Search found 12085 matches

by neptronix
Mar 22 2019 5:16pm
Forum: Motor Technology
Topic: In search of the illusive High-Torque, Low-Speed hub motor
Replies: 8
Views: 208

Re: In search of the illusive High-Torque, Low-Speed hub motor

With a motor that has a higher kV than you need, just run lower voltage and higher amps. A MAC wouldn't cut the mustard if you really have 15% grades to climb in such a large wheel. Here's an interesting idea for you. There's a 3000w cyclone motor out there that's geared for something like 500rpm ou...
by neptronix
Mar 22 2019 12:09pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 261
Views: 20651

Re: GNG X1-pro 3000w

I haven’t found a metal option for a PF30 to threaded BSA adapter. I was also concerned about running 3000W through it. Anyone here have experience with this? Running 3000w through an adapter... even a good one.. does not seem like a good idea. You want as little movement as possible in that bottom...
by neptronix
Mar 22 2019 9:36am
Forum: E-Bike General Discussion
Topic: Opinions requested by ambitious greenhorn
Replies: 22
Views: 356

Re: Opinions requested by ambitious greenhorn

neanderthul; I used an infineon clone 18fet on that bike ( west coast electrics, em3ev, and some others sell it ), but that's kind of an older controller that's fallen out of favor. I have no experience with kelly controllers.. but beware that their specifications are misleading if you don't underst...
by neptronix
Mar 21 2019 1:47pm
Forum: General Discussion
Topic: How to mount full-size flag pole to standard 26" bike?
Replies: 11
Views: 200

Re: How to mount full-size flag pole to standard 26" bike?

Ask your local hardware store about U bolts or circular clamps. You may find what you need there.
There are also flag holders for motorcycles out there that you might be able to modify with a drill and/or angle grinder
by neptronix
Mar 21 2019 1:43pm
Forum: E-Bike General Discussion
Topic: Opinions requested by ambitious greenhorn
Replies: 22
Views: 356

Re: Opinions requested by ambitious greenhorn

Will women be more interested in me when they see me with my amazing bike? I haven't had that experience, but i'm maybe a 6 in the looks department. The only time i've got a thumbs up from a female was when i was seen riding my cannondale semi recumbent, which is the dorkiest thing i've ever sat on.
by neptronix
Mar 21 2019 1:38pm
Forum: E-Bike General Discussion
Topic: Opinions requested by ambitious greenhorn
Replies: 22
Views: 356

Re: Opinions requested by ambitious greenhorn

Look at the leafbike build in my sig. It might be up your alley. It uses a 35mm wide motor and can absolutely do 40mph all day. The motor is also easily 10lbs lighter than the QS, and probably a tad more efficient. Mid drives are also popular, but beyond 1kw, most people have issues with drivetrain ...
by neptronix
Mar 21 2019 1:14pm
Forum: E-Bike Technical
Topic: Overheating middrive motor?
Replies: 22
Views: 318

Re: Overheating middrive motor?

Not to be harsh but if you wanted a +2kw motor you should have bought one. Even 1.6kw is pushing it for the mini. Well, noob is in his username :mrgreen:. Unfortunately many of us come here because we learned something the hard way! Usually a 2kw motor is a 2kw motor. I talk about common vendor fib...
by neptronix
Mar 21 2019 10:16am
Forum: E-Bike General Discussion
Topic: Disadvantages of front wheel drive for ebike?
Replies: 10
Views: 297

Re: Disadvantages of front wheel drive for ebike?

Disadvantages: 1) Less traction, due to the power being put where ~33% of the rider weight is. Same problem with a rear wheel drive truck, where the motor and rider are in front, but the power is applied to the back. 2) Only safe scenario is with a steel fork because front dropouts are typically wea...
by neptronix
Mar 21 2019 8:48am
Forum: E-Bike Technical
Topic: Overheating middrive motor?
Replies: 22
Views: 318

Re: Overheating middrive motor?

Looking at the luna website, they claim it's a 2000 watt motor ( realistic continuous wattage is probably much lower than that ) and you're running 2400w through it.. Now, if you go look through cyclone taiwan ( the source of all these parts ), you'll see that their biggest motor is rated at ~1600w....
by neptronix
Mar 21 2019 8:40am
Forum: E-Bike Technical
Topic: Overheating middrive motor?
Replies: 22
Views: 318

Re: Overheating middrive motor?

lower gearing or less amps.. your motor is not up to the task of the power being put through it. Is this the luna cycles mini cyclone kit? because some complaints about it the motor not being rated for the load floating around the internet.. ( not uncommon - luna exaggerates a lot of their specifica...
by neptronix
Mar 21 2019 8:39am
Forum: E-Bike Technical
Topic: Overheating middrive motor?
Replies: 22
Views: 318

Re: Overheating middrive motor?

Lower gearing or less amps.. your motor is not up to the task of the power being put through. If the case is too hot to keep your hand on, it's very likely over 100C inside, which is the point at which most motors start to take damage. Is this the luna cycles mini cyclone kit? because some complaint...
by neptronix
Mar 20 2019 9:02pm
Forum: Battery Technology
Topic: What battery to choose after your last one burned your house.
Replies: 54
Views: 1683

Re: What battery to choose after your last one burned your house.

Also, kudos for getting back on the electric steel horse, dogman.
by neptronix
Mar 20 2019 8:59pm
Forum: Battery Technology
Topic: What battery to choose after your last one burned your house.
Replies: 54
Views: 1683

Re: What battery to choose after your last one burned your house.

I remember when liveforphysics sorted this out many years ago. The one really impressive cell in his tests were the ungodly heavy headways lifepo4 cells. But who wants those on their bike? worse than a ping.. 18650s and pouch cells contain the same flammable elements and respond the same when abused...
by neptronix
Mar 20 2019 8:00pm
Forum: E-Bike Technical
Topic: Mid drive with GT i-Drive
Replies: 4
Views: 130

Re: Mid drive with GT i-Drive

I had one of those bikes for a nanosecond. Beautiful looking bike, but i heard about the frame weakness after i bought it.. then looked it over.. and decided it was a no-go for a hub motor.

Mid drives weren't really a thing at the time. But i think the BB area made things a bit complicated.
by neptronix
Mar 18 2019 10:49am
Forum: E-Bike Non-hub Motor Drives
Topic: Bafang i thin I hate you... ( HALP ME!)
Replies: 5
Views: 352

Re: Bafang i thin I hate you... ( HALP ME!)

I was going to say it might be built on a friday ( bad case or something else ).. because it sounded like you gave it a hell of a try..

The QS is enormously heavy and many smaller DD hubs can be just as reliable.. and a little more efficient and a whole lot lighter.
by neptronix
Mar 18 2019 8:47am
Forum: General Discussion
Topic: using voltage sag as indication of bad battery
Replies: 11
Views: 191

Re: using voltage sag as indication of bad battery

Yes.. voltage sag will increase as IR goes up and capacity goes down. The biggest variable will be temperature, as temperature has a sizeable influence on IR. So the before and after tests need to be done at roughly the same temps.
by neptronix
Mar 17 2019 2:52pm
Forum: E-Bike Non-hub Motor Drives
Topic: Bafang i thin I hate you... ( HALP ME!)
Replies: 5
Views: 352

Re: Bafang i thin I hate you... ( HALP ME!)

I'm no bafang mechanic but i can tell you that seeing these broken is no surprise. You may be able to fix it but another part will eventually go. The drive has multiple weak points. Over half the parts are known to not be strong enough for perpetual use. If you have access to machine shop goodies, i...
by neptronix
Mar 15 2019 9:15am
Forum: E-Bike General Discussion
Topic: Odd thing
Replies: 4
Views: 220

Re: Odd thing

You should really get a watt/volt/amp metering device. It will teach you a lot about power consumption. Whatever display you have will not indicate much of use ( what does a bar represent, exactly? :roll: ). These have always been cheap and pretty reliable: https://hobbyking.com/en_us/turnigy-180a-w...
by neptronix
Mar 15 2019 9:03am
Forum: E-Vehicles General Discussion
Topic: Is this correct to say ?
Replies: 2
Views: 107

Re: Is this correct to say ?

Yes, as long as the half-sized battery has the same internal resistance ( and thus double the load doesn't double the voltage sag )

IE.. the 2kwhr battery is 2C capable and the 1kwhr battery is 4C capable.. therefore the efficiency which the battery delivers power to the controller is unchanged..
by neptronix
Mar 13 2019 12:03pm
Forum: E-Bike Technical
Topic: Help with Magic Pie Edge
Replies: 6
Views: 187

Re: Help with Magic Pie Edge

Have you contacted the seller for support?

broken front forks with front motors is not uncommon. What kind of fork was it?
by neptronix
Mar 07 2019 9:36pm
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 166
Views: 7320

Re: Revolt RV-series motor review and comparisons

The disappointing part with them is when they went to thinner lams, the motors didn't get any better. Since then I've always visualized them as some Israelis using ultra-cheap labor Palistinians to wind their motors. Hmm... did they lie about the laminations? I don't see how the motors couldn't hav...
by neptronix
Mar 07 2019 8:36pm
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 166
Views: 7320

Re: Revolt RV-series motor review and comparisons

I encountered this company sometime around 2014 when they started spamming the endless sphere facebook page. I remember thinking... okay, let's give these guys a chance because they're a small motor manufacturer and it seems like a cool item for ES users.. I asked for a standard dyno sheet and what ...
by neptronix
Mar 07 2019 8:17pm
Forum: Items for Sale - Used
Topic: Aden Sports Race Kit 7KW Downhill eBike 75kmh [EU]
Replies: 3
Views: 470

Re: Aden Sports Race Kit 7KW Downhill eBike 75kmh [EU]

Hell of a deal. Good luck with the sale.
by neptronix
Mar 07 2019 8:04pm
Forum: Stand-up E-scooters and E-skateboards
Topic: 70% throttle deadband
Replies: 8
Views: 225

Re: 70% throttle deadband

This is what controllers do when they cannot handle the eRPM of the motor. They act as an on/off switch. The effect gets worse, the higher the voltage goes. If this controller came off a bike with a hub motor, it would be surprising that the motor would even run at all. My old MAC motor ( 16 poles x...