Search found 7551 matches

by Chalo
Feb 26 2021 10:20am
Forum: E-Vehicles General Discussion
Topic: Can Tesla converted to diesel?
Replies: 15
Views: 255

Re: Can Tesla converted to diesel?

It sounds like you could use portal axles, which will give you gear reduction plus extra ground clearance. Thank you! It is very good idea! A quick search returns with ZF electric portal axle. https://www.youtube.com/watch?v=23-i0niqDP4&ab_channel=ZFGroup 250KW / 22.000 NM! No need that yellow ...
by Chalo
Feb 24 2021 6:34pm
Forum: EBike Build Threads
Topic: Can I and should I do this
Replies: 12
Views: 272

Re: Can I and should I do this

with disc mounts if you must have disc brakes (they don't improve anything except your bike's cleanliness). Not to restart that old argument, but it depends on what you are starting with. Take a spin on an EZIP trails with rim brakes, and you will appreciate disks more. I've dealt with cheap and aw...
by Chalo
Feb 24 2021 5:27pm
Forum: EBike Build Threads
Topic: Can I and should I do this
Replies: 12
Views: 272

Re: Can I and should I do this

Hi everyone. New here and need your help. I have an older (mid 1990s) Dean Titanium Bicycle that weighs about 12 lbs loaded. No, it doesn't. I’m thinking of making it an e bike. Don't do that. You'll only screw up a nice pedal bike, and not enjoy any of its nicer qualities after your convert it. If...
by Chalo
Feb 24 2021 5:16pm
Forum: E-Vehicles General Discussion
Topic: Can Tesla converted to diesel?
Replies: 15
Views: 255

Re: Can Tesla converted to diesel?

I'm planning to built a 4x4 off road vehicle and I would like to feed all 4 DC hub motors with 50 kw diesel with DC generator. [...] but I need a very low rpm engine since tyres are big and vehicle speed will be limited to 40 mph. It sounds like you could use portal axles, which will give you gear ...
by Chalo
Feb 22 2021 3:14am
Forum: EBike General Discussion
Topic: Help with an e-bike for my courier job
Replies: 19
Views: 436

Re: Help with an e-bike for my courier job

I want to go 15-20 mph for 10 hours. I'm wanting a 150-200 mile range. As others have said... naw. Instead plan on having multiple packs that you can rotate out, running one while others are charging. This is how festival pedicabbers get the endurance you're looking for. You can probably reduce you...
by Chalo
Feb 20 2021 2:30am
Forum: Battery Technology
Topic: Trying to increase my batteries longevity but did i actually destroy it doing so?
Replies: 22
Views: 510

Re: Trying to increase my batteries longevity but did i actually destroy it doing so?

If the pack you have tends to become unbalanced, consider adding one of these: https://www.ebay.com/itm/4S-8S-13S-20S-Lithium-Battery-Active-Equalizer-Protection-Board-Balance-Board/383907966158 This is one example out of many such boards that are available. It will balance the cells whenever an imb...
by Chalo
Feb 19 2021 2:31am
Forum: EBike Build Threads
Topic: New build help. Is this safe?
Replies: 28
Views: 835

Re: New build help. Is this safe?

Yeah, I tend to believe cheap BMSs cause about as many dangers and problems as they solve. I get the rationale for pack sellers trying to idiot-proof their product, but I'd rather move the balancing hardware off the bike and run the proven fast-blow ANN fuse for overcurrent protection. This implies...
by Chalo
Feb 19 2021 2:07am
Forum: EBike General Discussion
Topic: Help me Electrify it!!
Replies: 32
Views: 993

Re: pas or no pas on cargo bike

My goals are to be able to maintain a steady speed lets say 10-12 mph max . I've had her out on the bike and have no problem getting up to speed on the flats but once I get the motor on is using just throttle to maintain speed practical? Am I going to regret not having pedal assist down the road? I...
by Chalo
Feb 17 2021 8:53pm
Forum: General Discussion
Topic: Legends dropping like flies
Replies: 433
Views: 70606

Re: Legends dropping like flies

https://www.foxla.com/news/rush-limbaugh-conservative-talk-radio-pioneer-dead-at-70 https://ktla.com/news/nationworld/conservative-talk-show-radio-host-rush-limbaugh-dies-at-70/ :cry: I hope he suffered greatly for a long time. He made this country a worse place, and he made it a little better by n...
by Chalo
Feb 17 2021 4:48pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Looking for featherweight geared hubmotors, >10kW
Replies: 15
Views: 493

Re: Looking for featherweight geared hubmotors, >10kW

kubark42 wrote:
Feb 14 2021 12:52pm
And none can get any kind of decent power density at 1000-1500RPM.
That's so very slow for a prop. What gigantic diameter are you working with?
by Chalo
Feb 17 2021 3:28pm
Forum: EBike General Discussion
Topic: Battery continuous discharge amp and controller amp need to match?
Replies: 31
Views: 1143

Re: BMS and motor match up

Planning to buy 72V batteries for my 4000W motor from a distributor. The 72V 100A BMS battery description on the website says it’s suitable for motors of between 1000W-6000W. Is that normal for a 100A BMS to be compatible with 1000W-6000W motors? 72V X 100A = 7200W After efficiency losses, that cor...
by Chalo
Feb 15 2021 10:54pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6565
Views: 531852

Re: new eZip motor

latecurtis wrote:
Feb 15 2021 8:15pm
I just saw on the news that it will soon be totally illegal to buy 18650 cells online.
Yeah... fat chance of that. This is a country where you can buy designer drugs by the kilogram, online.
by Chalo
Feb 12 2021 12:45pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Looking for featherweight geared hubmotors, >10kW
Replies: 15
Views: 493

Re: Looking for featherweight hubmotors, >10kW

When comparing the weight of these different systems, remember to include the weight of ratio reduction and motor/jackshaft mountings together with the aero motor. Also be sure to derate power output in consideration of the fact that the motor won't be driving a propeller or generating very much air...
by Chalo
Feb 12 2021 12:37pm
Forum: EBike General Discussion
Topic: ideal front fork for street: Speedway style leading axle?
Replies: 18
Views: 356

Re: ideal front fork for street: Speedway style leading axle?

Cannondale had some rare telescopic forks a while back that used ball bearings in there which probably helped. They used needle roller bearings, rolling on flats machined into the sliders. The two-leg Moto version used the same internal mechanism as the single slider Headshok and Lefty models. The ...
by Chalo
Feb 11 2021 7:52pm
Forum: EBike Technical
Topic: help with id of components
Replies: 7
Views: 187

Re: help with id of components

That bike is so generic, it might as well be a kit homebuild. If you regard each of its components as no-name eBay stuff, you'll get on with it fine.
by Chalo
Feb 11 2021 5:45pm
Forum: EBike Build Threads
Topic: Converting my bike
Replies: 6
Views: 263

Re: Converting my bike

fatty wrote:
Feb 11 2021 4:29pm
No harm in a rear hub motor -- it'll be the cheapest, simplest, easiest.
Easiest, sure.

But I have seen all kinds of frames damaged by inadequate or inadequately tightened torque arms. Paradoxically, in this case it takes more commitment to doing the job right when you do it the easiest way.
by Chalo
Feb 11 2021 3:47pm
Forum: EBike Build Threads
Topic: Converting my bike
Replies: 6
Views: 263

Re: Converting my bike

For that bike, I'd look at Bafang BBS01 or BBS02 (depending on how much power you want). Those are minimally invasive and don't pose much risk of damage to your frame.
by Chalo
Feb 10 2021 11:47pm
Forum: EBike General Discussion
Topic: Geared Hub Motor Quality
Replies: 66
Views: 2663

Re: Geared Hub Motor Quality

As far as I know, MAC/BMC are the highest power capable geared hub motors out there. eZee is robust, but less so than MAC.
by Chalo
Feb 09 2021 12:47pm
Forum: EBike Technical
Topic: USB fast-charger powered by e-bike battery
Replies: 7
Views: 141

Re: USB fast-charger powered by e-bike battery

I use one of these to power a chip-on-board LED that I use as a headlight: https://www.ebay.com/itm/124480545093 s-l400.jpg There's a trim pot that can be dialed to regulate output voltage from 4.5V to 30V. If all you want is 1 amp at 5 volts, and you don't need a hardware handshake, this thing shou...
by Chalo
Feb 09 2021 12:36pm
Forum: EBike Build Threads
Topic: My first ebike build: custom-built KMX-based electric velomobile
Replies: 11
Views: 460

Re: My first ebike build: custom-built KMX-based electric velomobile

I'm going to try that. I plan to do long-distance touring with this thing, regardless of whether I soon end up homeless or not, so keeping this thing reliable is of utmost importance. It is neither easy to carry nor inexpensive to tow or ship. Recumbents generally are a bear to push for any distanc...
by Chalo
Feb 09 2021 10:57am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1921
Views: 249796

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

I lost an axle nut today. I have the cassette version and while executing regen, an axle nut on the drive side came loose Yes, that's regenerative braking all right. There's an analogous problem with crank arm bolts on fixed gear bikes. Because torque can be transmitted both ways through a fixed ge...
by Chalo
Feb 09 2021 1:40am
Forum: EBike Technical
Topic: Do wire gauges add together for positive and negative wires?
Replies: 9
Views: 283

Re: Do wire gauges add together for positive and negative wires?

The voltage drop and power loss (heating) in a wire is a function of the square of the current, the gauge of the wire, and the length of the wire. Many times I've pointed out that the circuit board traces and FET legs of our controllers are many times smaller than the recommended gauge. But, they ar...
by Chalo
Feb 09 2021 1:29am
Forum: EBike Technical
Topic: is the motor I have comon in other kits?
Replies: 6
Views: 158

Re: is the motor I have comon in other kits?

If the sprockets don't lie in the same plane, the chain will tend to come off. The best thing you can do is to adjust everything so the sprockets are parallel and in line with each other.
by Chalo
Feb 09 2021 12:35am
Forum: EBike Technical
Topic: Battery cut off switch
Replies: 11
Views: 298

Re: Battery cut off switch

When the thing is used as a cutoff, which is to say not under load, then even a 12V rated switch will do. If you use it to quench a full power runaway condition, maybe it's better to consider it disposable like a fuse.
by Chalo
Feb 08 2021 9:46pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6565
Views: 531852

Re: new eZip motor

I have hardwired many wires with no problems at all using zero connectors. Often I'll do it with throttles but I have done it with phase wires leaving enough length to change a tire. Yeah... no. Servicing a bike when the wheel is on a leash, or swapping a busted throttle when it's soldered on, is n...