Go Back   EcoModder Forum > AltModding > Alternative Transportation
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-14-2009, 09:56 PM   #11 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 527 Times in 354 Posts
Frank -

Cool. Could this mean you're also a Green-neck? Or an Econeck?

CarloSW2

__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-15-2009, 01:15 AM   #12 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,561

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,512
Thanked 3,327 Times in 2,100 Posts
"You may want to consider a lower Cg to aid stability, but I believe you'll enjoy the recumbent position."

I've got about 2 block's ride time on a low store-bought bent. It didn't seem to have any stability advantage, and the starts and stops were more awkward.

"I DIDNT EVEN THINK THAT THERE ARENT ANY BREAKS!!!!!"

There are no breaks. She's solid as a rock!

"But I take it you did fire up the Sawzall on the donor bike,
which appears to have been a "boys" bike."

That is correct. Sawzalls rule!

"I suspect you had to pry the front fork tubes outward quite a bit to accept the
the rear wheel axle. I would expect something like 1-1/2 inches. That would
create a severe bending moment at the crown where the fork tubes attach to
the crown. Better keep an eye on that area for micro-cracking, in the
weld/silver solder, whatever."

I had to spread the fork legs for the additional hub width and I also had to spread the fork ends to accept the larger diameter axle- no grinding! I'd call the bending moment "minor" or "inconsequential". Of course on the back end I had to compress the frame to fit the narrow "front" hub, and the axle is small in the frame's slots but the axle nuts are holding it securely so far.

The "rear" frame stays going from the front hub to the handlbar stem (running right along the front fork) are redundant and will probably be removed eventually. I wanted to get a sense of the rigidity of that whole assembly before doing that.

"Green-neck or Econeck"

I think I'm a "Stiff-neck" after grabbing all those bike parts and bending them with bare hands! Oh yeah, I felt it later.
__________________


  Reply With Quote
Old 11-15-2009, 01:19 AM   #13 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
The lower Cg suggestion is from riding around on low-slung bikes... cornering "comfort" is increased for me when I'm a little closer to the ground. The recumbent position, for me, is still a bit awkward as well, but I'm getting used to it. (Not lately, since no one around here has one, and the local bike shops don't even sell them. Several haven't even heard of them.)
__________________
"żʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 11-15-2009, 07:13 PM   #14 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,191
Thanks: 179
Thanked 1,521 Times in 1,122 Posts
...heck, I thought a 'lower Cg' just meant there was "...less distance to fall..." when you crashed (wink,wink)!
  Reply With Quote
The Following User Says Thank You to gone-ot For This Useful Post:
Christ (11-15-2009)
Old 11-15-2009, 08:33 PM   #15 (permalink)
wdb
lurker's apprentice
 
Join Date: May 2008
Location: the Perimeter
Posts: 826

PlainJane - '12 Toyota Tacoma Base 4WD Access Cab
90 day: 20.98 mpg (US)
Thanks: 375
Thanked 179 Times in 138 Posts
Quote:
Originally Posted by Old Tele man View Post
...heck, I thought a 'lower Cg' just meant there was "...less distance to fall..." when you crashed (wink,wink)!
So Cg = Can-to-ground distance?
  Reply With Quote
The Following User Says Thank You to wdb For This Useful Post:
Christ (11-15-2009)
Old 11-15-2009, 09:18 PM   #16 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location: ˙
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 157
Thanked 266 Times in 209 Posts
You know I like it Frank.

lol, micro cracking "IN THE NEWS TODAY, MAN FALLS OFF POS BIKE!!"



"...records indicated a lack of magnaflux testing...no indication of termite inspection..."
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
The Following User Says Thank You to dcb For This Useful Post:
Christ (11-15-2009)
Old 11-15-2009, 09:43 PM   #17 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,049

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 54.01 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 73.57 mpg (US)
Thanks: 2,837
Thanked 5,698 Times in 2,944 Posts
Looks like a fun project, Mr Lee. Now I want a recumbent project too.
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 11-16-2009, 07:04 AM   #18 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,561

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,512
Thanked 3,327 Times in 2,100 Posts
Ha Ha- I was telling a friend about it, and that I'll probably be in the local paper. She said "In a good way or in a bad way?" I said "That remains to be seen"! LOL

As far as can-to-ground distance... there is a point of lowness where it gets awkward to put your foot down and save yourself; the same is true for launching I think. For me, this seat height is about perfect for that- not too low, not too high. I've read about guys having plenty of problems with higher (around 30") seat heights.

Metro, this is about the easiest way of getting into a recumbent without buying one that I've ever come up with. A little hacking, a little bending, and there you are. No welder or stuff to buy outside of the two donor bikes needed. I did it all from 2 a.m. to 3 p.m. in one day, and that includes digging through my parts bikes with a flashlight, and lots of standing there looking at it, deciding what to do.

Originally I was thinking of using the "his" from the matching his-n-hers bikes as the main chassis as it had a damaged top tube anyway. But in looking at it I decided the "hers" frame would get my seat height low enough and then I wouldn't have to weld anything. Not that I'm against welding, but to make a seatbase even lower than what I have would likely result in a weaker frame, and I didn't know where I was going to end up "fore and aft" at the time anyway. I was imagining problems with weakness in the head tube area. I can easily go an inch or two lower on this one too. Maybe I'll test that.

It may not be apparent from the pics, but the seatback angle and height are fully adjustable. I could lay it back probably up to 45 degrees. The best spec for that will gel as I get more riding time on it.
__________________



Last edited by Frank Lee; 11-16-2009 at 07:16 AM..
  Reply With Quote
Old 11-16-2009, 12:19 PM   #19 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 527 Times in 354 Posts
Frank -

I think at some point you should do an instructables or something. You could become the "Dobson" of DIY recumbents.

Hey, let's over-engineer it! You should have drop-down safety-wheels where the "normal" pedaling gear would be.

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 11-16-2009, 01:03 PM   #20 (permalink)
Master EcoModder
 
Join Date: Nov 2009
Location: Leadville, CO
Posts: 509

Maroon Ballon - '98 Chrysler Town & Country LXI
90 day: 26.42 mpg (US)

MaEsTRO - '95 Geo Metro 5spd hatch, 3 cyl
Thanks: 47
Thanked 54 Times in 38 Posts
I love this design! How did you do the joint between the seat post and handlebar stem on the two bikes?

I have factory made recumbents. A tadpole trike and a few 2 wheelers - long and short wheelbase, but I don't have any front drives. But I have a bunch of donor bike waiting in the wings to be reintroduced into action.

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
First ride on a (semi-)recumbent bicycle: BikeE - got a CCM Evox 120 MetroMPG Alternative Transportation 20 11-14-2011 08:29 AM
Video: nice little recumbent tadpole trike MetroMPG Alternative Transportation 7 09-30-2009 12:30 AM
JohnPR's oficial recumbent trike build thread johnpr Alternative Transportation 5 05-22-2008 12:50 AM
My Recumbent Thread - I found my 'bent trebuchet03 Alternative Transportation 4 12-31-2007 08:41 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com