just gone pop so it needs rmaing)
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Old 03-26-04, 08:57 PM   #11
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That reverse front fork could be unstable at higher speeds. Anyone who has scooted around the supermarket on a shopping cart would be familiar with "high speed wobbles". There is a tadpole trike called the Sidewinder that shares this reverse-fork configuration in its rear steering wheel.
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Old 03-26-04, 11:08 PM   #12
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"So what are you waiting for? get building! And post some pics of it!"

having read a bunch about recumbent bike design, i would get planning instead of getting building, if this was my design.

if you mean it as a rear-steer design (rider on his back, feet forward) then your design will be no good. balancing and steering won't work out.

if it's meant to be a head-first recumbent... for one thing, be sure you don't have your knees banging the ground! for two... i've read that the ((rider head-first, belly-down)) design is something that's been tried, though not very many times. thus far, nobody's made a head-first recumbent bike that's very good. you should only try it if you're willing to accept that there's almost no chance of it working well on the first try, and a fair chance that your head-first bike will never be as good as a feet-first recumbent.

the fastest head-first bike happens to be one where the rider faces backwards and is able to see forward only with a mirror. i don't think anybody would even consider using it outside the context of a 1-bike-at-a-time drag race

here's a site that will let you know what kind of rear-wheel-steer bikes are known to be miserable failures and which kinds work.
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Old 03-27-04, 05:26 AM   #13
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Front wheel steer - if im sat behind the front wheel I'm gonna have the front fork normally orientated - so I don't have to extend the frame too much.
Not really bothered if its worse, its different and its cheap
Like I said, I'll put up another MsPaint masterpiece when I fix the other Comp. Thanks for your help guys, you're really useful
Like a kind of intellectual oxy-acetalene.
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Old 03-28-04, 04:16 PM   #14
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Not bad, not bad alt all. I'm in the process of building one too. I must have a "thousand" drawing doodles.
I have a bad back (Spinal Stenosis) complete with lag screws and bars.

Got an idea and I just get the missing peices wherever I can find them, garage sales, hardware stores, Home Depot, and a little known helper. Alumiloy... It's expensive, but worth ever penny.

Good luck

If you need my address reply thru bike forum.

Jim
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Old 03-30-04, 07:57 AM   #15
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Wish I had any "pennies" whatsoever, anyhow, will be free to start work in a few months (exams, then freedom before uni), will get some photo's of the piece of junk I start with, and the bigger pile of junk I end up with.
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