Endless Sphere

A hang glider launch winch brings hours of fun...

Will there be a freewheel on the motor end? Otherwise you'll be spinning the motor full-time when pedaling which might defeat the purpose of just having it for a hill boost if it's dragging on the flats... Edit.. Just saw freewheel in the parts list And this is totally not a knock against mid drives...

One pack I have has a cheap BMS that just stops the charge when the highest group hit 4.2, and didn't do any noticable balancing, with the end result being the pack voltage kept going lower as the imbalance got worse. Cutting into the pack and manually balancing thru the BMS plug fixed it.

It won't hurt the battery, but most chargers aren't great at handling lots of vibration and moisture..

I just happened to see another article on it, now being marketed as the Gulas Pi1S.

It still needs to line up with the chain, leaving one side sticking out pretty far into the pedals, unless you use a longer than normal bottom bracket spindle.

The motor usually needs to be offset to one side to get the gear lined up with the back wheel, so it will poke out a lot to one side.

Super long case makes it a problem to fit anywhere near the pedals or legs.

The motor will handle it... The voltage isn't that important unless you're talking hundreds of volts. Some batteries don't go well in series depending on the BMS, so hard to say with certainty, but if it was bare packs, then yes, series is a easy way to get more speed along with a controller upgrade...

But put the uncooked heat shrink on first... It won't fit over the terminal after usually. They make adhesive lined ones too.. Very worth it for wet conditions...
You really want the crimps tight... It's surprising how much the wire will walk itself out of the terminal with repeated flexing cycles.

Depending on location, it prob is a scooter... Too slow to qualify as a motorcycle most places. And you could just sit on it and push yourself with your legs and prob go faster than the motor... A 4ah battery doesn't go very far or fast, unless it's 100v or something.

Prices are required in ads... And there no location into on that link, before anybody else wastes their time.

You don't need to balance the parallel cells... They all self even out to the same voltage. You just need to balance the series groups. But with that many in parallel you have to watch out for one cell going bad and overheating as the others discharge into it... That's where cell level fusing can ge...

It might recover just fine..

Did you have the little mouth on the axle pointing up catching rain or deep puddles?

That's the E-Rocket... Designed by some guy in Germany..

The EVG Mini's are are fun too if you get your hands on one... very go cart-y

Thanks for the kind words... I'm going to write it up in another post, but got both running and had super fun racing already.

And its too bad you're so East... otherwise theres the remote possibility I could help you find another one...

That tape is more for holding entire bundles in place, and not very waterproof. I would use a little dab of liquid electrical tape.. It's a black goo you brush on then it solidifies. Any regular tape is ok for electric insulation, but hard to get a truly waterproof wrap on it.

Were you running the phases to two different motors? That I could see working... But with both controllers to one motor, my gut feeling is that as soon as there's the slightest imbalance in the timing, today's better fault protected controllers see it as a short in the phases and shut down.

Short of physical shims, there's so much force in that last inch as it gets in the magnet field it's impossible by hand. But I doubt it will... I rig up a line coming off the side I'm holding that pulls evenly on the axle and loop it around my wrist also to slow down the entry as much as possible...

It wouldn't spin up... But I put very little time into pursuing it, as other projects beckoned, and so many cheap high power controller are available now, but most of the feedback from some weighty ESers was that unless you link them at the brain chip level it prob wasnt going to happen.

On my last big one (Hubmonster) I stood on the magnet ring up on some blocks and lowered the stator in with a block and tackle

Try taking off the first cover.. the stator isn't going to come out the other side of the bare magnet ring. Then you can put the covers on after. With strong magnets, I sometimes use thin high density low friction plastic cut into strips, and stuck around the perimeter of the magnet ring to keep it ...

It didn't work at all, at least on the controllers I used, even with only one powering the Halls and throttle.

Glad to hear it worked out for you..