Project Catsarse II
Author
Discussion

Liquid Knight

Original Poster:

15,754 posts

212 months

Thursday 10th November 2011
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So the "if you build that I'll eat a cats arse" bike worked and the Lent Recumbent worked even better (sold for a tidy proffit as well I might add) I've decided to have another go at a front wheel drive recumbent. This time however I am not having suspension as it adds weight and am not going to be sitting on top of a "Y" frame mountain bike. Once again inspired by my mate Chris...

http://www.youtube.com/watch?v=ptYWHhfZCSY&fea...

http://www.youtube.com/user/ChrisLuxembourg

I'm having a go at something original a pivoting Lowracer.

Something like this...



...I have a simplified prototype design that I'll not post yet in case the end product comes out completely different. wink

So today I took a grinder frame that someone had kindly dumped in my garden...





...and using MMA due to the thickness of the box section (I'll do some cosmetic M.I.G or T.I.G welds over the top when I get time) the pivot is complete.



The plan is to retain the donor bikes gears so there will be no need for Chris's patented giant crankset. I'm looking for a Steel framed bike to use and haven't decided to go for 26 Inch or 700c yet. 26 atb parts would be easier to use on the road without suspension due to the tyre profile but 700c would be faster. Decisions eh?

I'll update this when I can as I work six days out of nine and have a few projects on the go.

Liquid Knight

Original Poster:

15,754 posts

212 months

Thursday 10th November 2011
quotequote all
In case you're new to the forum and don't know about the first two bikes...

http://youtu.be/LD3YilSABOo

http://youtu.be/IaCqiPAX0kE

...enjoy. wink

mybrainhurts

90,809 posts

284 months

Thursday 10th November 2011
quotequote all
Won't you have traction problems with front wheel drive and no weight over the front wheels...?

Liquid Knight

Original Poster:

15,754 posts

212 months

Thursday 10th November 2011
quotequote all
mybrainhurts said:
Won't you have traction problems with front wheel drive and no weight over the front wheels...?
That's why I'm thinking 26' wheels. Wider tyres. The MS Paint design I've posted is longer than the prototype plan as well.

mybrainhurts

90,809 posts

284 months

Thursday 10th November 2011
quotequote all
Liquid Knight said:
mybrainhurts said:
Won't you have traction problems with front wheel drive and no weight over the front wheels...?
That's why I'm thinking 26' wheels.
Blimey, that's beyond penny farthing territory...

Will you get under bridges...?..hehe

Liquid Knight

Original Poster:

15,754 posts

212 months

Thursday 10th November 2011
quotequote all
I'm aiming for the wheels to be the highest point.

Here's the first prototype draft...



...I've decided against this as the boom needs to be strong enough to take bumps and braking so the actual front end is now inverted.

Gizmo!

18,150 posts

238 months

Thursday 10th November 2011
quotequote all
Looks good. I've always wanted a go in a proper recumbent, although the last time I saw one I overtook him on the flat...

Liquid Knight

Original Poster:

15,754 posts

212 months

Thursday 10th November 2011
quotequote all
I having seat ideas again. Rather than spens silly money on a proper recumbent seat I was thinking of getting hold of an old exercise bike from eBay and using the seat from that. Something like this...

http://www.ebay.co.uk/itm/recumbent-exercise-bike-...

...should be better than an old office chair this time. wink

Liquid Knight

Original Poster:

15,754 posts

212 months

Friday 11th November 2011
quotequote all
Gizmo! said:
Looks good. I've always wanted a go in a proper recumbent, although the last time I saw one I overtook him on the flat...
Spookilly my old one has turned up on eBay again.

http://www.ebay.co.uk/itm/M5-Speedliner-Street-Leg...

I bought it second hand for £400 and sold it to a chap in Wales after my commute went from twenty six miles a day to a hundred and ten. While I wasn't using the bike as much I was looking at ways I could "improve" it and sold it before I got my grinder out. wink


Liquid Knight

Original Poster:

15,754 posts

212 months

Friday 11th November 2011
quotequote all

scubadude

2,619 posts

226 months

Friday 11th November 2011
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mybrainhurts said:
Won't you have traction problems with front wheel drive and no weight over the front wheels...?
Lots of FWD recumbents out there, tractions rarely an issue as weight distribution is often 50:50 or front biased on them- more common for RWD recumbents to have traction issues on bikes where weight is too far forwards!


Liquid Knight

Original Poster:

15,754 posts

212 months

Friday 11th November 2011
quotequote all
Interesting Steel front with Aluminium rear to keep the weight over the driven wheel...

http://www.youtube.com/watch?v=pDpol06U2K0


Liquid Knight

Original Poster:

15,754 posts

212 months

Friday 11th November 2011
quotequote all
So this recumbent exercise bike...

http://www.ebay.co.uk/itm/Halley-Recumbant-Bike-Co...

...has an adjustable seat by moving along what would be the centre spine of my bike.

One of the problems with the lent recumbent was the lack of adjustment. Having a telescopic boom would mean a lot more fabrication and you'd need a chain splitter and spare links in your pocket to go from my six foot two to accomadate a taller or shorter rider. However with the seat free to move up and down the centre spine of the bike it could be a lot better.

What do you guys think?

Liquid Knight

Original Poster:

15,754 posts

212 months

Saturday 12th November 2011
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So my Python idea isn't so bad after all. wink

Liquid Knight

Original Poster:

15,754 posts

212 months

Wednesday 16th November 2011
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Last time I used steel that was too thick to weld with a mig and weighed quite a bit.

2.5mm is too much how about 1.5mm or 2mm mild steel (Stainless and Aluminium are out at this stage as my M.I.G still doesn't work properly)?

anonymous-user

83 months

Wednesday 16th November 2011
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Bamboo & Hemp + Epoxy seems the way to go at the moment. What do they use in manufactured 'bents?

Liquid Knight

Original Poster:

15,754 posts

212 months

Friday 18th November 2011
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Three days off again and I'm looking for a parts donor and raw materials. smile

Liquid Knight

Original Poster:

15,754 posts

212 months

Sunday 20th November 2011
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Potential donor 1...



...Raleigh Pioneer 21spd.

Well it's purple. I rode it to the shop to make sure all the bits worked. Very simple gears, suprisingly quick but not fast enough to worry about getting a ticket. 700C x 38's so as well as the adventage of high gears I had a lot more pnumatic comfort than a road bike. Hellishly short cross bar meant I was hitting my elbows with my knees. Full lengh mud guards, steel frame and nearly new tyres. Brakes are typical for a bike of this period; next to useless but that's an easy fix. 700C means I have to add an Inch to the boom on my design so as far as fabrication goes it doesn't make a great deal of difference. wink




Woooo! Prety green mica dots over a purple/violet base. Almost a shame to take the ginder to it eh? hehe

Liquid Knight

Original Poster:

15,754 posts

212 months

Sunday 20th November 2011
quotequote all
Potential donor 2...



21 Inch Crusader moutain bike. Advertised on eBay as having 21 Inch wheels, guess that's why I won it for £10.50
21spd Shimano SIS twenty six inch wheels and a nice chunky downtube. I wasn't planning to use the original frame to make up the recumbent spine but this would make it easier. Maybe as a plan b. Still for just over a tenner I have all the bits I need. I'll get a pair of Curio tyres to replace the old knobleys.

If I use the £10.50 bike the project should come in at under £100 total. If I use the expensive Raleigh (£46) the bike should come in at under £150 and be a fair bit quicker as well. Decisions....

Liquid Knight

Original Poster:

15,754 posts

212 months

Sunday 20th November 2011
quotequote all
Okay so it will be a garden built bike but I don't want to recycle (bodge) bits of old frame together to make it so I have ordered raw materials from these guys again...

http://myworld.ebay.co.uk/10gbottles/?_trksid=p434...

...back to work tomorrow. Hopefully the box section I have ordered will arrive before my next day off so I can strip the donor bike down, make the spine and get it rolling at least by the end of my next time off.

Edited by Liquid Knight on Sunday 20th November 17:26