Recent content by izpirkt

On a side note, has anyone been able to try out one of these? http://www.ridekick.com/

I used the rear frame off of a cheap suspension bike as the connection for my pusher trailer, along with a 26" fork and a head tube. I have tried a 26 and 20 inch wheel with hub motor for the power. THere is definately some "wag" or oscillation at ~20mph. The side to side stiffness of the...

Yesterday I swapped out the 26" geared hub motor on the trailer for the 20" brushless. Today I rode to work and amazingly the sway at high speed is nearly gone. I think it has something to do with the stiffness of the wheel itself. The spokes on the 20" are only about 4" long. I think that...

So, with the nice weather this weekend, I wanted to take the bike out for a nice trail ride. With the roots and rocks, the trailer would have be impractical, and I wanted some exercise anyway. The trailer came off by removing two bolts, and detaching the throttle and CA connection. These...

It is amazingly stable when holding the green "bike" and pushing the wheel toward the "bike". The trapezoid does not fold up like I thought it would. The force from the wheel is always pushing directly toward what would be the contact patch of the rear wheel of the bike. I'll have to get...

Great idea! I have thought of some linkage joints, but have never seen this trailer hitch. Went to the Hensley website, looked at some competing hitches, and saw a Lego demonstration of the joint. I decided to make my own to try to see what would happen with a single wheel. I broke out the...

I did some welding this weekend, and attached two platforms to the sides of the trailer fork. These will support the batteries, to be bungied on top for now. Eventually they will hang underneath the platform, and it will be a shelf for carrying whatever load I need. I decided to invert the...

Just got mine running today. I have had issues with 36V controller LVC's as well since the batteries I'm using are only 33V. I finally solved it with a 24-60V controller. You are running just 12V total? Does your sprocket have a freewheel? My trailer weighs in at 38 lbs, with 30 of it on the...

I do have a couple of concerns about this setup. One is the fact that the trailer will probably behave differently with a significant load on it. The other is that at high speed when the trailer hit a bump it would fishtail a bit. When it landed it would snap back into place with a pretty good...

So, in addition to the electronics portion of this build, I have also been working on hardware. I wanted to make a very short trailer, basically just a wheel. There was a caution from Rassy about short trailers being twitchy. I welded up an ugly prototype so that I could pull it around and...

Shoulda done it like kfong said in the first place!

I think I figured it out. I had been using the BMS interface boards without the spacer that kfong sent along with them. This spacer puts force onto the PCB to make sure it stays against the contacts in the battery. The batteries would work without the spacer, sending a readable voltage. I...

That photo was supposed to be a link to a high res version. Let's try this: http://www.flickr.com/photos/59120715@N02/5489106620/

The 24-60V controller seemed like it would solve my LVC problems, so I ordered one. I set it up on the workbench, and hooked up all 4 batteries. high res link: http://www.flickr.com/photos/59120715@N02/5489106620/ I turned the throttle, and all I got was a blip at about mid twist. I tried...

Excellent. Thank you. It is hard to find some of these sites if you don't know where to look. This never came up on Google.