www.recumbents.com - High Racer
www.recumbents.com
www.recumbents.com
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
 All Forums
 www.recumbents.com
 Technical / Bike Building
 High Racer
 New Topic  Reply to Topic
 Printer Friendly
Previous Page | Next Page
Author Previous Topic Topic Next Topic
Page: of 3

warren
human power expert

USA
6401 Posts

Posted - 01/23/2018 :  20:34:36  Show Profile  Visit warren's Homepage  Reply with Quote
Looks nice! On your drawing I just noticed that your head will be behind the rear axle which will make it hard to balance. That's one of the problems with stick bikes.
Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 01/23/2018 :  21:26:49  Show Profile  Reply with Quote
Shoulders, yes. I think my head will be just in front of the axle. Much the same as the Actionbent I got from Jerry...

Go to Top of Page

Jerry
human power supergeek

USA
1377 Posts

Posted - 01/24/2018 :  07:43:47  Show Profile  Reply with Quote
Looking good! I never had a problem with balance on the Actionbent. I think the F5 will be even more stable. After you get use to the bike, lower that seat down to 20 degrees or lower!
Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 02/16/2018 :  11:42:14  Show Profile  Reply with Quote
Had a frustrating week, so I bashed on some metal and made the lower seat bracket. It's not perfect, and a bit higher than I had hoped. But, it's done, and has 2 QR's to release the seat completely.

Now to cable it up and get it ready for a test ride.



Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 02/24/2018 :  22:01:18  Show Profile  Reply with Quote
Just about ready for a ride. Still need to cut and cap the cable ends. Should get that done tomorrow. Maybe go for a ride, if the weather cooperates.

Go to Top of Page

Speedbiker
human power expert

USA
3835 Posts

Posted - 02/25/2018 :  05:08:15  Show Profile  Reply with Quote
Sweet rig. Perfect for the Black Bear 100.
Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 03/03/2018 :  10:35:22  Show Profile  Reply with Quote
Weighed it today. A little disappointed that it came out at 31.2lb. I thought this would be much lighter than my homebuilt LWB (@32.7lb). But, only a pound and a half.

According to Google, the advertised weight was ~26lbs. That was with the Rans seat, not a hardshell like this. And, of course, without pedals. But, they don't weigh 5lbs.

I would guess that my seat brace is lighter than Rans'. My handlebar setup should be close to a wash. I guess these wheels aren't so light, but they're not especially heavy either. Front (steel) fork is a bit portly, though. Might need to find a carbon replacement for it...
Go to Top of Page

Speedbiker
human power expert

USA
3835 Posts

Posted - 03/03/2018 :  12:14:55  Show Profile  Reply with Quote
That stuff adds up. Plus, advertised weight might not have been sport on.
Go to Top of Page

Jerry
human power supergeek

USA
1377 Posts

Posted - 03/03/2018 :  14:00:00  Show Profile  Reply with Quote
I would bet the real weight would be closer to 29-30 pounds rather than the advertised weight. Someone in TX weighed his F5 and it was 29.8 pounds. I think the companies weigh them with no cables, pedals, tires, and tubes! My trike weighs over 5 pounds more than advertised. It is a lot easier to lose 5 pounds off ones self than the bike! It still is a nice looking bike.
Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 03/19/2018 :  09:53:11  Show Profile  Reply with Quote
Maiden flight was yesterday. It wants to roll, that's for sure. Very easy to get going. I rode without my cleats just to be safe. But, I think the next ride I'll try the cleats.

Did find one problem - I laced my wheels wrong. I didn't interlace the spokes on the 3rd cross. The wheels (especially the rear) have very little lateral stability. Going to take them all apart and relace them this week...

Seems my LWB is in the same boat. Not sure how I missed that step. Oh well, live and learn.
Go to Top of Page

Rat Rider
Starting Member

USA
10 Posts

Posted - 04/27/2018 :  14:01:29  Show Profile  Reply with Quote
I am late, as usual, to the party, but this design reminds me of the Z-bone. A racey bike for sure. Even my fat-a$$ did a 4 hour century on one. Of course drafting off JS, JV, and others might have helped.


quote:
Originally posted by ShelGame

How about this?



Inspriation was this:



Which I beleive I read was your work, Thom? Don't know if it was fast, but it looks fast.

Mine is a similar layout, but not FWD...



Too many bents
Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 12/18/2018 :  10:30:18  Show Profile  Reply with Quote
Reviving this old thread.

I re-sketched the 'Z-Bone' style frame above to lower the seat, and increase the seat-to-pedal distance to match what I have on my LWB bike now (with the big front wheel and fork). Going to start collecting steel to build this one up. I want to do a more robust jig, too; since this frame won't be so easy to jig up as a flat layout. Maybe some 8020 extrusion is in order...

Go to Top of Page

warren
human power expert

USA
6401 Posts

Posted - 12/18/2018 :  18:25:43  Show Profile  Visit warren's Homepage  Reply with Quote
That should be a fast one!
Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 12/26/2018 :  10:00:09  Show Profile  Reply with Quote
Placed a steel order with Aircraft Spruce this morning. When I get my fantasy football winnings, I'll start buying proper jig supplies...
Go to Top of Page

Larry Lem
human power expert

South Sandwich Islands
2535 Posts

Posted - 12/26/2018 :  12:59:00  Show Profile  Reply with Quote
Don't you just love bikes where you can only see where you're headed when you're turning? (I have a couple) hahaha

Larry Lem

Edited by - Larry Lem on 12/28/2018 13:44:36
Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 12/29/2018 :  12:13:07  Show Profile  Reply with Quote
Got the metal and fork in the mail today. I pulled out the 80/20 bits I already had from an old car project (con rod balance) to re-purpose into jig parts. Still need to order the main jig beam; but the seller is on vacation, so I guess I'll get that on the way on Wed.

Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 12/29/2018 :  12:59:00  Show Profile  Reply with Quote
Updated the drawing a little bit, too. Starting to plan the jig layout...

Go to Top of Page

Jerry
human power supergeek

USA
1377 Posts

Posted - 12/30/2018 :  10:51:35  Show Profile  Reply with Quote
Looking good. Are you going to add some foam underneath like John has done to his bike?

/img]
Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 12/30/2018 :  12:16:00  Show Profile  Reply with Quote
quote:
Originally posted by Jerry

Looking good. Are you going to add some foam underneath like John has done to his bike?

/img]



For sure, foam or coroplast..
Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 12/30/2018 :  12:37:13  Show Profile  Reply with Quote
Just ordered the 'spine' for the jig. 60" of 80/20 aluminum extrusion 1.5 x 4.5". Still need (at least) some 'cones' to fix the HT and BB in place.
Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 01/02/2019 :  14:09:59  Show Profile  Reply with Quote
FWIW, I ordered these to use as cone spacers to center the HT and BB:

https://www.ebay.com/itm/371169144353

Way cheaper than lathe centers or motorcycle jig parts...
Go to Top of Page

SpiderMonkey
recumbent enthusiast

USA
452 Posts

Posted - 01/02/2019 :  14:51:04  Show Profile  Reply with Quote
Interesting option. I wasn't clever enough to think of that. I ordered some wooden balls and drilled them on center (hole saw in a piece of stock to give a centered spot for it to sit, then drilled 5/16 or 3/8 for home-depot threaded rod).

They seem pretty centered, but it turns out for my jig I won't need them. I figure I'll use them for pressing headset races, at least that first little bit which is tough for me to center.

--SpiderMonkey
Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 01/07/2019 :  18:40:05  Show Profile  Reply with Quote
Main portion of the jig is coming together. Now for the long grueling part - waiting for the rest of the jig bits to come in the mail...

Go to Top of Page

SpiderMonkey
recumbent enthusiast

USA
452 Posts

Posted - 01/08/2019 :  06:48:54  Show Profile  Reply with Quote
That's an interesting way to do the middle support with the jig. I made little adjustable doo-dads instead, and though they're highly adjustable, the problem is they're highly adjustable (and therefore require rechecking all the time to make sure things stay square). (One of them, of course, is out of square so I need to take it apart and fix it as well.)

I think your MDF panel center is a better option. I may have to make one of those. Now that I think about it, the current bike and next 2 planned will differ only in axle-to-main tube height by about 45mm, or exactly one of my extrusions, so an MDF like that could just be put top a 2-stack of extrusions for the next go-around.

Now, if I can find a partial sheet of MDF nearby. Last time I looked, the big boxes only had full sheets, and they weigh 110 lbs!

--SpiderMonkey
Go to Top of Page

ShelGame
recumbent enthusiast

USA
351 Posts

Posted - 01/08/2019 :  08:02:49  Show Profile  Reply with Quote
In between the panels is 2x2 square furniture grade poplar (actually 1-1/2" squaure). My seat tube is also 1-1/2" OD so it works out well. The aero downtube is 1.43" at it's widest, so I'll need some ~0.03" cardboard on each side to center it and clamp it in place.

The MDF I used is ~ 1/2" thick. It was leftover platform panels from an old kids bed.
Go to Top of Page
Page: of 3 Previous Topic Topic Next Topic  
Previous Page | Next Page
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
www.recumbents.com © 2017 www.recumbents.com Go To Top Of Page
Snitz Forums 2000