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 Cuda subframe 3

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T O P I C    R E V I E W
warren Posted - 10/05/2010 : 20:00:56
I'm working on this thing again. Hopefully it will be done and tweaked for BM 2011.

http://www.recumbents.com/wisil/barracuda/cudawsubframe3.htm

-Warren.
25   L A T E S T    R E P L I E S    (Newest First)
warren Posted - 07/06/2014 : 12:08:11
Today was a major milestone. After getting the front wheel disks done I reinstalled the new drivetrain and rode it up and down the block with the canopy off. The chain wasn't popping off of the hub cog anymore, now it was popping off of the upper chainring. I took off the upper chainring and reshaped the teeth a bit to prevent that, then back out on the road. Success at last!

I felt confident enough for higher speeds, so I rode the 'liner to a faster albeit more heavily trafficked road. I had to ride it up a largish hill to get there, which was tough with the lack of low gearing. A roadie dude passed me on the way up and astutely ignored me. After sitting at a light for a while he took off and I slowly cranked it up. About half a mile down the road I blew by him like he was standing still. I was able to get it up to high speed on the way back (slight down hill) but no speedo so I don't know how fast I was going. I'll have to take it along next time to see if the bike feels right at 36 - 40 MPH.

No chain loss, no major rubbing, and it felt pretty responsive. Better than the old Rohloff drivetrain? Dunno yet. We will see at Northbrook!

http://www.recumbents.com/wisil/barracuda/cudawsubframe3.htm

-Warren.
alevand Posted - 05/20/2014 : 03:37:48
Its all smoke and mirrors.

C:
Tony Levand
Speedbiker Posted - 05/19/2014 : 16:05:08
I love the smell of burning brake pads in the morning....
Speedbiker Posted - 05/19/2014 : 15:55:00
I love the smell of burning brake pads in the morning....
warren Posted - 05/19/2014 : 11:26:37
At the speeds I go I get some nice burning rubber smell but the rims don't get too hot.
Speedbiker Posted - 05/18/2014 : 20:58:43
Yeah...
warren Posted - 05/17/2014 : 17:50:58
5 working speeds. Rubber melter - you are referring to the rim brake?
Speedbiker Posted - 05/16/2014 : 17:16:15
Pretty sweet. How many working gears? Even has a universal rubber melter screwed to the fork crown!
warren Posted - 05/15/2014 : 11:06:46
I finished the brakes and handlebars, worked the bugs out of the shifting, and finished the secondary chain idler, so it's getting close to done.

Took the drivetrain apart and brazed all the joints that were tack-brazed previously, then sprayed a coat of gloss black onto the frame. It's amazing how much better it looks with a coat of paint (not that anyone will ever see it once it is hidden inside the Cuda-W fairing).
I re-assembled the drivetrain and am pretty close to installing it back in the 'liner for an actual test ride. The chain wants to skip off of the inside of the cog on the wheel hub under adverse conditions.



I ran out of time before the Michigan races, so I put the old drivetrain back in the 'liner and will race it that way.

-Warren.

warren Posted - 04/05/2014 : 17:55:16
Nice days are coming more often now, it must be spring! I had a productive day and had time to rebuilt the derailleur hanger. After trying the drivetrain out in the bike I found that the V1 hanger was shaped badly where my knee moves. It shifts nice. This one goes up high enough to prevent that. Now I'm ready to install the new derailleur pulleys and wash the grease out of the lefty hub to see if can make spin better.

-Warren.
Speedy Posted - 03/27/2014 : 08:33:53
some chatter about bearings ....

http://velonews.competitor.com/2014/03/bikes-and-tech/technical-faq/technical-faq-much-drag-can-eliminate-dropping-two-bearings_321169
warren Posted - 03/26/2014 : 15:19:09
Thanks Garrie, I'll pick up some WD40 and wash that stuff out.
Garrie L Hill Posted - 03/25/2014 : 18:08:42
Warren;
WD-40 cuts grease well without totally degreasing.

Garrie "carbon based lifeform" Hill
HPRA Co-Dictator of the East
for pics of some of my time and money sucking projects
http://garriehill.winkflash.com/
and
http://s58.photobucket.com/albums/g277/cfbb/
and videos
http://vimeo.com/5513519


warren Posted - 03/25/2014 : 16:43:24
I finished the left side idler, spun up the drivetrin and shifted the gears. It works! It does seems like the whole drivetrain isn't spinning as freely as I would like though. Much of the resistance seemed to be the Profile hub. I took it apart. It has 4 cartridge bearings(!), with plastic shields. I removed the shields and noted that the bearings are packed with grease. Probably I should remove that grease but just removing the plastic shields helped a lot. What kind of solvent removes grease? Something else I noticed was that the idlers on the derailleur don't have bearings. I need to find some replacement derailleur idlers with bearings...

I just bought 'Tacx Ball Bearing Shimano 9/10 Derailleur Pulley Set Shim 9/10' by Tacx from Amazon. Hopefully those will fit the Neos. I needed a set to replace the cracked one in the Shimano XT Derailleur on my Nocom too.
Speedbiker Posted - 03/16/2014 : 22:08:33
Looks great!
warren Posted - 03/16/2014 : 17:33:37
I ended up just using washers to space the chainring properly, and the chainline has clearance in all 5 gears. A couple days of above freezing temperatures allowed me to finish the derailleur hanger, and it is shifting great, except for the high gear which is most outboard. I will need to tweak the derailleur cage a bit to allow the chain to get onto the bottom idler without skipping to fix that. I installed the 13T cog on the Profile left drive cassette and the chainline on the left looks good. I just need to install an idler and some chain keepers to make the drivetrain bulletproof.



Tony - I downloaded that watermark app and research indicated that it is legit (though the free version is somewhat lobotomized).

It was too cold in the garage to do much more than take a picture today...

-Warren.
alevand Posted - 03/16/2014 : 09:32:26
This looks too good to be true, it probably puts it's own mark on it as well.

http://freewatermarksoftware.com/

C:
Tony Levand
warren Posted - 03/16/2014 : 07:17:25
I think that picture was of the first aborted derailleur drivetrain. Yes, I have looked for a watermarking app have not found a decent free one. I'll get a picture soon. I think all the drivetrain clears my body bits but I want to make sure before I get too far.

-Warren.
alevand Posted - 03/16/2014 : 05:52:06
Hi Warren, Could the head tube be made steeper to move the cluster out away from the knees? It might also allow slightly more steering.


ps: you should have a water mark on your pictures, as they are found all over the web.

C:
Tony Levand
warren Posted - 03/15/2014 : 12:16:41
I made good progress today. I finished tweaking the derailleure bracket and installed the chains. It works! Next steps are install the left side chain management and then stick it back in the bike to make sure my knees still clear the mid-drive parts. There is still lots of work to do before it makes its maiden journey but this is the first time I have gotten this far with a super-narrow derailleure based drivetrain without deciding that it was junk.


-Warren.

Speedbiker Posted - 01/31/2014 : 17:38:58
Get it working, we have some big tracks to race on this summer.
warren Posted - 01/31/2014 : 13:27:50
Here's what I've got so far:


I built a bracket to clamp the crossover bearings, and after many fits and starts and keepers and making of small pieces of metal out of large ones, it's tacked in place in the right place and is straight.
No 39T chainring to be found in the box-o-chainrings, but I found a 36T chainring and see now I need different spider bolt spacers to prevent the chain from catching on the crank arm.

It's supposed to be unfit for man or beast in the out-of-doors tomorrow, so hopefully I'll be able to get out into the garage to make some spiffy spider spacers and the derailleur hanger.

-Warren.
warren Posted - 01/04/2014 : 15:30:39
My heel clears the front axle by an inch or two.
alevand Posted - 01/04/2014 : 14:43:01
Warren, How far is your foot from the front axle?

C:
Tony Levand
Dreamer Posted - 01/04/2014 : 13:24:08
quote:
Usually the freewheel sprockets are not interchangeable between manufacturers.

I also have an assortment of 5, 6, & 7 speed threaded hubs. Even the 5 speeds have 3 different sizes of sprockets on each hub which further limits the combinations of possible gear ratios.

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