Search found 7276 matches

by MadRhino
May 18 2021 4:46am
Forum: EBike General Discussion
Topic: What are the Uses of APK FILE Extension?
Replies: 0
Views: 134

Re: What are the Uses of APK FILE Extension?

Apk is a file or group of files that are compressed in a format to be read or installed on android. It can be anything, from data files to a complete installation package of an android app.
by MadRhino
May 16 2021 9:40pm
Forum: EBike General Discussion
Topic: phaserunner and asynchronous induction motor
Replies: 2
Views: 128

Re: phaserunner and asynchronous induction motor

Nope. I suggest that you buy it in a kit with their controller, that would be the DECO-165 or 175
by MadRhino
May 16 2021 9:08pm
Forum: EBike General Discussion
Topic: Issue with the rear shock on my Recumbent - new setup
Replies: 14
Views: 384

Re: Issue with the rear shock on my Recumbent - new setup

You can screw the preload ring nut further more, I see it still has some thread as it is about on the middle right now. Use some penetrating oil if it is stucked. If you need a stronger spring just buy the next weight up ( the spring weight is stamped on it) of the same size and length.
by MadRhino
May 16 2021 1:35am
Forum: EBike General Discussion
Topic: Disaster today, almost set two fires with BBSHD and 52v batteries
Replies: 62
Views: 1094

Re: Disaster today, almost set two fires with BBSHD and 52v batteries

A PSU does work like a charger, only more flexible. Meanwell Power supplies have a pretty wide range of voltage adjustment, they can be assembled in a series to make any voltage that you need. Some models can be paralleled, making the power required to charge very fast. Of course, that should be acc...
by MadRhino
May 15 2021 8:39pm
Forum: EBike General Discussion
Topic: Disaster today, almost set two fires with BBSHD and 52v batteries
Replies: 62
Views: 1094

Re: Disaster today, almost set two fires with BBSHD and 52v batteries

The method used to charge a battery doesn’t make it any more likely to short or reverse polarity. Charge it solar in a week, or with big PSU’s in 10 minutes, when it is charged it is charged and exactly the same. I would guess thst most BMS have protections against reverse polarity and short, or eve...
by MadRhino
May 15 2021 8:20pm
Forum: EBike General Discussion
Topic: E-bike mid-drive motors hardly outperforms hub motors
Replies: 93
Views: 2813

Re: E-bike mid-drive motors hardly outperforms hub motors

Yep, mtb cyclists will definitely prefer a BB drive. Hub motors are closer to motorsport in the mountain. You can’t ride them as fast on technical sections or downhill because of the rear suspension and weight are a handicap. They can’t be good jumpers as a lightweight, well balanced bike does. But,...
by MadRhino
May 15 2021 7:12pm
Forum: EBike General Discussion
Topic: Disaster today, almost set two fires with BBSHD and 52v batteries
Replies: 62
Views: 1094

Re: Disaster today, almost set two fires with BBSHD and 52v batteries

The first thing I would check is the XT90 to Anderson adapter, that could be shorted because the XT connectors are soldered with + and- wires very close together, or reversed because a stupid mistake installing Andersons housing colors can make you plugging them reversed polarity. I don’t know about...
by MadRhino
May 15 2021 6:36am
Forum: EBike General Discussion
Topic: Disaster today, almost set two fires with BBSHD and 52v batteries
Replies: 62
Views: 1094

Re: Disaster today, almost set two fires with BBSHD and 52v batteries

Well, the BBSHD and the battery had nothing to do with that, and likely hadn’t suffered any damage. Sh*t connectors are dangerous, first lesson learned. Now cut off the XT90 and crimp some genuine pp75 Andersons. Then test the controller and battery to make sure. Replacement of the display connector...
by MadRhino
May 13 2021 4:17am
Forum: EBike General Discussion
Topic: When you make bonehead errors when lacing a NuVinci for use with BBSHD
Replies: 7
Views: 215

Re: When you make bonehead errors when lacing a NuVinci for use with BBSHD

I wonder why they drilled the rim 72h. I see no reason for that, other than confusing you into lacing a wrong pattern.
by MadRhino
May 12 2021 10:24pm
Forum: EBike General Discussion
Topic: is torque a good predictor of how easy it will feel to go uphill?
Replies: 5
Views: 331

Re: is torque a good predictor of how easy it will feel to go uphill?

So yeah it's all about torque for hills, and torque comes directly from amps. Well, we are talking about torque at the wheel. Torque can be produced by gearing down too. So lower Amps are required for equal torque, only slower. That is why climbing speed is also related to motor power produced, for...
by MadRhino
May 12 2021 2:46pm
Forum: EBike General Discussion
Topic: Help with choosing the right battery for powerful motor
Replies: 22
Views: 722

Re: Help with choosing the right battery for powerful motor

I would look into used leaf cells or other automotive grade cells that will fit. Sounds like a great idea, I did some research, do you know if the wiring has to be changed or just used leaf battery can be easily connected to sabvoton controller? You’d have to make your own battery with used Leaf ce...
by MadRhino
May 11 2021 4:47pm
Forum: EBike General Discussion
Topic: speed relationship between wheel and bike
Replies: 12
Views: 372

Re: speed relationship between wheel and bike

There can’t be a formula that will be exact. First you bother about meaningless factors like steering angle and camber, because bikes don’t need steering to turn or, if little of it they ever do, it is a slight counter steering that initiate the turn. Bikes need steering to turn, only at very low sp...
by MadRhino
May 11 2021 3:45pm
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1701
Views: 229302

Re: 2 Speed Xiongda hubmotor

Available now DT Swiss HX 531 29er 36h at wheelbuilder.com. It is a UST lightweight mtb racing rim. It is very stiff but thin hard alloy 30mm wide, meaning it is very resistant to dent or deform, but it could crack on a hard hit. I believe the Stans no Tube MK3 rim is also available now in 29er 36h....
by MadRhino
May 10 2021 3:08pm
Forum: EBike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1701
Views: 229302

Re: 2 Speed Xiongda hubmotor

My experience is that tubeless is an advantage only with foam inserts (see Cush Core). And yeah, shop for rims. You don’t want to buy complete wheels, with hubs that you won’t use, spokes that will be the wrong length, and a lacing job that you will have to dismantle. All this can pay for much bette...
by MadRhino
May 10 2021 2:23pm
Forum: EBike General Discussion
Topic: KT controllers, can you configure watts delivered at various levels?
Replies: 7
Views: 304

Re: KT controllers, can you configure watts delivered at various levels?

The 3 speed function on those controllers can’t be programmed for power, only speed limitations. But, riding slower does consume lesser average power. Still, even when set to slower top speed, the motor will pull all the current that a controller can feed when motion resistance is hard enough.
by MadRhino
May 09 2021 5:41pm
Forum: EBike General Discussion
Topic: is torque a good predictor of how easy it will feel to go uphill?
Replies: 5
Views: 331

Re: is torque a good predictor of how easy it will feel to go uphill?

Those BB drives are slow climbers but yes, gear ratio does make them climb easily. Torque does make acceleration, and/or climbing ability of course. Yet it is the total watts that are making the true power, thus a better measure of the speed that a motor can attain up a hill. Low power with proper g...
by MadRhino
May 05 2021 9:37pm
Forum: EBike General Discussion
Topic: E-bike mid-drive motors hardly outperforms hub motors
Replies: 93
Views: 2813

Re: E-bike mid-drive motors hardly outperforms hub motors

Well, riders who don’t care about efficiency and beat the crap off their bikes day after day, are much better with hubs because mid drives are making them more time tempering than riding.
by MadRhino
May 05 2021 9:28pm
Forum: EBike General Discussion
Topic: Help me choose the best / right controller ?
Replies: 3
Views: 1008

Re: Help me choose the best / right controller ?

4110 mosfets are rated 100v, and I run them with 24s lipo reliably. Yet, the controllers often need some work to make them reliable running high power 24s: Beefing the traces, better capacitors, bigger wires.
by MadRhino
May 05 2021 1:54pm
Forum: EBike General Discussion
Topic: E-bike mid-drive motors hardly outperforms hub motors
Replies: 93
Views: 2813

Re: E-bike mid-drive motors hardly outperforms hub motors

Yep. Hubs are simple, efficient, durable, and easy to build. Mid drives are for extreme requiremrnts Extremely low or extremely high power Extremely light weight Extreme terrain So many bike manufacturers are building with BB drives nowadays because of the low power legal limitations and the light-w...
by MadRhino
May 05 2021 12:50am
Forum: EBike General Discussion
Topic: building chopper e-bike
Replies: 7
Views: 294

Re: building chopper e-bike

Choppers are custom work. You can buy a kit, but you still need to build custom wheels, and to choose a controller for the voltage/wattage that you want to feed. Then you need to assemble a battery in the shape to match the frame. I believe that you should start with showing us the frame that you wa...
by MadRhino
May 04 2021 6:41pm
Forum: EBike General Discussion
Topic: Maximum allowable size disc rotor on NuVinci N171 hub?
Replies: 5
Views: 185

Re: Maximum allowable size disc rotor on NuVinci N171 hub?

You don’t need braking power on the rear, so you can use a smaller rotor. But, braking modulation precision is most important on the rear because it is easy to lock the rear wheel. Thus, your best choice would be a smaller rotor and hydro caliper, in order to prevent applying brutal braking kicks to...
by MadRhino
May 04 2021 6:20pm
Forum: EBike General Discussion
Topic: E-bike mid-drive motors hardly outperforms hub motors
Replies: 93
Views: 2813

Re: E-bike mid-drive motors hardly outperforms hub motors

I don’t know where your comparison come from, but I assure you that the acceleration of a 250w hub is desperately lame as compared to a 250w BB drive on the low cog. There must be some problem with his simulation, then. It's in the article he links to. We should bear in mind that your kind of bicyc...
by MadRhino
May 04 2021 2:50pm
Forum: EBike General Discussion
Topic: E-bike mid-drive motors hardly outperforms hub motors
Replies: 93
Views: 2813

Re: E-bike mid-drive motors hardly outperforms hub motors

I mean, if you are building a low power bike, a mid drive does let you build it much lighter and still give it good torque. Would you consider his "250W" motor to be "low power"? He uses the same motor for both, in the simulation, and the theoretical advantage appears in the res...
by MadRhino
May 04 2021 11:21am
Forum: EBike General Discussion
Topic: E-bike mid-drive motors hardly outperforms hub motors
Replies: 93
Views: 2813

Re: E-bike mid-drive motors hardly outperforms hub motors

Mid drives are best at both ends of performance scale, but disadvantaged in the middle. I mean, if you are building a low power bike, a mid drive does let you build it much lighter and still give it good torque. And, if you want to build a motorcycle, only mid drives can give it competitive performa...
by MadRhino
May 03 2021 4:10pm
Forum: EBike General Discussion
Topic: Help with choosing the right battery for powerful motor
Replies: 22
Views: 722

Re: Help with choosing the right battery for powerful motor

Motors are damaged by heat. Yet, it is pretty uncommon to overheat a big DD hub. You need to be unconscious to do that. Now most big hubs are equipped with a temp probe, and many controllers have a temp cut-off setting. Even without any temp protection or monitoring, big hubs need to be abused badly...