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by MadRhino
Jul 24 2020 9:52pm
Forum: E-Bike General Discussion
Topic: Mechanics in Seattle/Dropout Filing
Replies: 38
Views: 961

Re: Mechanics in Seattle/Dropout Filing

A torque arm is enough in many case, and better used alone. I mean, it is very likely that a double torque arms installation has a slight difference of alignment, simply because it is difficult to attach them to the frame with reliable precision. Thus torque is applied to one of them first and force...
by MadRhino
Jul 24 2020 7:58pm
Forum: E-Bike General Discussion
Topic: Mechanics in Seattle/Dropout Filing
Replies: 38
Views: 961

Re: Mechanics in Seattle/Dropout Filing

That is very strong, stronger that I usually make but, you know you need to make both sides, right? Otherwise, you risk axle twisting and eventually, wheel misalignment due to the weakness of the other side. Well, depending of the power of course. That is how I like to do. Lighter (1/4’’ thick), wit...
by MadRhino
Jul 23 2020 10:11pm
Forum: E-Bike General Discussion
Topic: Busted a bike
Replies: 34
Views: 1070

Re: Busted a bike

i like gold, spent quite a few years mining. if youre in gold country people prefer gold over cash... Keeping some gold for the bad days is a wise habit. This bad year especially, is going to triple the price we paid for it. :D Then buy some land, that is much safer and profitable than any bank. A ...
by MadRhino
Jul 23 2020 9:53pm
Forum: E-Bike General Discussion
Topic: Why fat tires on a street ebike?
Replies: 81
Views: 2255

Re: Why fat tires on a street ebike?

I wouldn’t ride a Schwaalbe Marathon if it was the only tire available. They are freaking dangerous on a fast bike because of their hard gum that is closer to nylon than rubber. There are good bicycle tires, as well as bad motorcycle tires. And many bicycle tires have better grip than most motorcycl...
by MadRhino
Jul 23 2020 8:30pm
Forum: E-Bike General Discussion
Topic: I need help, as i dont have anywhere to ask, and no one to help me
Replies: 146
Views: 3584

Re: I need help, as i dont have anywhere to ask, and no one to help me

E-HP wrote:
Jul 23 2020 8:25pm

Ahhh thanks. That makes sense. :thumb:
Especially when working with electricity. :D
by MadRhino
Jul 23 2020 8:21pm
Forum: E-Bike General Discussion
Topic: Why fat tires on a street ebike?
Replies: 81
Views: 2255

Re: Why fat tires on a street ebike?

Going fast, need motorcycle/moped grade tires and rims and enough power to throttle past the flakes I have heard this myth before. The downhill world record is 227 kmh down a rocky volcano, on bicycle tires. I never ride more than half of that in town. The only time in my life that I have had a tir...
by MadRhino
Jul 23 2020 8:01pm
Forum: E-Bike General Discussion
Topic: I need help, as i dont have anywhere to ask, and no one to help me
Replies: 146
Views: 3584

Re: I need help, as i dont have anywhere to ask, and no one to help me

E-HP wrote:
Jul 23 2020 7:54pm
OK, I guess I'm the only one that doesn't know that "wolt" means. Can someone help?
Work
by MadRhino
Jul 23 2020 7:52pm
Forum: E-Bike General Discussion
Topic: Busted a bike
Replies: 34
Views: 1070

Re: Busted a bike

There is a coin shortage, people arent going to stores as they used to and when they do they use tap and pay credit/debit cards. https://www.youtube.com/watch?v=0bY5ziy2XDE Funny This won’t happen to me. I never used credit in my entire life. I don’t even do business at all with banks. My grandfath...
by MadRhino
Jul 23 2020 6:21pm
Forum: E-Bike General Discussion
Topic: I need help, as i dont have anywhere to ask, and no one to help me
Replies: 146
Views: 3584

Re: I need help, as i dont have anywhere to ask, and no one to help me

Well, it is Chinese. Even some screws from China are not Metric, neither Imperial, they are... Chinese. :mrgreen:

I was born a farmer, studied veterinary med, and worked all my life building stone masonry. Ebikes was something I had to learn when I started building my first.
by MadRhino
Jul 23 2020 6:01pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 576

Re: High torque motor at 0rpm (stalled)

The small motor of your power steering system is governed by a controller that feeds it the power required by the signal. When it is not spinning, it is not stalled, but stopped by the controller that is not feeding it anymore.
by MadRhino
Jul 23 2020 5:52pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 576

Re: High torque motor at 0rpm (stalled)

So, without weights how is it that the user will be able to generate electricity via a motor while maintaining the feel of say 200 pounds worth of weight? I don't see how this is possible. You adjust the restriction via Amp demand to the motor, just like regen braking. The force deployed by the use...
by MadRhino
Jul 23 2020 2:27pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 576

Re: High torque motor at 0rpm (stalled)

The only good reason to use a motor for the purpose of a workout machine, is to convert the energy deployed by the user of the machine, to produce electricity. :D
by MadRhino
Jul 23 2020 2:23pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 576

Re: High torque motor at 0rpm (stalled)

This is true and practical with any other force. Most of workout machines are working against the force of gravity. Some even use magnetic force already. Some are using force of inertia, etc..
by MadRhino
Jul 23 2020 2:17pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 576

Re: High torque motor at 0rpm (stalled)

A hint?
The magnets don’t have to be fixed. They can be moved with the action of the machine, and the distance of other magnets or ferrous metal can be adjusted to create and vary a linear or progressive resistance to movement.
by MadRhino
Jul 23 2020 2:04pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 576

Re: High torque motor at 0rpm (stalled)

An electric motor does convert energy to force and movement, and its efficiency determines a part of energy that is lost (converted to heat). If there is no movement it does convert energy to force only, very inefficiently thus most of the energy is converted to heat. The movement and force of a mot...
by MadRhino
Jul 23 2020 12:34pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 576

Re: High torque motor at 0rpm (stalled)

You mean you plan to workout against the motor and never let it spin? No way. You need the differential and gears because a motor need to spin, otherwise it is only building heat. There are ways to avoid the differential and gears yet letting the motor spin, but no way you can keep it stalled. And, ...
by MadRhino
Jul 23 2020 12:11pm
Forum: E-Bike General Discussion
Topic: Why fat tires on a street ebike?
Replies: 81
Views: 2255

Re: Why fat tires on a street ebike?

Handling can’t be judged in a straight line. It is in aggressive maneuvers and fast turns that a bike’s handling shows. Then, tires are not the only factor. Suspension tuning and geometry are for a big part of handling quality of a bike. Tune the best with the wheels that you have, then you will no...
by MadRhino
Jul 23 2020 10:39am
Forum: E-Bike General Discussion
Topic: Newb questions about 1st ebike build ??
Replies: 34
Views: 725

Re: Newb questions about 1st ebike build ??

Yep, and every build suits someone's requirements.
by MadRhino
Jul 23 2020 9:07am
Forum: E-Bike General Discussion
Topic: Newb questions about 1st ebike build ??
Replies: 34
Views: 725

Re: Newb questions about 1st ebike build ??

forcefed wrote:
Jul 23 2020 9:01am

I can't imagine doing throttle only with a 3kw cyclone, a bit too much twist and you're flying lol
Maybe you feel that you are more precise with your feet?

3kw is lame for many here, who would not even think about controlling the power of their bike with PAS.
by MadRhino
Jul 23 2020 8:52am
Forum: E-Bike General Discussion
Topic: Busted a bike
Replies: 34
Views: 1070

Re: Busted a bike

Your grand children will continue to pay for it. We have way too many crooks stashing profits from future generations debt.
by MadRhino
Jul 23 2020 8:34am
Forum: E-Bike General Discussion
Topic: Newb questions about 1st ebike build ??
Replies: 34
Views: 725

Re: Newb questions about 1st ebike build ??

Here's a good explanation why you need brake sensors on trails, not sure how much of delay the bafang has but every split second counts on trails https://www.youtube.com/watch?v=7EFM3zOpEMs&feature=youtu.be&t=549 That looks like a better argument for throttle-only operation on trails. Yep. Throttle...
by MadRhino
Jul 23 2020 8:17am
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 576

Re: High torque motor at 0rpm (stalled)

My point is, bad or misleading information is often worse than none. It is only simple truth. A search will give you choice of building threads for a fast and powerful bike, even if you are here 5 minutes. The ‘newb’ is asking if high torque is possible. I simply answer it is with a big DD hub, whi...
by MadRhino
Jul 23 2020 7:48am
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 576

Re: High torque motor at 0rpm (stalled)

You would need a thousand pound and a freaking steep slope to stall a big DD hub fed 20 kw. : Mine digs the ground throwing 4 inch rocks 50 ft behind, then spins off its tire when I try climbing too steep. :twisted: Maybe some details about the bike you are thinking of, with some details regarding ...
by MadRhino
Jul 23 2020 7:39am
Forum: E-Bike General Discussion
Topic: I need help, as i dont have anywhere to ask, and no one to help me
Replies: 146
Views: 3584

Re: I need help, as i dont have anywhere to ask, and no one to help me

Someone else will make a washer.., A new kit.., For damaged insulation and the usual fitting problems? There is only one solution. You should walk, or buy a bike already built with a guarantee. A new kit will not make any difference. It will only require different fitting work, and you just don’t wa...
by MadRhino
Jul 23 2020 1:34am
Forum: E-Bike General Discussion
Topic: Crystalyte SAW and MSOFP16 geared motor questions
Replies: 4
Views: 162

Re: Crystalyte SAW and MSOFP16 geared motor questions

...How badly have I damaged it Only cooked a bit of varnish. If it was badly damaged it wouldn’t run anymore. 800w is a lot for this small motor. It will probably last many more years if you keep limiting to 500w. DD hubs can survive a lot of abuse. The geared hub will give you better torque, and m...