Search found 701 matches

by fizzit
Sep 02 2019 7:29pm
Forum: E-Bike Non-hub Motor Drives
Topic: How good is Cyclone 4kw coaxial suspension bike?
Replies: 160
Views: 16749

Re: How good is Cyclone 4kw coaxial suspension bike?

Nice. They are quite competitive in weight if you keep the battery weight down to say 80 or 100 cells of 30q. You will find a wealth of information in this thread, in short, keep the RPM high and the torque low, use massive rear cogs to multiply the rpm back into wheel torque. There are a bunch of ...
by fizzit
Aug 30 2019 7:17pm
Forum: E-Bike Non-hub Motor Drives
Topic: How good is Cyclone 4kw coaxial suspension bike?
Replies: 160
Views: 16749

Re: How good is Cyclone 4kw coaxial suspension bike?

They respond several times a day through email. It takes a few days to prepare to ship and it is faster than usual from china. Is that the eeb frame or the steel one from this thread? Gotcha, hopefully they'll be in touch soon. I got the steel one, from my research it seems like it'll be lighter an...
by fizzit
Aug 30 2019 12:41am
Forum: E-Bike Non-hub Motor Drives
Topic: How good is Cyclone 4kw coaxial suspension bike?
Replies: 160
Views: 16749

Re: How good is Cyclone 4kw coaxial suspension bike?

I just ordered the 4.8kw Elite frame. Seems like a solid and hopefully reliable base for a fast bike. I ordered last Friday and haven't heard from them yet, hoping to receive within the next month or so. How long did they take to assemble/ship your frames? Do they use air mail?
by fizzit
Dec 03 2013 12:38pm
Forum: E-Bike Non-hub Motor Drives
Topic: RC mid-drive build from scratch. 80100, HV160, aim = 40mph+
Replies: 100
Views: 19397

Re: RC mid-drive build from scratch. 80100, HV160, aim = 40m

Very cool idea, current will need to be kept low to get 100-120 RPM cadence at crank from any Astro since they want to spin at 7500 RPM to be efficient (.93%). If I can be of assistance in design let me know, I do have a few Astro's on Hand, a used 3210 10T 135 kV, a brand new 3210 135 kV and a 322...
by fizzit
Nov 11 2013 2:53pm
Forum: E-Bike General Discussion
Topic: Electric Mountain Bikes – Friend or Foe (Article on MTBR)
Replies: 69
Views: 4798

Re: Electric Mountain Bikes – Friend or Foe (Article on MTBR

This situation quickly turned from an easy ride-in-the-woods to a life-and-death survival scenario that the e-bike rider is poorly equipped to handle
Apparently allowing people to ride ebikes on trails = trails littered with dead bodies of stranded riders :lol:
by fizzit
Oct 16 2013 4:16pm
Forum: Battery Technology
Topic: 24s BestechPower BMS Thread
Replies: 343
Views: 32447

Re: 24s BestechPower BMS Thread

Well... at least it was fun taking the pictures through the microscope :P
by fizzit
Oct 06 2013 8:39pm
Forum: Battery Technology
Topic: 24s BestechPower BMS Thread
Replies: 343
Views: 32447

Re: 24s BestechPower BMS Thread

Here is the 16S d167 that I bought from dnmun and then modified to work for 12s. http://i1018.photobucket.com/albums/af305/bananafred/IMAG0844_zpsc2cecf91.jpg I followed dnmun's advice to just lift the small resistor out of the way so it could be easily replaced. http://i1018.photobucket.com/albums/...
by fizzit
Oct 06 2013 1:38am
Forum: E-Bike Non-hub Motor Drives
Topic: Fizzit's RC freeride build log - now with videos
Replies: 229
Views: 36365

Re: Fizzit's RC freeride build log - now with videos

Don't worry, that was just for scale - the BMS isn't hooked up to anything yet. I will be putting it into a ventilated enclosure within the main box once I get it installed. I've been using rubber grommets for all the parts where the wires go through the metal box and that's worked pretty well so far.
by fizzit
Oct 05 2013 5:17pm
Forum: E-Bike Non-hub Motor Drives
Topic: Fizzit's RC freeride build log - now with videos
Replies: 229
Views: 36365

Re: Fizzit's RC freeride build log - now with videos

Well, I have been at college for the last month so I haven't been able to ride my bike or work on it at all. I hope to bring it over there soon, but first I need to make some updates to ensure that it's safe and reliable and ready for harsh weather conditions. I arrived home last night and was excit...
by fizzit
Oct 02 2013 6:02pm
Forum: E-Vehicles General Discussion
Topic: Model S Fire - Boeing sabotages Tesla
Replies: 61
Views: 8635

Re: Boeing sabotages Tesla

I guess that is one downside to having the batteries in the floor.
by fizzit
Sep 30 2013 8:45pm
Forum: Motor Technology
Topic: Induction Hub Motors
Replies: 11
Views: 1982

Re: Induction Hub Motors

Stevil_Knevil wrote:WOW :shock:

Got me thinking of an AC Induction, 2-speed geared hub motor..


..ouch 8)
That would be cool. The team is planning on going direct-drive, however. The rotor will also be the rim for the tire.
by fizzit
Sep 30 2013 7:06pm
Forum: Motor Technology
Topic: Induction Hub Motors
Replies: 11
Views: 1982

Re: Induction Hub Motors

Well I appreciate that you broke your rule! That is very interesting about the effect that it would have on handling. I guess I figured that unsprung mass wouldn't matter since the tracks are very smooth but I see that it has larger effects than just suspension response. I'm a freshman so I'm not go...
by fizzit
Sep 22 2013 5:22pm
Forum: General Discussion
Topic: looking for a good, free and easy to use 3D sketch program
Replies: 17
Views: 1795

Re: looking for a good, free and easy to use 3D sketch progr

It is very easy to make sketchup output stl's, all you have to do is download a free extension. It would be pretty useless otherwise.
by fizzit
Sep 22 2013 3:23am
Forum: General Discussion
Topic: looking for a good, free and easy to use 3D sketch program
Replies: 17
Views: 1795

Re: looking for a good, free and easy to use 3D sketch progr

I used solid works for a bit and it was awesome. Now I have to use sketch up. You can do most of the same things that you can do in solid works, it just takes more time.
by fizzit
Sep 20 2013 12:44pm
Forum: E-Bike General Discussion
Topic: eKMX Trike race against 600HP range rover
Replies: 27
Views: 2832

Re: eKMX Trike race against 600HP range rover

wojtek wrote: hub motor has advantage over RC drive as it is back heavy so better grip / traction.
:lol: yeah that's how it works...
by fizzit
Sep 19 2013 12:08pm
Forum: E-Vehicles General Discussion
Topic: Elon Musk's - Hyperloop
Replies: 131
Views: 17881

Re: Elon Musk's - Hyperloop

Punx0r wrote:pipe dream
Heh heh
by fizzit
Sep 16 2013 2:39pm
Forum: E-Vehicles General Discussion
Topic: Elon Musk's - Hyperloop
Replies: 131
Views: 17881

Re: Elon Musk's - Hyperloop

Speeding up and slowing down is not instantaneous. We did a calculation at work and at 0.5g acceleration it would take (if memory swerves me correctly) about 2.5 minutes to reach Mach 1.1 speed @ sea level. However that's not the control strategy; it's stair-stepped up and down at the end points. H...
by fizzit
Sep 13 2013 11:39pm
Forum: Motor Technology
Topic: Induction Hub Motors
Replies: 11
Views: 1982

Re: Induction Hub Motors

Thanks for the info, Liveforphysics. I am not entirely sure why they chose to go with induction over PM motors. Unfortunately there's no info yet about the project on the internet. I'm not sure which specific competition it is, but I know that there are multiple events: an endurance race, a drag rac...
by fizzit
Sep 13 2013 12:38am
Forum: Motor Technology
Topic: Induction Hub Motors
Replies: 11
Views: 1982

Induction Hub Motors

I just went to a meeting about the electric Formula car that the engineers at my university plan to build. They said that they plan to use induction hub motors (9 inch diameter) in all 4 wheels of the car, and the car will not have axles. They also said that having these motors would be far more eff...
by fizzit
Sep 08 2013 7:08pm
Forum: E-Bike General Discussion
Topic: Which 3D printer to make bike parts?
Replies: 30
Views: 1994

Re: 3D printer to make bike parts?

I have a 3d printer but I actually haven't found anything to do with my bike yet... A battery box would use a ton of plastic and take a huge printing envelope, but it's doable. Just make sure you get it right the first time :P And as for the rear rack extension, I'm not sure you'd be able to design ...
by fizzit
Sep 03 2013 2:27pm
Forum: General Discussion
Topic: North Americas most Electric Bicycle UNFRIENDLY City
Replies: 28
Views: 3526

Re: North Americas most Electric Bicycle UNFRIENDLY City

I'd guess that the most bike-unfriendly city in North America is probably somewhere in Mexico.
by fizzit
Sep 02 2013 3:03pm
Forum: General Discussion
Topic: chainlink removers, wat have you ??
Replies: 5
Views: 461

Re: chainlink removers, wat have you ??

I just use an angle grinder.
by fizzit
Aug 29 2013 11:28am
Forum: E-Bike General Discussion
Topic: Electric Mountain Bikes – Friend or Foe (Article on MTBR)
Replies: 69
Views: 4798

Re: Electric Mountain Bikes – Friend or Foe (Article on MTBR

The ones I primarily ride is shared with horses as well, so using some sort of weight regulation wouldn't make much sense for bicycles regardless of human or battery powered. i can live with that. ebike power is capped@one horse. then so should weight. what's equine top speed? 30mph? 35? lets push ...
by fizzit
Aug 29 2013 11:25am
Forum: General Discussion
Topic: Wake up at 3 a.m. & back door is open... someone broke in?
Replies: 34
Views: 3490

Re: Wake up at 3 a.m. & back door is open... someone broke i

I don't think that you create enough pointless threads...
by fizzit
Aug 13 2013 12:34am
Forum: E-Vehicles General Discussion
Topic: Elon Musk's - Hyperloop
Replies: 131
Views: 17881

Re: Elon Musk's - Hyperloop

Think capital costs. Think what it would cost to build that 10 meter tube. Miles and miles of tubes. Oh, I forgot, all the land is already taken. Think of the cost to buy new right of ways. The only "free" right of way is underground and in the air. Now add tunneling costs to the tube costs. I woul...