Homemade Recumbent

mitchj
Posts: 91
Joined: Tue Aug 05, 2014 3:46 pm
Location: Renmark
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Homemade Recumbent

Postby mitchj » Wed Oct 28, 2015 9:44 pm

G'day all;
The other day I was looking for tricycle plans on the 'net, but kept coming up with lots of recumbent plans. One of these caught my eye though - a Flipped Frame Recumbent, by Keith Moss at http://www.bentrideronline.com/messageboard/showthread.php?t=74982. It looked like a reasonably easy thing to make so I had a go.
I started out with these-
Image
& ended up with this- A 7-1/2 foot long ripper!
Image
This was 3 days work (probably 1-1/2 if I knew how to weld properly...) & is obviously still a work in progress. It uses the flipped rear end & top tube of a ladies MTB, & the flipped front end & BB of a mens MTB. A bar along the bottom & some bits from the junk pile, & that's basically it!
Keith said it was an easy & comfortable thing to ride, & he was right. I was riding it up & down the road for ages on Sunday arvo - It's great! It still needs gears, brakes, a proper seat & better wheels. I'm working all that out at the moment. I may even put a small jockey wheel at the bottom of the seat tube, to keep the chain up a bit. When I get all that done & it is running nice & smooth, I will strip it to bits, paint it & re-build everything.
Hopefully in a few weeks I'll have some pics of it all finished!

just4tehhalibut
Posts: 1152
Joined: Thu Oct 23, 2008 5:02 am
Location: Spearwood, WA

Re: Homemade Recumbent

Postby just4tehhalibut » Thu Oct 29, 2015 8:56 am

Before you paint I'd consider welding one more tube into the frame, going from the bottom bracket up to the toptube and at an angle that would allow a front derailleur to sit at the correct orientation. Even if you don't want a front derailleur this tube will provide a bit more stiffness to the front of that 'main triangle', the bit that has to handle the stresses from your pedalling and steering, as well as making the frame a little stronger by providing support for those long tubes between where your weight sits and where your inputs to the pedals and bars meet.. A LWB like you've built will always be a comfy cruiser, you won't be compromising the ride by adding this support tube but you will get better handling.

And, as I found out the hard way on my recumbent trike, having no front derailleur at the end of a long chain run meant the chain would often pop off the front chainrings over bumps and speedhumps. The trike had a jockey wheel halfway along the chainrun and some chaintubes, still didn't help more than keeping the chain off the crossmember tube.

You're way ahead of me, I've built up a good collection of CrMo frames to cut up to make a LWB, could have built one anytime in the last 4 years, just can't get motivated.

mitchj
Posts: 91
Joined: Tue Aug 05, 2014 3:46 pm
Location: Renmark
Contact:

Re: Homemade Recumbent

Postby mitchj » Thu Oct 29, 2015 9:08 pm

G'day just4tehhalibut;

Thanks for the suggestions mate - always happy to listen to advice! I was thinking of adding that tube weather I added a front derailer or not.

}SkOrPn--7
Posts: 2399
Joined: Sun Oct 12, 2008 7:15 pm

Re: Homemade Recumbent

Postby }SkOrPn--7 » Fri Oct 30, 2015 8:44 pm

Great build perfect chain line for a home made under/over idler to take away some off that chain sag. I agree with just4tehhalibut about the added tube it would solve many issues down the track.

Ricky

Recycler
Posts: 236
Joined: Sat Dec 22, 2007 11:32 am
Location: Woolgoolga NSW

Re: Homemade Recumbent

Postby Recycler » Wed Nov 04, 2015 5:05 pm

G,Day Mitchj, Great minds think alike, here is my masterpiece.
Image

mitchj
Posts: 91
Joined: Tue Aug 05, 2014 3:46 pm
Location: Renmark
Contact:

Re: Homemade Recumbent

Postby mitchj » Tue Nov 10, 2015 6:23 am

Good stuff Recycler! I like the curved down tube, I was looking at some ladies racer frames the other day with the curved top tube & was wondering if I could use them in a future project. I guess you can use anything if you think about it a bit! The rear end of your bike looks interesting too.

Recycler
Posts: 236
Joined: Sat Dec 22, 2007 11:32 am
Location: Woolgoolga NSW

Re: Homemade Recumbent

Postby Recycler » Tue Nov 10, 2015 7:44 am

Ladies bike frames are great for this type of build. I turn the frame upsidedown, put the forks in and you can get new ideas.
The rear end is a front fork on top of a rear fork.

Arakasy
Posts: 74
Joined: Tue Jul 15, 2014 8:21 am

Re: Homemade Recumbent

Postby Arakasy » Mon Nov 30, 2015 10:11 am

Nice work guys.... But you need real seats :mrgreen:
Gets the whole recumbent thug life feeling going on 8) :lol:
Don't Panic
And I don't know
Ride casual... Not to casual
They might snap out it's comfortable !!

Recycler
Posts: 236
Joined: Sat Dec 22, 2007 11:32 am
Location: Woolgoolga NSW

Re: Homemade Recumbent

Postby Recycler » Mon Nov 30, 2015 4:25 pm

I would call these type of bikes Pedal Scrapers.
They are fun to ride, I have a 3 speed - coaster brake set up on mine. :D

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