Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

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.

Reply
 
Thread Tools Search this Thread
Old 09-13-09, 11:49 AM   #1
gavtatu
Senior Member
Thread Starter
 
gavtatu's Avatar
 
Join Date: Oct 2008
Location: the original jersey
Bikes: lowracer, highracer, moving bottom bracket, 2 tall bikesl
Posts: 286
new homebuilt lowracer

hi all, here it is, still warm from welding!
cut down racing forks to 20", muffler pipe bent to shape.
lets see how it carries on!
Attached Images
File Type: jpg bb 019.jpg (100.6 KB, 199 views)
gavtatu is offline   Reply With Quote
Old 09-14-09, 04:50 AM   #2
globalrider
BrooklynRocks
 
globalrider's Avatar
 
Join Date: Jun 2004
Location: Brooklyn, NY
Bikes: BikeE AT,Worksman Trike w/kidseating, Cannondale Mt bike, Counterpoint presto project, vintage Columbia Trike project, projects galore
Posts: 96
Looks like a nice job. Will the boom length be adjustable? Good Luck
globalrider is offline   Reply With Quote
Old 09-14-09, 10:04 AM   #3
gavtatu
Senior Member
Thread Starter
 
gavtatu's Avatar
 
Join Date: Oct 2008
Location: the original jersey
Bikes: lowracer, highracer, moving bottom bracket, 2 tall bikesl
Posts: 286
Quote:
Originally Posted by globalrider View Post
Looks like a nice job. Will the boom length be adjustable? Good Luck
no, its only for me, once bolted on, thats it!
can see already i`m gonna have some chain-line issues!
but it`ll all come together in the end!!!
gavtatu is offline   Reply With Quote
Old 09-15-09, 09:55 AM   #4
pathdoc
Hey let's ride.
 
pathdoc's Avatar
 
Join Date: Apr 2006
Location: Allen, TX
Bikes: Torelli road bike, Tsunami tandem
Posts: 2,002
Looking good. Please keep us updated on progress.
pathdoc is offline   Reply With Quote
Old 09-19-09, 07:27 AM   #5
Floyd
el padre
 
Join Date: Mar 2005
Location: Central Kansas
Bikes: Linear,
Posts: 1,485
Yep, looks like you are on your way to a comfy fast ride.
Floyd is offline   Reply With Quote
Old 09-19-09, 11:38 AM   #6
gavtatu
Senior Member
Thread Starter
 
gavtatu's Avatar
 
Join Date: Oct 2008
Location: the original jersey
Bikes: lowracer, highracer, moving bottom bracket, 2 tall bikesl
Posts: 286
here we go, one rolling chassis, chain line not too bad, managed to get bottom seat fixing and idler in one bracket.
finished temp hamster bars today, filled ali bars with sand, plugged and bent in vice by hand! do for now.
Attached Images
File Type: jpg rolling.jpg (50.4 KB, 137 views)
gavtatu is offline   Reply With Quote
Old 09-19-09, 11:41 AM   #7
linux_author
370H-SSV-0773H
 
linux_author's Avatar
 
Join Date: May 2005
Location: Penniless Park, Fla.
Bikes: Merlin Fortius, Specialized Crossroads & Rockhopper, Serotta Fierte, Pedal Force RS2
Posts: 2,750
fuggalicious!
linux_author is offline   Reply With Quote
Old 09-27-09, 07:52 AM   #8
gavtatu
Senior Member
Thread Starter
 
gavtatu's Avatar
 
Join Date: Oct 2008
Location: the original jersey
Bikes: lowracer, highracer, moving bottom bracket, 2 tall bikesl
Posts: 286
huzzah!
1 ridable chassis! just did 6 miles on this beautiful sunny morning!

all welding done, ali welding for hamster bars done, idlers and chain tubes done!
all runs reasonably quiet, gotta tinker with the gears a little.

so far, so good!
Attached Images
File Type: jpg smaller.jpg (89.7 KB, 158 views)
gavtatu is offline   Reply With Quote
Old 10-10-09, 10:08 AM   #9
gavtatu
Senior Member
Thread Starter
 
gavtatu's Avatar
 
Join Date: Oct 2008
Location: the original jersey
Bikes: lowracer, highracer, moving bottom bracket, 2 tall bikesl
Posts: 286
all derailleurs running nice now.
did my usual 10 mile mile circuit, 1 hill, 1 fast descent. hill, no prob, downhill, 38mph, so faster than my highracer.
on flat, 26 mph, def faster than my highracer, i`m very happy with that!
gavtatu is offline   Reply With Quote
Old 10-10-09, 02:16 PM   #10
globalrider
BrooklynRocks
 
globalrider's Avatar
 
Join Date: Jun 2004
Location: Brooklyn, NY
Bikes: BikeE AT,Worksman Trike w/kidseating, Cannondale Mt bike, Counterpoint presto project, vintage Columbia Trike project, projects galore
Posts: 96
Congrats

Nicely done, ride safe
globalrider is offline   Reply With Quote
Old 10-10-09, 04:52 PM   #11
charly17201
Senior Member
 
charly17201's Avatar
 
Join Date: Jan 2008
Location: Tulsa
Bikes: RANS Formula LE, Giant Escape 1
Posts: 583
Nice.

I'm not criticising, but curious for myself..... but that chain line looks mean. How's it do in cornering? I'm by no means an expert - and can't even say 'well versed', but what I've read I'd think you would have a lot of stress on the power side idlers. Any problem there? I want to eventually try building a bent from scratch (okay, almost scratch) myself.
charly17201 is offline   Reply With Quote
Old 10-10-09, 06:34 PM   #12
BlazingPedals
Senior Member
 
BlazingPedals's Avatar
 
Join Date: Dec 2004
Location: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, homebuilt recumbent
Posts: 8,727
Regarding the chainline, I'll throw my two cents in.

$0.01 - I think you are going to have some chain rub against the chainstay when you're in your higher gears. You could eliminate it by angling the chainstays up a bit from the old bottom bracket shell.

$0.02 - You're using a chain tube anyway, so you can get rid of the power idle on the boom and run the chain straight past the fork. But, if you do that, you'll probably have to bend or re-weld the shift tube back to give it the proper angle with respect to the new chain line.

You must have pretty long legs, considering the boom length. Maybe your *next* recumbent can be a dual-26 semi-lowracer!
BlazingPedals is offline   Reply With Quote
Old 10-11-09, 09:20 AM   #13
gavtatu
Senior Member
Thread Starter
 
gavtatu's Avatar
 
Join Date: Oct 2008
Location: the original jersey
Bikes: lowracer, highracer, moving bottom bracket, 2 tall bikesl
Posts: 286
cheers for the comments guys.
chainstays; no problen, under tension the chain lifts off the stay, so no problem there!
chainline; as with many other lowracers i`ve looked at, chain runs past tyre, so there is a little rubbing on tighter corners, but i`m learning how much, so not a prob either!
front idler; tried it without, but having both power and return chain hitting the wheel, and turning, didnt work so well.
circuit racing i can drop it, less of a prob there. on the road, this seems to be the best configuration.
i`m 6` 2", so i need a little length there, lol!
gavtatu is offline   Reply With Quote
Old 10-18-09, 06:15 AM   #14
gavtatu
Senior Member
Thread Starter
 
gavtatu's Avatar
 
Join Date: Oct 2008
Location: the original jersey
Bikes: lowracer, highracer, moving bottom bracket, 2 tall bikesl
Posts: 286
http://www.youtube.com/watch?v=_rtsO7lTPrg

me on a test ride this morning. really gonna have to stop test riding and get down to strip and paint!
gavtatu is offline   Reply With Quote
Old 10-18-09, 05:28 PM   #15
charly17201
Senior Member
 
charly17201's Avatar
 
Join Date: Jan 2008
Location: Tulsa
Bikes: RANS Formula LE, Giant Escape 1
Posts: 583
Looks like you were having a good ride. Congrats To windy to hear most of your comments though.

Question though, I though in video it looked like you had a single-ring crank, but the pics looked like at least a double-ring crank. Tell me you didn't do all that and give it a single.
charly17201 is offline   Reply With Quote
Old 10-19-09, 01:37 AM   #16
gavtatu
Senior Member
Thread Starter
 
gavtatu's Avatar
 
Join Date: Oct 2008
Location: the original jersey
Bikes: lowracer, highracer, moving bottom bracket, 2 tall bikesl
Posts: 286
Question though, I though in video it looked like you had a single-ring crank, but the pics looked like at least a double-ring crank. Tell me you didn't do all that and give it a single. [/QUOTE]

noooo, its a double, too many hills round here for anything else!
gavtatu is offline   Reply With Quote
Old 11-15-09, 02:31 PM   #17
gavtatu
Senior Member
Thread Starter
 
gavtatu's Avatar
 
Join Date: Oct 2008
Location: the original jersey
Bikes: lowracer, highracer, moving bottom bracket, 2 tall bikesl
Posts: 286
just a little update.
frame painted now, gotta add decals, treat myself to a few new componants, get it built up again and i`m good to go!
Attached Images
File Type: jpg 019.JPG (61.1 KB, 39 views)
gavtatu is offline   Reply With Quote
Old 11-19-09, 08:39 AM   #18
LWB_guy
Senior Member
 
LWB_guy's Avatar
 
Join Date: Apr 2008
Bikes:
Posts: 296
Awesome looking low-racer ! That's cool that you built it out of muffler pipe. Is there anything you'd do different if you were going to make another one ?
Is your bike comfortable? If you wanted, you could make it even faster by putting a mast into the front derailler post, bending it over your head, and covering it with something lightweight and transparent, like corrugated corruflute and polyethylene sheeting. Foul weather enclosure. That would force the air out of your way.
LWB_guy is offline   Reply With Quote
Old 11-19-09, 02:23 PM   #19
gavtatu
Senior Member
Thread Starter
 
gavtatu's Avatar
 
Join Date: Oct 2008
Location: the original jersey
Bikes: lowracer, highracer, moving bottom bracket, 2 tall bikesl
Posts: 286
Quote:
Originally Posted by LWB_guy View Post
Awesome looking low-racer ! That's cool that you built it out of muffler pipe. Is there anything you'd do different if you were going to make another one ?
Is your bike comfortable? If you wanted, you could make it even faster by putting a mast into the front derailler post, bending it over your head, and covering it with something lightweight and transparent, like corrugated corruflute and polyethylene sheeting. Foul weather enclosure. That would force the air out of your way.
no, built and works just how i want it too.
comfortable, yeah
i have some wheel discs to put on, and i will prob make a tail box
thanks for the compliments!
gavtatu is offline   Reply With Quote
Old 11-23-09, 03:00 AM   #20
gavtatu
Senior Member
Thread Starter
 
gavtatu's Avatar
 
Join Date: Oct 2008
Location: the original jersey
Bikes: lowracer, highracer, moving bottom bracket, 2 tall bikesl
Posts: 286
just a quick pic, till i can get out and
do some nice shots!
Attached Images
File Type: jpg low paint.jpg (99.4 KB, 40 views)
gavtatu is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 01:29 PM.