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    racebug 800W evo scooter made brushless in the alps

    Looks good, I agree on putting the motor on the inside. I would be afraid to clip it on something buzzing around. It would be nice if you could incorporate some suspension but it would require a complete design overhaul. What size wheels and tires are those? I like them. Carl
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    FlexScoot - tilting wheels scooter

    I think it's a pretty good product and I admire how you guys are handling the marketing of it. There are way too many out there that say it will change everything and it's green, bla bla bla. Go on merit and design alone, if they choose it because it's electric (green) that's their decision. I'd...
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    Bajaboard 4wd full suspension

    This thing is awesome. Do you guys have an estimated cost once you get into production? Great work Carl
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    Finally RUNNING!! page 5 ride vids Here!! need better qualit

    Sounds like everything is working good for you. Need some more videos of the system in action. I'd really like to use a system like this but I'm afraid the MAC may seem out of place and too large for most of the bikes I'm looking at. It would be interesting to see the difference between the MAC...
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    Finally RUNNING!! page 5 ride vids Here!! need better qualit

    Looking great man, glad to see that your life is on the mend from the past few weeks. We have all been there in one way or another. Those are some impressive trails you have there. Hell I woke up to an inch of white crap on the ground this morning, doubt I'll even be out for a hike today. I...
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    Finally RUNNING!! page 5 ride vids Here!! need better qualit

    It's looking good. It will be interesting to see how well it works. What kind of freewheel are you going to use on the crank? It's going to have to be a pretty stout setup for the torque of that Mac. Carl
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    Finally RUNNING!! page 5 ride vids Here!! need better qualit

    Way to go, I've been waiting for some updates. I figured that with holidays you've been as busy as the rest of us. Can't wait to see it all together and running. Carl
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    Finally RUNNING!! page 5 ride vids Here!! need better qualit

    Sorry no plasma, laser or waterjet where I work. We mainly do stuff out of bar stock and the way we do plate material is less than efficient. The cost shouldn't be too bad getting it cut on a plasma table or even a waterjet for that matter. The brackets shouldn't be too complex to cut out and...
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    Finally RUNNING!! page 5 ride vids Here!! need better qualit

    The more I see this setup the more I'm in love with it. I was thinking that for frames this normally wouldn't fit in would be to cut the down tube out and reinforce where you cut out with steel and some good epoxy. It would get the motor back and make it look cleaner. With the right mounting...
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    Re: avanti D8085 - maybe to be renamed D8-93??

    AJ, I think I found the thread where Timma tried the Bane Bot reduction. It seems like a lot of his text is missing. From what I can gather he was running a fair amount of power through the gearbox and possibly using a HV160 which could tear darn near anything apart. To keep on topic I would say...
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    Re: avanti D8085 - maybe to be renamed D8-93??

    ThePronghorn, nice Find on the BaneBots Planetary Gearbox. I didn't think I could find that much reduction for that kind of price. Awsome!!! Carl
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    Finally RUNNING!! page 5 ride vids Here!! need better qualit

    Around 5 inches is all it is? From what I could gather the spoke flange holes were at about 6.7" diameter. I didn't think it could go down that far, but I have been wrong many times before. I've been trying to find detailed dimensions on the Mac but not having much luck. I can't wait to see what...
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    Finally RUNNING!! page 5 ride vids Here!! need better qualit

    How is the progress on your trail drive coming? I like the idea of mac ran through the chain, quiet and powerful. How big is the diameter of the mac minus the spoke flange? The front tire does seem close to the motor, I don't see it hitting but other bikes out there may not have enough room to...
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    Re: avanti D8085 - maybe to be renamed D8-93??

    Those planetary gearboxes look nice. I've been looking for some and prices can be painful. Those seem pretty reasonable. I have found a few that are cheaper in a nema 34 flange mounting in that 90mm size. http://www.kelinginc.net/CNCGEARBOX.html The specs are a little lower but unless you are...
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    Sensored RPM Limit

    Well considering I don't want to tear things up too much on my first build I think I have to keep motor speed below 7k. I should be able to hit close to that with a standard the small standard Kelly. Is the sk3 6374 a 12 or 14 pole motor? I thought they were a 12 pole motor which could give me...
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    Sensored RPM Limit

    I was really looking at the SK3 6374 motors in any of the given kv values. I know they don't have as much mass to remove the heat but if you were to run high rpms and gear down to keep the amps down I would think it would be able to handle the heat. If hall placement won't work on the stator I...
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    Sensored RPM Limit

    I'm planning on building a Mid drive unit with a brushless outrunner and a 10:1 planetary gearbox. I would like to go with a sensored controller and fit the outrunner with halls. I am having a hard time finding what the electrical RPM limit is of the sensored controllers on retrofitted turnigy...
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    Hill Helper

    I'd love to see a 2 motor or 2 or more drive wheel friction drive. It would be interesting to see how much torque you could transfer to the tire. I've been thinking of some kind of 2 drive roller design that could be used somewhat off road. Carl
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    Commuter Booster - <1kg Friction Drive

    I'm loving how this is moving along. I had one thought for your brain box. If you are worried about people stealing the code and building their own brain box, don't build the box, have the customer build it. How hard would it be for you to make an e-book of the entire process with a list of...
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    Friction drive idea discussion

    Amberwolf, I really like the idea of using planetary gear sets for different gears. They are such a compact package and can give you some great gear reduction and decent efficiency. The only problem that I see with them is their cost. I've been looking for different products that use planetary...
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    Friction drive idea discussion

    I've been working on some designs for a friction drive system that utilize a belt to reduce the pulley speed. One of my "better" ideas uses two drive rollers for more surface area and a single timing belt. My planned reduction was a 2:1 using 2 or 2 1/2 inch drive rollers and a 250kv motor. My...
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    Water-Cooled, 63mm, 8kW

    It looks like it just uses the fixed end of the motor as a water cooled heat sync. There doesn't seem to be any cooling on the stator or the windings much beyond the cooling block on the fixed end. Carl
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    Single inverted swingarm friction drive prototype (failed)

    Nice work on the prototype. While a being supported on both sides of the tire would be best I think your idea still has possibilities. The weak point I see is the in the pivot point itself. If you used a piece of shaft hardened shafting (1/2" or 12mm) that was pressed into your swing arm and...
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    Commuter Booster - <1kg Friction Drive

    It sounds like you got most of it figured out. I had thought of Arduino after listening to a podcast about it. It should do everything that you want and be able to build it fairly easy. I know a lot of people are interested in not blowing up their esc. Keep up the good work Carl
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    Budget Lightweight Friction Drive

    Loving the video up until the crash. That sucks that your motor is fried, you could always rebuild and rewind for better torque. I was amazed at how fast you were able to go off road. I was wondering how much peddle assist you were using and what kind of slopes you were pulling, either way a...
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