Hidden electric motor in Tour de France bicycle

Discussion in 'General Questions' started by Garp, Sep 15, 2010.

  1. Garp

    Garp Member

    This is a good story about hidden motors in racing pushbikes! I'm not surprised by the cheating, the exciting thing for me is the thought of an undetectable set up built into a bike.
    With batteries getting better and motors getting smaller, it might be possible to make something very interesting that doesn't attract attention.
    Ped-Assist would make you look like Lance Armstrong, lol.


    Here's another article.


    One more...


    Attached Files:

    Last edited: Sep 15, 2010

  2. Bobbyoutback

    Bobbyoutback Member

    Great Idea :tt1:

    Thanks for the links ..
  3. Hawaii_Ed

    Hawaii_Ed Member

    Tech is amazing!
  4. Garp

    Garp Member

    Attached Files:

    Last edited: Sep 21, 2010
  5. SimpleSimon

    SimpleSimon Active Member

    That Gruber assist electric drive has me thinking.

    Take a frame with a large oval cross-section down tube from the stem, and slide a 2 cylinder swash-plate drive direct powered propane fueled engine down in it. I've seen one of those which was (external dimensions) about 1.5 inch by 2.5 inch in cross-section, and only about 10 inches long. The machinist who built it claimed it produced approximately 1 hp.

    The major issue would be heat dispersion, but that can be addressed in several ways.

    Voila - hidden engine, and range is limited only by fuel availability. If you used an over sized top tube, with a bayonet fitting valve structure, you could carry a reasonable amount of fuel equally invisibly..
  6. Garp

    Garp Member

    That sounds intriguing! Do you have any info on the swash plate motor?
  7. SimpleSimon

    SimpleSimon Active Member

  8. Garp

    Garp Member

    Last edited: Nov 22, 2010
  9. SimpleSimon

    SimpleSimon Active Member

    That appears to be a hub motor driven e-bike, not a hidden motor. Nice looking bike.
  10. buzbikebklyn1

    buzbikebklyn1 New Member

    LOVE that Gruber motor! its so on the down low that not even a real bike mechanic couldn't tell without a very close inspection.True innovation!...I salute those guys at Gruber. The price? Fugetaboutit!... new innovative tech always costs more at first, in time the cost per unit always comes down. Look how much the price of Li-po batteries has come down.
    Only 200w? Give them a little time, i'm sure more powerful motors are in the works.
    Now... lets see, my old Trek 23"alum. 4500 frame has a 29.5" seat post tube.....
    the down tube is nice and fat... bet i could squeeze a stack of extra cells in there, or stash a nice fat 36v12 ah li-po in a tailrack bag, thats it!
  11. Garp

    Garp Member

  12. Slackbiker

    Slackbiker Member

    E-bikes are beautiful, especially this ultrasmall stuff; but either the price (in this case) and/or the range and/or the weight still don't make much sense for most people. It almost seems we'll need cheap fuel cells, maybe not too far off after the Bloom box, except that fuel cells have been "5 years away" for decades.