Delta Trike on 'yard sale' Steroids

Discussion in 'Photos & Bicycle Builds' started by papa, Sep 6, 2010.

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  1. papa

    papa Guest

    I've been saddling the blue beast (pictured below) for nearly a year now, unassisted - and this summer's yard sale finds left me with a sizable pile of electric push scooter parts. So.. I fished-out the 350 watt motor, the best pair of batteries, and hung'em on the blue beast. I must admit, with a top speed of about 28 MPH and 20 MPH up 2-3% grades, it is nearly as addicting as wet T-shirt contests.



  2. GearNut

    GearNut Active Member

    That is cool! I bet it is a blast to ride under electric power.
  3. professor

    professor Active Member

    Papa, can you elaborate on the drive? I like the layout.
  4. papa

    papa Guest


    The 350w 24v motor is from a Schwinn S350, as is the controller, throttle and initially the wiring harness - which was later revamped and cleaned-up. The gearing is 11t x 80t (i originally wanted a 90t to give it a little more low-end grunt, but didn't have one handy). I left the OEM pedal drive unmodified and intact (which drives the LH wheel only) - this allows me to qualify for 'moped' status in many states, but I also appreciate the redundancy in the event of failure of either system. I used a standard BMX freehub and simply screwed-on the scooter's freewheel adapter. One problem, since I was spinning the hub counter to the typical RH drive, I had to tack weld the freehub adapter to the hub to prevent it from unscrewing when power was applied.
  5. thats awesome. I really like how the drive systems are completely seperate. Wish i kept my old parts scooter now. Gotta love that cargo rack too :)
  6. delta trike question

    I don't recognize this delta trike. Is it homemade? A Atomic Zombie plan. It does have that non home made look though. Is just one rear wheel braked. My EZ3 sun delta only has one rear wheel brake and if going fast the brake when applied pulls violently to the right even with the front brake applied too. I don't see a brake on your front wheel. Be careful
  7. Turtle Tedd

    Turtle Tedd Member

    ..Main tube where it connects to the head tube..a lot of stress on this joint..inspect this weld carfully and often for cracks..because of the bikes overall length and the forward angle of the front forks this is the place where that frame would fail...
  8. papa

    papa Guest


    It's my creation - originally a 'granny' trike w/24" wheels. Now has 20's on the rear and 18" (355) on the front (the top image is a year old and shows a 16" (305) front. Yes, only one rear brake - but I have a set of dual discs to install later this fall (in addition to 2 other trike builds currently in progress).

    This one I built for my 86 YO father (powered by 2 28v Milwaukee cordless drill batteries):

  9. papa

    papa Guest

    Appreciate the suggestion, but it's not a concern on my builds. Weight distribution on the mono tube trike (top image) is 35f/65r. In other words, 2/3 of the GVW is on the rear axle so the head tube/top tube joint only sees about 110 pounds. The main frame member is also 1.5 x .049 4130N (chromoly) and was TIG welded with ER80S2.
  10. papa

    papa Guest

    Ooops!.. I lied to ya Tedd. I just ran the math again and the front wheel only sees 71.6 pounds... not 110 lbs that I originally guesstimated.
  11. Turtle Tedd

    Turtle Tedd Member

    a ok

    Looks like you are good to go ...I really like that one you built for your he smiles a lot
  12. fleebell

    fleebell Member

    It looks very nice. That's one of the cleanest looking setups I've seen Good job!

    Lee B