Welders challenge - looking for ideas

Discussion in 'General Questions' started by bamabikeguy, Jul 6, 2007.

  1. bamabikeguy

    bamabikeguy Active Member

    Workman builds a front load trike, with an industrial (slow moving) steering bar.


    A representative of AMBUS came out yesterday, ordered regular motorized bikes for him and his wife.

    AMBUS builds/buys/rehabs bikes and trikes for the disabled, and he is exploring if motors can be added to the services.

    I had seen pictures of lots of "reverse trikes", I think it was in Denmark.

    Today he called, said his Chinese missionary contacts e-mailed, are not familiar with such a bike being used/made in China for import to AMBUS.

    So, we were talking, and I mentioned the GREAT WELDING IDEAS I've seen on MB.com.

    My starting question to you clever dudes are these:

    Can't a regular 24" or 26" fork be modified/securly welded to have 2 forks, approximately 18-24" apart?

    What space would seem best between such modified forks for stability?

    I would pay for 2 proto-types, the neck and 2 forks, then add the handlebars here in Alabama, if you guys think this is do-able. :cool:

  2. mickal1025

    mickal1025 Guest

    how much weight will the bike carry? how much can the bike weigh? how fast will the bike have to be capable of going? will I remember to look this post up again?
  3. bamabikeguy

    bamabikeguy Active Member

    I'm thinking standard aluminum cruisers, 40-50 pound bikes, and if the rider is larger than 230 pounds, I would put the 33cc Tanaka on the back.

    I'd put the slower mountain gears on them, so they'd get rapid acceleration, but more climbing power than speed.
  4. ironwarlock

    ironwarlock Guest

    if this is a trike i would go with a Honda GXH50 49.3 cc 2.50 hp. if its a bike i would go with a Mitsubishi TLE-43 43cc 2.20 hp. these are quality motors that will run without any problems. (or the Tanaka 47cc race motor 2.8 hp).
  5. papa

    papa Guest

    Something like this maybe, but with a single drive wheel at the rear?

  6. bamabikeguy

    bamabikeguy Active Member

    What I'm thinking of is taking a regular cruiser bike, with basic NON suspension front forks.....(I can't use the Drawing Board feature)....

    Take 2 forks and cut them both at the neck. Take one neck, weld a 24" or maybe 30" bar at the bottom, and weld the two forks to the ends of the bar, allowing installation of two standard wheels on each side.

    Then the neck is inserted thru the yoke and the regular handlebars are re-attached.
  7. gone_fishin

    gone_fishin Guest

    steering will be difficult unless the right geometry is applied, may be impossible without variable camber built in, just guessing but it seems like something to ponder as the concept incubates.
  8. bamabikeguy

    bamabikeguy Active Member

    I thought about the steering, speed is going to have to be constrained anyway.

    Thats why I was wanting one of these welders to build me a prototype, and I'll experiment with steering on one of the Avalons gathering dust in the back of the shop.

    I'll pay them to use recycled forks for the experiment, let the welder use their judgement on the width of the thing. Just keeping in mind that I don't know if the AMBUS target is folks with arm or leg disabilties yet.
  9. papa

    papa Guest

    Sorry, I work best with images or drawings; Something like this?

  10. gone_fishin

    gone_fishin Guest

    3 headsets is exactly what i would suggest....wow, how cool! ever try skis on the front? :evil: :lol:
  11. srdavo

    srdavo Active Member

    here's a home-built pic, I borrowed. (somebody was selling plans on the net)

  12. gone_fishin

    gone_fishin Guest

    well, i guess that answers my doubt...pretty neat lil item there :)
  13. mickal1025

    mickal1025 Guest

  14. bamabikeguy

    bamabikeguy Active Member

    YES PAPA- :grin: Thats the ticket !!!!

    Who do I send the money order to???? I'd like to keep the enterprise in our MB.community if possible, seemingly have more perception of the challenges and the solutions.
  15. papa

    papa Guest

    The bike pictured is called the HammerHead, and is featured in Brad Graham's book titled "Bicycle Builder's Bonanza". Nothing complicated about the design, but will require welding on the frame of the selected bike, in addition to the fork mods - meaning, it is NOT a 'bolt-on' conversion.
  16. KanesKustoms

    KanesKustoms Member

    Ive tried this

    I have three words of advise

    Alignment Alignment Alignment
  17. Anyone notice that home built has no brakes?
    I bet the braking is in the arms.
    Toe in those wheels!
    That would be one fantastic ride down a huge hill.
  18. Alaskavan

    Alaskavan Guest

    Doesn't need brakes. It won't be going too fast with that flat back tire.