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  • Electric Trike with bmx front end.

    If you check out my CrazyBIke2 thread over on Endless Sphere, you'll see where I used a couple of different kinds of those to power it that way, with varying results (lots of destroyed bike parts from the torque!). If the frame hadn't been so flexy at the time, I would probably not have had those problems and would've stayed with those motors. I still have them in the shed. The frame is a lot stiffer now after several generations of mods, and would probably work fine if I ever had to try it...but it uses two hubmotors now, and gets 0-20MPH acceleration of about 4 seconds, quick enough to avoid being run over from behind by cars at traffic lights when I get stuck as first in line, even with a bunch of heavy cargo on it. For the SB Cruiser Trike, the two rear hubmotors are fine right ...see more »If you check out my CrazyBIke2 thread over on Endless Sphere, you'll see where I used a couple of different kinds of those to power it that way, with varying results (lots of destroyed bike parts from the torque!). If the frame hadn't been so flexy at the time, I would probably not have had those problems and would've stayed with those motors. I still have them in the shed. The frame is a lot stiffer now after several generations of mods, and would probably work fine if I ever had to try it...but it uses two hubmotors now, and gets 0-20MPH acceleration of about 4 seconds, quick enough to avoid being run over from behind by cars at traffic lights when I get stuck as first in line, even with a bunch of heavy cargo on it. For the SB Cruiser Trike, the two rear hubmotors are fine right now, as they provide plenty of power to accelerate and haul even two Saint Bernards (one on the trike and one in the trailer) plus cargo and me, right up to the 20MPH speed limit here in AZ. :)But I do have eventual plans to add a third motor to the front wheel, for 3WD, though it will probably be a geared hubmotor I already have in the right size wheel, since I have to build a suspension fork that's better than what I have anyway. Someday I may revisit the powerchair motors via chaindrive, though, once I have to rebuild the trike or make a new one anyway, and can add a transmission to the rear end to drive both rear wheels (something better than a double-freewheel jackshaft, which while easy doesnt' work very well for my purposes).I do plan on doing a powerchair-motor-driven version of the flatbed trailer, though, so it has one on each side, primarily for power boost during startup or hills or slopes with heavy cargo or one of the dogs in the trailer.

    I wish we could have four-wheelers here, but AZ law says to be a bicycle it cant' have more than 3 wheels in contact with the ground. :-( Since I'd rather not ever have to deal with the legal issues involved should someone decide to not like my vehicles, I stick to the legal versions of them so they can't pick on me for that, at least. :)

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  • Electric Trike with bmx front end.

    If it helps you (or anyone else building one), I built a similar one a few years ago, but in semi-recumbent style with pedals/chain on front wheel:http://www.endless-sphere.com/forums/viewtopic.php...which was decommissioned last year to make a new one that has been much more useful to me:https://endless-sphere.com/forums/viewtopic.php?f=2&t=67833

    If you're gonna do any welding on it anyway, you can just build a front end; it doesn't have to be lower--look at the SB Cruiser:  I've attached an image of it with just the basic front frame shape put together, made out of the headtube, toptube, and downtube still assembled as original, off an old ten-speed bike.  The downtube is inserted into 2" square tubing which is the new downtube.  The new "toptube" is 1" square tubing a few inches above that, and a BB shell and cranks off a bike go between them at the angle change point. This whole thing then gets welded to whatever backend you have at whatever length puts the seat wherever it's comfy for you.  I just used the entire backend off Delta Tripper to simplify things as it was already how I wa...see more »If you're gonna do any welding on it anyway, you can just build a front end; it doesn't have to be lower--look at the SB Cruiser:  I've attached an image of it with just the basic front frame shape put together, made out of the headtube, toptube, and downtube still assembled as original, off an old ten-speed bike.  The downtube is inserted into 2" square tubing which is the new downtube.  The new "toptube" is 1" square tubing a few inches above that, and a BB shell and cranks off a bike go between them at the angle change point. This whole thing then gets welded to whatever backend you have at whatever length puts the seat wherever it's comfy for you.  I just used the entire backend off Delta Tripper to simplify things as it was already how I wanted it, I just hated the frontend of DT.    The pic shows the approximate longitudinal position of the rear wheels; I think mine ended up a bit longer wheelbase, by a few inches, can't remember for sure.   This makes the trike much longer, and also MUCH more stable in turns at speeds above a slow walk. ;-)    With the 20" rear and 26" front, and no load in the back, with the rear hubmotors, I can make a right turn at 16-18MPH depending on the road conditions.  I can make a left turn at 18-20MPH, as it's always a wider turn.   This means I don't get runover by car drivers too impatient to wait that extra tenth of a second for me to be past wherever it is they think they need to be, when I'm still in the turn lane.  ;-) I"m actually getting ready to move the seat forward a few inches, and move the BB/cranks to in front of the downtube, so I can get the dog crate forward just a bit, by custom building a cage-style one with fold-down cover-sides for shade and rain protection, with insulation in them/etc., cuz the new dog Teddy is a bit longer than Tiny was, and Yogi is longer than either one, so to fit comfortably in there they need more space.  Can't extend it in back cuz then their weight will be behind the axle and the trike will rear up like a scared horse.  ;-)

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