Next, scratch that. THIS years bike

[Farfle]

Hopefully should be rideable by then, but yeah if you shot me a message beforehand I can drag it down.

[Farfle]

IT LIIIIIVES!



Edit: Oops, meant this picture:

[izeman]

we want to see some moving action !!!

[fizzit]

Hey farfle, I PM'd you!

[Farfle]

A quick walk around of the bike:

[Farfle]

hehehe, first speed run on camera:

http://youtu.be/fQEFk64mTto

[johnrobholmes]

YeeHaww!

[fizzit]

That looks crazy fast! I wish I could have ridden it while I was there. BTW, thanks for showing me your bike and giving me that hall sensor while I was at your store. I love staying at Bend, you guys have a really great town and mt bachelor is awesome!

[Farfle]

AAH! JRH! If you are still reading this, cancel my last order of spokes, i'm going to have to trade to a 20 inch wheel, so ill need different spokes, I left a comment in the order form.

[Farfle]

So, the first wheel lace was attempted as a "luke" style lace, using some nice 14 awg ss spokes, and tensioned the heck out of it. Thinking that the little stretchy spokes all share the load evenly, and that if I break one spoke I have to break all of them . Well... They are all broken, well half of them are broken, the rest were just mangled.... Catastrophic horsepower induced wheel failure. It happened when I flogged it out of the parking lot at work, pulled a little wheelie and BAM wubwubwub crunch thankfully I was only going 5mph when the rear end hit the ground. Bike is fine, the motor diameter is a large enough diameter that the chainring didn't hit the ground. Waiting on rebuilding the wheel into a 20" rim with some 54mm 12awg spokes from JRH. Ill take some pics for you guys.

[John in CR]

My daily rider cargo bike has started snapping it's short 9ga spokes. After over 3 years I'm sure it's mostly cause by neglect. I only bring it up because you're running a whole lot more torque, and if 14ga had such a short life how can 12ga be enough better to consider it reliable? I don't think Luke's is a valid comparison, since his far smaller diameter hub makes his spokes able to act a lot more like springs than our short spokes.

[Farfle]

Im hoping the 20" rim solves it. if it doesnt, then ill probably press an aluminum ring onto the outside of the motor and weld the damn rim to it.

[John in CR]

Im hoping the 20" rim solves it. if it doesnt, then ill probably press an aluminum ring onto the outside of the motor and weld the damn rim to it.

With your skills and tools you should just go straight to spokeless. I did something similar to create a wheel for a scooter hubbie for which rims were non-existent here. That wheel is still going strong 4 years later.

[Farfle]

Ok, heres some pics of the bike in it's current state, there's not a whole lot left to describe, the frame is out for powder coating, and the wheel is laced up. Thank you JRH for the quick delivery!

[zombiess]

Hold on tight, that thing is going to be a acceleration monster now.

[auraslip]

Looks great.

[Thud]

hehe,
That thing just makes me smile.
looks so totaly Mad Max you have to love it!

[liveforphysics]

This is getting really cool Farfel! Woot!

[nicobie]

I can't wait to see this thing on the track

[johnrobholmes]

Glad the spokes worked for you! Give em hell!

[etard]

Nice work man! Is it even possible for the rear wheel to get out of true with such short spokes?

You better be riding this at Grange, unless of course you bring a cute jockey that will beat Luke!

[deVries]

Ok, heres some pics of the bike in it's current state, there's not a whole lot left to describe, the frame is out for powder coating, and the wheel is laced up.

How did it perform on the race track or w/further testing? Is the frame & geometry just what you expected in performance riding/racing? Anything you would change?

I guess you don't have time to build similar frames or these dual-pies for sale?

Can you post-up some more video. This time don't try to record the CA screen while going top speeds... just show us the road view front/rear like Luke did in this last race or like Greg does rocketing around DC.

Awesome project & beautiful work too!

[Farfle]

Ok, heres some pics of the bike in it's current state, there's not a whole lot left to describe, the frame is out for powder coating, and the wheel is laced up.

How did it perform on the race track or w/further testing? Is the frame & geometry just what you expected in performance riding/racing? Anything you would change?

I guess you don't have time to build similar frames or these dual-pies for sale?

Can you post-up some more video. This time don't try to record the CA screen while going top speeds... just show us the road view front/rear like Luke did in this last race or like Greg does rocketing around DC.

Awesome project & beautiful work too!

The bike performed great on the track, the rider not so much, I build bikes a heck of alot better than i ride them . IMHO, the swingarm is a bit too flexy, both laterally and torsionally, so im going to be making a new one that resembles the zero swingarm, as its a pretty elegant solution:


the frame handled VERY well, the brakes were excellent, if anybody id doing a performance ebike build, they need moped brakes. even the tiny moped brakes kick the crap out of the biggest baddest bike brakes. That being said, hucking 320 pounds of un-smooth "full throttle out of the corner followed by slam on the brakes before you get to the next corner" riding around the track was not gentle on them, and I DNF'd in the second heat race because I Warped the front brake rotor so badly that it was rattling and bucking the caliper. Anywho, we brought a go-pro mounted to the bars, but its battery died right before we started the final race, so I have heat one and the DNF heat two recorded.

[deVries]

Anywho, we brought a go-pro mounted to the bars, but its battery died right before we started the final race, so I have heat one and the DNF heat two recorded.

Thanks! for the update. Have you got a link for your video yet? Post it here too when you've done the upload. I saw the pics you posted but have missed your race video so far.

Anyway, great job Farfle & thanks for sharing your race experience too! i.e. the brakes, sa, etc.

[Farfle]

After breaking 2 normal kickstands, and one expensive one, I have finally been forced to make my own. But while I was gathering parts for the kickstand, I saw these: http://www.harborfreight.com/6-3-4-quar ... 98506.html at harbor freight, and got two. With one cheap 5v cell-phone charger to use as a DC-DC converter, heres the end result .