Endless Sphere

That should work.

Are the coils going to be a single layer?

Interesting... It says:

The family firm's Invercargill branch, founded by Hayes' son Irving Hayes in 1934, still exists as a hardware store; memorabilia from Southland inventor and motorcyclist Burt Munro (depicted in The World's Fastest Indian) is displayed in the store's museum.

Those are some pretty interesting rims there. Never seen anything like that. Do you use a single inner tube? Yeah, not much clearance for the caliper. I guess you'll find out when they arrive. If the disks were a little bigger than the inner spoke flange, it would give you a lot more clearance. I've...

I like the kapton tape , and the epoxy ideas, I'll give them a try. :thumb: I could maybe try a piece of polypropylene bag as a barrier as well, and use it to pull the coil off when done. I don't think it will stick to anything. Plastic bags work well too. Epoxy won't stick to it. You just need the...

That's pretty cool.

Just from my bike riding experience, a shark sized battery pack can output several times more power than my (weak) leg muscles for over an hour. More than 10x for shorter bursts.

Good point about the spacers. I used Nomex paper and fiberglass tape which won't melt or abrade too easily. My cells get pretty warm during discharge but one face of each brick is against the container wall so heat has a place to go.

Please correct me if im wrong, but in the case of a building a high capacity high discharge battery pack. Would this be the best way to build the pack to be able to handle the high current, deliver the high current, and keep the battery pack 'cool'. I used a similar approach and it has worked very ...

Another approach might be to use a tapered form made of polyethylene or polypropylene that won't stick to epoxy, then wind the coil with some epoxy, let it cure, and slide it off the form. Silicone grease on the form will help keep it from sticking. Once the coil is cured, it will be like a solid pi...

srapy wrote: ↑

May 22 2020 10:50am

After changing to 16S, doing lots of experiments, upgrading to FW 5.0 I reached 15,4KW peak at 440 Phaseamps.
Heres an unspectacular video of the bike and a picture of it.

Nice. How is it on pavement? You get more traction.

Yes, that's the way it's going to work. If you slowly advance the throttle when it's motoring in PAS, there will be a dead spot until you bring the throttle up enough to make the motor spin. The real fix would be a firmware change but that's not an option at this point.

Got another 0.3" here. Very unusual for this time of year, but it has cleared out now and looks like the rainy season will be over. I'll be interested to see if the grass turns green again. It all turned brown since the rains earlier in the season.

X-Nitro wrote: ↑

May 19 2020 12:25am

Orlov got his hands on a nice looking e-moto a few weeks ago..
https://www.youtube.com/watch?v=_mhMqbLZ8zM

That looks like a pretty nice bike. I love the part at the end of the video where he goes to the gas station.

Keep in mind that if you slowly advance the throttle, at some point the transistor kicks in and disables PAS. Right at this point, the throttle setting may be lower than what is needed to make the motor spin, so power will drop out until you advance the throttle a little more. You could try raising ...

Can anybody tell me if I change the resistor to a lower value like 50K will my throttle take control before the PAS and give me smooth throttle control at low speed? Changing the resistor won't change the point where the throttle takes over by much. Changing the throttle low setting in the programm...

If the belt comes off to the outside where the riders right leg is, well that can get dangerous. If the belt comes off either side it can get dangerous. Once the belt comes off, it will immediately stop moving. That said, as long as the sprockets are properly aligned and the axle doesn't come loose...

Picked up about 0.3" since yesterday. A few more waves are in the forecast. It's just enough to give the soil enough moisture so it's not dusty. Perfect riding conditions.

I'd recommend installing the rear sprocket so the flange is on the inside. This way if the belt decides to come off, at least it won't get caught on the spokes. It also makes it easier to inspect the teeth and makes it easier to take off the rear wheel.

I've been noticing that burned-out feeling a lot lately and my projects are far less ambitious. I think it has to do with being locked down from the virus for so long. But I do feel better whenever I complete something. Once your brakes show up, you'll be on the verge of that first test drive. Looki...

With a resistive heater, the resistance is pretty low when it's cold so there will be an initial high current needed to get it glowing.

I got this one last year:
It's able to run my 1750w microwave oven or a 1500w electric heater. So far it has worked well.

Hey there Electricgod, I see you haven't been online for a little while, I hope you are well. I have a BMS that failed; two of the mosfets cracked and are missing chunks. I was reading this thread in hopes to repair and mod my BMS but unfortunately all of the pictures are broken and as they say a p...

It probably won't make a really noticeable difference. Having more mechanical strength has a lot of advantages too. Motor design is all a bunch of trade-offs.

I'd be inclined to try re-flashing the software if you can figure out what the right version is. Possibly something in the file got corrupted. I've never seen a cruise control feature on the BBSxx.

Those are beautiful.

I forget, why did you not use a brim on the end turn area? From what I read before, that's a way to reduce copper losses and weight.

That's pretty bizarre. Never heard of that symptom before with a BBS02.
When you stop it with the brake lever switch, does it start going again when you release the brake?

Can those little jumper resistor blow? Probably not. It's just a piece of wire inside a resistor package. The next one in line going to the main chip could blow and would be worth checking. If a FET blew, you'd have other problems and they are generally obvious. This is pretty easy to check by disc...