Search found 321 matches

by Altair
May 09 2020 6:29am
Forum: E-Bike Non-hub Motor Drives
Topic: Trial riders need their clutch?
Replies: 81
Views: 8656

Re: Trial riders need their clutch?

snip/ I expect you'll be impressed with what the trials bike will get you up and over that was previously difficult on go-fast bikes (enduro, MX, trail, even things like Sur Ron and LMX - all "go-fast" as far as I'm concerned). /snip I totally agree with that, and the fun part is that you can also ...
by Altair
Apr 26 2020 10:26am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

Pete said: "I love the idea that Altair has talked about of rolling backwards downhill while applying forward drive with throttle alone - that would be awesome, but I'm guessing it would be brutally hard on the motor?" No it's not, really. Not harder for the motor than holding still. And the current...
by Altair
Apr 15 2020 7:23am
Forum: E-Bike Build Threads / Photos & Video
Topic: Fat-e Trials Bike
Replies: 6
Views: 1229

Re: Fat-e Trials Bike

Pete, the shortest connectors I found, that have the highest current capacity, are the 8mm bullet connectors from Aliexpress. I insulate them with a piece of shrink tubing.
by Altair
Mar 28 2020 3:38pm
Forum: E-Bike Non-hub Motor Drives
Topic: Trial riders need their clutch?
Replies: 81
Views: 8656

Re: Trial riders need their clutch?

There are very nice trials shots here:
https://youtu.be/igacD4Jvh5E
by Altair
Mar 28 2020 3:32pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

Around 40Km/H maximum. The gearing is 96/11= 8.72:1
I wanted it to climb like a goat :)
by Altair
Mar 28 2020 10:43am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

I've decided to remove the AstroFlight motor and install the BHT that was in my first bike, in its place. That first bike has now been reconverted back to its former use, a standard pedal fatbike, and it saw good use in the last month, helping me regain some strength in the old legs. The motor subst...
by Altair
Mar 27 2020 9:01am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1307
Views: 139424

Re: Nucular electronics - complete kit for ev! [beta]

Bartosh wrote:
Mar 24 2020 5:17am
madin88 wrote:
Mar 24 2020 4:26am
How is phase current of Nuc definded, is it peak or RMS?
If it's rated for 500A RMS it would be 700A peak
while a 500A peak rating would be around 350A RMS
Peak, measured.

And, in the specification sheet from Nucular, are the currents stated as Short term Max or Continuous max ?
by Altair
Mar 12 2020 2:45pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1307
Views: 139424

Re: Nucular electronics - complete kit for ev! [beta]

Thanks Vasili!
Will the virus affect your parts supply for the April/May production?
by Altair
Mar 12 2020 11:11am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1307
Views: 139424

Re: Nucular electronics - complete kit for ev! [beta]

Hi Vasili, would there be a way in the Nuc to obtain a copy of one of the halls signals for use as a Tach signal in my setup? I presently use the Energus TinyBMS coupled with the EbikeAnalyser app on my phone that displays all the electrical parameters, including speed, based on the number of pulses...
by Altair
Feb 15 2020 8:28am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

Yes Pete, your calculations for speed were correct. The QS 90 70H with 10 poles has very probably 12 slots, which will give 60 steps per revolution. Not bad. But it is indeed long. BTW, the torque of a motor goes linearly with its length, but goes with the square of the diameter, so for the same vol...
by Altair
Feb 14 2020 9:06pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

That video cannot be called "trials", obviously. One thing to keep in mind is that you will never attain the theoretical no-load RPM on the bike. Today, it seems that all we see are low pole count motors, because theoretically you can go faster with them. But for trials, I would much prefer somethin...
by Altair
Feb 12 2020 9:02am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

This project looks real good! To limit costs and time, you could try it without the clutch first, you might actually like it, the acceleration is not bad at all. And it's adjustable through software anyway. And by going with suspension, you won't need the widest tires, so the limit of 4.5" won't be ...
by Altair
Feb 08 2020 1:39pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

I run the Kelly KLS-S which a sinewave controller. It can run the Astro pretty well but I'm not sure it would be useable with the usual motors. You might go with one of their other non-sinusoidal models instead. My KLS-S doesn't have the throttle delay defect, but I don't know which other one would ...
by Altair
Feb 07 2020 11:32pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

Rims! Like I said previously, they are Carbonfan 100mm from China, but I forgot to mention that they are tubeless, so no hassle with pinched tubes. The tires "pop" nicely onto the rims, and they allow you to run very low pressures without slipping on the rims. (And tearing the valves as on tubed tir...
by Altair
Feb 07 2020 11:22pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

Pete, I'm using a 1KWH pack and I'm good for 1½ hrs. Depending on your age and weight, I don't see anymore than that needed for a nice trials wring out. While checking out frames, be sure that they can take a 5.2" tire. There aren't many. Check RSD in Canada. BTW, I ride a Small frame. It's short, h...
by Altair
Feb 06 2020 1:07pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

Thanks Pete, I will answer your questions in the order they were asked. 1- The Nucular will certainly be a better option, I have one on order but still 2-3 months to be shipped. The Kelly KLS-S is a sinusoidal controller, and it does a good job on the Astro motor. Very smooth delivery, quiet, but is...
by Altair
Feb 05 2020 6:58pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

Now I would like to address many points that have been asked in this thread, or elsewhere. Regarding the use of a clutch, I agree that it is indispensable for a real trials bike, either I.C. or electric. However on a fatbike, I don't think it's necessary at all, if the controller allows full rated c...
by Altair
Feb 05 2020 6:57pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

Then last year I began building another one. It is based on an RSD frame, with a carbon fiber fork, also from RSD. This time I decided to go with an Astro Flight 3210 motor, coupled to a planetary gearbox of 5:1. Then a chain ratio of 8:1 to the rear wheel. The controller is a Kelly KLS-S. This setu...
by Altair
Feb 05 2020 6:49pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 98
Views: 6070

Re: Observed trials bike designing

Very interesting thread, guys! My post here will be a little off-topic from real trials bikes, but it will surely interest many of those who would like a bike suitable for "light-trials" riding. I've ridden trials bikes since I was 18, and sold my last one about 5 years ago when I passed the sixties...
by Altair
Jan 10 2020 5:55pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1307
Views: 139424

Re: Nucular electronics - complete kit for ev! [beta]

Thanks madin for the confirmation!
I don't need lots of current anyway, so I'm going with the 12F, which is already ordered.
by Altair
Jan 06 2020 5:40pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1307
Views: 139424

Re: Nucular electronics - complete kit for ev! [beta]

All Right, Lars!
Sorry for getting pumped-up :P
I'll delete my 2 useless posts.
by Altair
Jan 06 2020 3:10pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1307
Views: 139424

Re: Nucular electronics - complete kit for ev! [beta]

And to clarify further, I'll never be holding the bike stationary with WOT ! At the instant that the throttle is fully opened, brakes are off and I'm going. It's just that I want the same torque to the motor at zero RPM and at ANY other RPM, if I hold the throttle constant. (EDIT: Read that as: From...
by Altair
Jan 06 2020 2:54pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1307
Views: 139424

Re: Nucular electronics - complete kit for ev! [beta]

To clarify my concern about the "stalled-rotor current", I want to use a Fatbike as a light trials bike. I've been doing this for the last 3-4 years with my first build. When I have to climb a rock face with not much acceleration space at the bottom of it, that's where I need to be able to get an in...