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  1. I

    Pusher trailer build

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

    Pusher-Trailer: A Bicycle-Frame Solution

    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...
  3. I

    Pusher trailer build

    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...
  4. I

    Pusher trailer build

    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...
  5. I

    Pusher trailer build

    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...
  6. I

    Pusher trailer build

    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...
  7. I

    Pusher trailer build

    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...
  8. I

    trike pusher trailer - ideas

    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...
  9. I

    Pusher trailer build

    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...
  10. I

    Pusher trailer build

    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...
  11. I

    Pusher trailer build

    Shoulda done it like kfong said in the first place!
  12. I

    Pusher trailer build

    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...
  13. I

    Pusher trailer build

    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/
  14. I

    Pusher trailer build

    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...
  15. I

    Pusher trailer build

    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.
  16. I

    Pusher trailer build

    I quick probe with the dremel tells me that removing the potting is not going to be possible. It is about an inch thick of metal-hard epoxy. I don't know anything about controllers. If I google "36V brushed controller", I get some chinese options...
  17. I

    Pusher trailer build

    I ordered a brushless motor and controller from Cycle9. They came in last week. It came with a 25A infineon controller that has a direct connection to a Cycle Analyst. I thought that the cycle analyst could change the LVC of the controller, but even if I set the CA to a 25V cutoff, when I...
  18. I

    Pusher trailer build

    I still haven't figured out the LVC issue with the controller. I did finally get 4 batteries in parallel, and it will run longer, but with any real torque on the wheel, the controller will trip. Any ideas on how to change the cutoff, or are there brushed controllers out there without one?
  19. I

    Pusher trailer build

    I soldered up one of the boards from kfong, and went to test out all of the parts I got from ebay. The components are off of an old ebike called a "callisto" There is a 36V controller (brushed) and throttle. I can't find any information about it, and all of the parts are potted. It has a 31V...
  20. I

    Pusher trailer build

    Thanks for the pictures guys. The 1893 picture looks like a steam powered friction drive. Betcha that was loud. bctriker,that looks like a lot of fun! Was the e-BOB purchased, or built by you? The yoke on the front of the trailer seems to be built for a larger wheel, does this affect...
  21. I

    Pusher trailer build

    I also scavenged some dead bikes around campus to use for parts: I'll get some images up soon of what I am planning to do with this mess of parts in my garage.
  22. I

    Pusher trailer build

    Rassy, Thank you for that input. I'll be looking out for that "twichiness". The intention of my first build is to test the dynamics of the trailer. I expect to have to go through several rounds of re-building. I wonder if a collapsible trailer is possible. Extend to a long wheelbase while in...
  23. I

    Re: Ebike Kit, Batteries And Trailer

    I'm not sure how much trouble it would be to mount the batteries, but as far as the electrical connection for use, it is simple and straightforward. Simply split the lead to the controller from the batteries and have two parallel "input's" to the controller. Then you can hook up one or both...
  24. I

    Pusher trailer build

    I'm finally getting started documenting my electric pusher trailer build. I'm doing this for a thesis project for a design degree. I want to promote the vast amount of information and expertise that are on DIY forums like this one. Since this is for a design project, I am not just building...
  25. I

    Re: Ebike Kit, Batteries And Trailer

    A 50% reduction in the Ah capacity of a bank of batteries probably means more than a 50% reduction in range. From what I have gathered from this forum, the benefit of multiple batteries in parallel is that this not only increases the energy stored, but also the discharge capability. One of my...
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