Recent content by whitecat

And, cooling characteristics are dependent on how much fill the motor has, as it correlates with total power output - something to have in mind when designing stators. I had to redesign a very badly designed line of motors in one instance where original designer pushed thermal design to it's...

I'm not familiar with exact wire gauge size, wire coating insulation class required, and all of the rest of characteristics that this motor needs. I would advise you not to try rewinding it until you know all of that, otherwise results might be good, or might be terrible. You simply can not know...

Sorry to say so, but those are what look to me at least like fried windings. Epoxy coating seems like it is burned up. I would say it needs to get redone, pull out old windings and insulation, put in new insulation and windings, solder connections, seal insulation, epoxy spray it, oven baking...

I agree with you that knobby tires add a lot of rolling resistance. But these two that I posted here are two tires with the least rolling resistance that I could find, while they still have a high level of grip in all conditions. There is a difference, however, in rolling resistance between a...

Can you post a link to the charger you bought? I would like to know which one it is, and how much does it cost. Thank you.

So, does anyone here have some advice regarding that Lipo charger? I would think that someone here would have the experience with them?

Hehe your friend sounds a lot like me! Not defeated if bike is in one piece and can be ridden. Even if the rider is a bit bent out of shape :D As they say, injuries heal back but the bike needs to be repaired eh. And to get back to the tires - maybe I should have been more precise - the problem...

Just a timely warning regarding your tire choice - City Slicker lives up to it's name, you don't want to ride that tire when it's wet outside. I have done a few thou miles on them, and then I finally had to exchange them for something with more grip in wet conditions. That tire is the cause of...

It seems I found the answer to my own question by reading around, someone was also testing Turnigy Lipo at about 50V, 5Ah if I recall correctly, and it gave him exactly 6 miles range - or 10 km, at about 45 kmh, wot, and at about 35A consumption, so it comes out to roughly 2kW power. And that...

That is exactly why I resigned from hybrid and road bikes for commuting. Now it is MTB with the widest semi slick or block style thread tire I can find. It had saved me on more then one occasion, when I had to punch directly over some tracks and rough asphalt at speed. I had nowhere to go...

So you dont think I could ride for 10 km or 6 miles on that 5 Ah pack? I would be riding almost always with some pedalling, and motor only for short stretches of road (2 km at most) where I would be going over 40 kmh, too fast to pedal along. I am aware of the addiction of burning power quickly...

Thats a complete and utter dissapointment for the price it is asking; those ppl seem so self satisfied talking about their overblown bike, but it is obvious noone has ever ridden an E-bike before. It they had, they would have known mayor errors in design of this thing they made - no suspension...

Spec on that page says 18.5V per pack, so 3 x 18,5 = 55,5V, am I right or? Can't seem to find where you get that 66V from? Maybe I am missing something, well, I am tired. Btw, that 5Ah should move me along for at least 10 to 12 km range if I'm calculating correctly. That should be enough for my...

Wouldn't it be possible to run 3 of them connected in series, giving 55V nominal with 5Ah?

Hm, hm, those Hobby King LiPo's definitively look good! Three of them would give about 55 V, that would be good for 50 kmh, and discharge rate is insane, 30C! And all that for under $200 for 5Ah, not bad at all. I've been working with electronics a lot before, and I am familiar with requirements...