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alevand
human power expert

USA
3541 Posts

Posted - 02/19/2019 :  20:58:07  Show Profile  Visit alevand's Homepage  Reply with Quote
I use to do that with nylon line, but over then under, so they cross in the center.. You can also weave in some parallel to the seat tube to tie them together.
https://www.crazyguyonabike.com/pics/docs/00/00/84/27/large/BB?v=0

The nylon makes a comfortable seat, maybe some power lost in stretching, but rides smooth. The strings would eventually wear and brake would need to be tied together.


quote:
Originally posted by Speedy

1/8" paracord rope wrapped over the entire length of the frame is a new seat fabric trick that I've recently applied to a stationary exercise machine.
Tie the cord to one end to the frame and then wrap, round and round, all the way to the other end with no gaps between the cords.
Seems simple but it took me three tries to understand how to get the tension.
As you go pull each wrap as tight as possible. Compact the cords so there are no gaps between each wrap.
My seat required more the 500 foot of cord.
Comfort wise ... By far the best stretched fabric seat yet.




C:
Tony Levand

Edited by - alevand on 02/20/2019 06:34:13
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alevand
human power expert

USA
3541 Posts

Posted - 02/20/2019 :  06:15:22  Show Profile  Visit alevand's Homepage  Reply with Quote
I ordered a set of Schwalbe studded tires, 700x30c on sale for cheap from Chain Reaction Cycles. They probably wont be good for rutted ice, but fine for shallow snow over frozen puddles on the bike trail. I'll make up a wheel set.

https://www.chainreactioncycles.com/us/en/schwalbe-winter-spike-road-tyre-k-guard/rp-prod118113?utm_source=CRM&utm_medium=email&utm_campaign=OrderDispatch&utm_content=US



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Tony Levand

Edited by - alevand on 02/20/2019 06:24:21
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alevand
human power expert

USA
3541 Posts

Posted - 02/22/2019 :  07:20:40  Show Profile  Visit alevand's Homepage  Reply with Quote
I added a rear coro skirt to keep all the muck off the chain and brakes. 24 to 30 is a big jump, 36-30-24-21-19-17-16-15-14-12. I ordered a 26, may change 12 to 11, as it runs out at 25 with 52 front. 10 speeds with a 9 speed chain. I added two duct tape strips to seat to test lumbar support.

C:
Tony Levand

Edited by - alevand on 02/22/2019 07:24:05
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alevand
human power expert

USA
3541 Posts

Posted - 02/23/2019 :  07:09:09  Show Profile  Visit alevand's Homepage  Reply with Quote
I put the longer v-brake on the rear and shorter on the front, added pink kool stop pads to the front. Worked on chain side inner fender. Test rode on trail, shady spots still icy. Front tire is throwing water making a wet seat bottom. Chain cam off front three times, too close to crank arm. Received new rear derailleur.

C:
Tony Levand

Edited by - alevand on 02/23/2019 07:48:04
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alevand
human power expert

USA
3541 Posts

Posted - 02/24/2019 :  08:02:04  Show Profile  Visit alevand's Homepage  Reply with Quote
Yesterday I tried putting the alloy crank arm on, but the 26t is too close to the frame for a front derailleur. I need to reduce the spacing between chain rings. 42 rear cog is available on ebay, if I could adapt it. I figure they can be as close as the rear cassettes, chain rings are much thicker, though. I'll put the steel one back on for now.

... Put on new chain and rear deraillier, adjusted dropout.

C:
Tony Levand

Edited by - alevand on 02/24/2019 14:08:12
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alevand
human power expert

USA
3541 Posts

Posted - 02/25/2019 :  19:48:00  Show Profile  Visit alevand's Homepage  Reply with Quote
I ordered a 10 pack of coroplast to be pickup at home depot. About twice what I payed at the plastic supplier, but I dont have to make up a company name. Wired brushed some of the rusty spots on the frame and sprayed with clear enamel.

C:
Tony Levand

Edited by - alevand on 02/25/2019 19:50:26
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alevand
human power expert

USA
3541 Posts

Posted - 02/28/2019 :  07:26:16  Show Profile  Visit alevand's Homepage  Reply with Quote
Homepot would get the coroplast on march 13, so I canceled it. The new longer rear v-brakes are squeaking over bumps. Apparently there is too much flex in the rear triangle. It rides smooth, but deflects an inch when I sit in it. It needs some redoing. Still haven't figured out a front derailleur. I may weld an extension to the plates to keep the mech above the tube.

... I was able to remedy the squeaking brake by welding in a small brace in the triangle.

C:
Tony Levand

Edited by - alevand on 02/28/2019 09:08:06
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alevand
human power expert

USA
3541 Posts

Posted - 03/02/2019 :  15:19:15  Show Profile  Visit alevand's Homepage  Reply with Quote
Frame cracked at a miter joint after speeding over some big off road bumps. Welded the crack up and added a brace.

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Tony Levand
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alevand
human power expert

USA
3541 Posts

Posted - 03/03/2019 :  07:09:10  Show Profile  Visit alevand's Homepage  Reply with Quote
I wonder if I reverse the chainrings, I can get a derailleur to work. That would put the large sprocket next to the frame, so the cage doesn't have reach down where there is no room, next to the frame. Test ride yesterday, the frame seems stiffer.

C:
Tony Levand
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SpiderMonkey
recumbent guru

USA
569 Posts

Posted - 03/03/2019 :  10:01:16  Show Profile  Reply with Quote
I would be interested in knowing if that worked. Modern front DRs have their ramps stamped in, as far as I can tell, to be able to properly push the chain up and right. In the old days everything was just flat metal and brute force, IIRC.

I have always solved derailleur / inner ring too close problems by using a longer spindle BB to push things out, or sometimes just a 2mm spacer on drive side, depending on the type of BB and crank. On my wife's NoCom, back in the day, the only way I could get a wide enough BB to make a triple work on the nose was to buy a downhill BB. (I bought 2, always have a spare.) So I guess she can really crank on that.

--SpiderMonkey
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alevand
human power expert

USA
3541 Posts

Posted - 03/03/2019 :  11:25:17  Show Profile  Visit alevand's Homepage  Reply with Quote
Yes, but the whole idea for the custom narrowed BB is to have low Q. If I move any further right the left crank arm hits the 3 inch tube, and this tube still would interfere with the mech. I just didn't have everything thought out when I put the BB bracket beneath the tube.

C:
Tony Levand

Edited by - alevand on 03/03/2019 11:27:02
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alevand
human power expert

USA
3541 Posts

Posted - 03/03/2019 :  19:51:13  Show Profile  Visit alevand's Homepage  Reply with Quote
I ground and filed the inboard mounting tabs, I took .090 off. The granny gear mounting, I ground on a flat spot on the concrete floor. I Drilled and tapped the pedal threads and cut and ground the arm end, 148 mm. The square taper boss has been ground down and the taper filed larger. 53-39-26, 130 bcd.

http://i64.tinypic.com/14vs1sm.jpg

To reverse the chain rings, an old type two piece crank arm is needed, not sure if this would help the derailleur. Im going to try this first.

C:
Tony Levand

Edited by - alevand on 03/03/2019 20:00:24
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alevand
human power expert

USA
3541 Posts

Posted - 03/04/2019 :  15:29:40  Show Profile  Visit alevand's Homepage  Reply with Quote
Well, now I know why chain rings are so far apart, if they are too close it shifts from small to large, skipping the middle.

C:
Tony Levand

Edited by - alevand on 03/04/2019 18:13:35
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alevand
human power expert

USA
3541 Posts

Posted - 03/05/2019 :  12:24:19  Show Profile  Visit alevand's Homepage  Reply with Quote
Unsatisfied with what I made yesterday, I put the 110 bcd crank arm on in which only the granny gear mounting has been narrowed. I ground the heads of the chain wheel nuts and peened the frame for chain clearance. It upshifts by hand to the middle ring, though there's no room for the derailleur. I cut, drilled and tapped a left crank arm to 148 mm to replace the steel one. Still don't know how Im going to get a derailleur working.

C:
Tony Levand

Edited by - alevand on 03/05/2019 12:25:44
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alevand
human power expert

USA
3541 Posts

Posted - 03/06/2019 :  07:16:05  Show Profile  Visit alevand's Homepage  Reply with Quote
Im punting about getting a normal derailleur to work. I think I'll mount a front derailleur underneath and backpedal to shift. Not ideal when suddenly faced with a steep hill, but better than stopping and walking up. My other option would be to mount a stick with sliding pivot (snake stick), which would take some finesse to pick the chain. The 26 seemed a little small, 3 mph, now 28-39-53. At 3 mph can climb a 10% grade with 112 watts. I can't balance slower than 3 mph.


C:
Tony Levand

Edited by - alevand on 03/06/2019 07:25:20
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Jerry
human power supergeek

USA
1475 Posts

Posted - 03/06/2019 :  12:41:55  Show Profile  Reply with Quote
Balancing at low speeds is one reason I love trikes, I don't have to worry about my balance. Another reason is because they are so much fun. And they can be made to be fast with a fairing. And I do like to carry a lot of stuff when touring. I hope you get the Carp the way you want it soon. After the 16th I will be ready for a 4-5 day tour.
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alevand
human power expert

USA
3541 Posts

Posted - 03/06/2019 :  14:30:51  Show Profile  Visit alevand's Homepage  Reply with Quote
OK. I knew you were going to say that. Id rather tour in the Carp than the trike. I started to get ready to cut the front off the Carp and redo the frame, then I decided not to. Im starting another build instead. Just do me one favor, Jerry, when you test ride your trike, don't go all out bonkers if its cold out, Otherwise you wont be ready after the 16th. Im thinking retractable outrigger landing gears would solve the 3mph minimum, and make easier and safer egress. I climbed some steep hills in Tn on the SWB.

C:
Tony Levand
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Jerry
human power supergeek

USA
1475 Posts

Posted - 03/06/2019 :  15:15:16  Show Profile  Reply with Quote
I am headed out in the old corovelo to babysit the grandkids. It has the hood on it now so the cold air doesn't affect me. But I'll take it easy unless I see some roadies! Good luck with the new build.
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alevand
human power expert

USA
3541 Posts

Posted - 03/07/2019 :  07:09:40  Show Profile  Visit alevand's Homepage  Reply with Quote
Rear brake was squeaking again yesterday. I'll try a different brake, shorter.

C:
Tony Levand
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alevand
human power expert

USA
3541 Posts

Posted - 03/07/2019 :  13:15:05  Show Profile  Visit alevand's Homepage  Reply with Quote
I change the rear brake today. I ordered and picked up today 5 pieces of white and 5 pieces of Yellow Coroplast from Cope plastics. About $11 each.



C:
Tony Levand

Edited by - alevand on 03/07/2019 13:31:06
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alevand
human power expert

USA
3541 Posts

Posted - 03/08/2019 :  15:39:20  Show Profile  Visit alevand's Homepage  Reply with Quote
Well the Carp's VPS failed the atest going down this crazy switch back in Bolingbrook, I didn't think there would be a need for full braking and full steering simultaneously, but here it is. It would not go down this without toggling. The only thing I can do is to move the fork pivots inboard as far as possible, it should reduce the offset by 50%.

https://www.google.com/maps/@41.7099746,-88.0969107,3a,75y,91.17h,73.61t/data=!3m7!1e1!3m5!1sAF1QipPq4E_TTEuPNd3rKf2IbNgPgtAMaIGFEitskNdn!2e10!3e11!7i5376!8i2688!5m1!1e3

C:
Tony Levand
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alevand
human power expert

USA
3541 Posts

Posted - 03/13/2019 :  07:39:46  Show Profile  Visit alevand's Homepage  Reply with Quote
I made a tail box. The coroplast is softer then the fluted polypro.

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Tony Levand
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Tom Schneider
recumbent enthusiast

132 Posts

Posted - 03/13/2019 :  08:47:59  Show Profile  Reply with Quote
Tony,
How do you do a VPS on a bike or delta trike?
Thanks,
Tom

Edited by - Tom Schneider on 03/13/2019 15:15:35
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alevand
human power expert

USA
3541 Posts

Posted - 03/13/2019 :  13:31:55  Show Profile  Visit alevand's Homepage  Reply with Quote
You mean a tadpole or delta? I use linkages for the v pivot.

C:
Tony Levand
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SpiderMonkey
recumbent guru

USA
569 Posts

Posted - 03/13/2019 :  15:59:01  Show Profile  Reply with Quote
I don't know if I could do that switchback with any of my bikes without putting one foot down, or two.

Not far from our old place in Palos! Or my other old place in Plainfield.

--SpiderMonkey

Edited by - SpiderMonkey on 03/13/2019 16:01:25
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