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by voicecoils
Sep 22 2015 5:34am
Forum: E-Bike Technical
Topic: pre stressing spokes
Replies: 21
Views: 1581

Re: pre stressing spokes

999zip999 wrote:Pre stress or stress spokes. Before or after and how is this performed. What's are these secrets ?
This is the best article I've read on the topic: http://www.wheelfanatyk.com/blog/wheel- ... our-wheel/

It's fairly short and worth the read.
by voicecoils
Sep 20 2015 6:53am
Forum: E-Bike Non-hub Motor Drives
Topic: HPC Revolution XXX
Replies: 348
Views: 50456

Re: HPC Revolution XXX

torque handling of the freewheel is one part, the other part is the torque handling of the spokes and spokeflange. the larger the spoke flange diameter the lower the stress. i have seen such oversized hub that had about 100mm diameter, but unfortunately i cannot find it anymore Chub Hub perhaps? ht...
by voicecoils
Sep 19 2015 7:42pm
Forum: E-Bike Technical
Topic: pre stressing spokes
Replies: 21
Views: 1581

Re: pre stressing spokes

Why do I get the feeling ill be adjusting the radial only to find ive put the lateral out , then the lateral to find the radial will be out ,,,could be never ending , unless I fluke it ! Yep, wheel building is completely iterative. You make changes to radial, lateral, tension & dish then check your...
by voicecoils
Sep 19 2015 4:42pm
Forum: E-Bike Technical
Topic: pre stressing spokes
Replies: 21
Views: 1581

Re: pre stressing spokes

Lateral true = side to side wobble Radial true = how round the wheel is It sounds like you need to work on radial truing. With radial truing remember that you can't keep working around the wheel tightening spokes indefinitely trying to achieve roundness. At some point you reach max tension and if th...
by voicecoils
Sep 18 2015 6:02am
Forum: E-Bike Technical
Topic: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)
Replies: 2100
Views: 274098

Re: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tir

No laughing here. It's true, you can get away just with a few pencils and rubber bands like Rix showed.

Dedicated truing stands help speed things up and let you swap from one wheel to the next quickly but are not a requirement for the casual wheelbuilder. Unless you like expensive tools :D
by voicecoils
Sep 16 2015 4:52pm
Forum: E-Bike Technical
Topic: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)
Replies: 2100
Views: 274098

Re: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tir

You guys are killing me, :mrgreen: :lol: I am half tempted to make a video about wheel builds, but then a true wheel smith like Voice Coils or JR Holmes would see my shit and wonder how it holds up. That's part of the beauty of these 1-cross moped wheel builds: provided you get enough tension into ...
by voicecoils
Sep 11 2015 6:39am
Forum: E-Bike Technical
Topic: Avanti Electra axial flux hubmotor - just for fun
Replies: 12
Views: 2271

Re: Avanti Electra axial flux hubmotor - just for fun

Voicecoils, have you any updates on testing this motor? I have acquired the same hub motor/wheel also with a blown controller. I am about to start testing it with a VESC controller. No, it was on loan (I'd hoped somewhat permanently :lol: ) but the owner asked for it back. Additional thoughts: 24-3...
by voicecoils
Aug 31 2015 10:23am
Forum: E-Bike General Discussion
Topic: Endless Sphere Podcast
Replies: 57
Views: 3251

Re: Endless Sphere Podcast

Nice work Ice!

Everyone learns in different ways so podcasts can help add another dimension for better understanding.

I had a short listen & think your podcast voice & presentation is good - clear and easily understood.

Hope you keep making them!
by voicecoils
Aug 14 2015 11:12pm
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16521
Views: 1616369

Re: E-S Stealth Electric Bike Owners

Hope the bike gets recovered QMS !! In fact when the coils can't make the extra power into magnetic field, it's forced to make it into radically more heat. A cooling system can carry it away to stop the motor burning out, but you don't get a chance for that extra kinetic energy out of the back end o...
by voicecoils
Aug 11 2015 7:42am
Forum: E-Bike Build Threads / Photos & Video
Topic: Welcome to the Electric Horsemen
Replies: 84
Views: 11984

Re: Welcome to the Electric Horsemen

That's a fantastic stable of electric steeds.

If you can get any one of them registered with pedals as a class LA vehicle under the ADRs I'll be delighted to hear and interested to follow suit.
by voicecoils
Aug 11 2015 7:34am
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16521
Views: 1616369

Re: E-S Stealth Electric Bike Owners

Scary stuff Dunk.

Most ebikes are using a hall effect throttle. The sensor inside is very small with 3 tiny legs right next to each other which if bridged by moisture can put you in a full throttle or no throttle situation.
by voicecoils
Aug 10 2015 7:21am
Forum: E-Bike Non-hub Motor Drives
Topic: Small Hi-power bike Concept, reality?
Replies: 64
Views: 32370

Re: Small Hi-power bike Concept, reality?

The quality of your renders are great. You should try to mount your motor so the output shaft is in the same plane as the wheel. The transverse motor mounting you've shown reduces efficiency and increases noise unnecessarily. Harley did that on purpose for their electric motorcycle prototypes just t...
by voicecoils
Aug 09 2015 9:06am
Forum: General Discussion
Topic: !!!!Site Shutdown for Migration (Success)!!!
Replies: 25
Views: 1713

Re: !!!!Site Shutdown for Migration (Success)!!!

I'm seeing far faster speeds using E-S here in Oz. The difference was instantly noticeable.

Thanks for the awesome work Team Migration!
by voicecoils
Aug 09 2015 6:17am
Forum: E-Bike Build Threads / Photos & Video
Topic: Stealth FUTR owners builds and pics
Replies: 2278
Views: 165704

Re: Flux owners builds and pics

Might have to go the radial laced 24" 50mm or 75mm wide rim with Berm Masters. Don't really want to run 80v 80a into a radial lacing. Ha. I should never have said 'last post' above. Have you considered doing a paired hole radial lace? ebikes.ca spoke calculator makes it easy to model and you can se...
by voicecoils
Aug 09 2015 5:09am
Forum: E-Bike Build Threads / Photos & Video
Topic: Stealth FUTR owners builds and pics
Replies: 2278
Views: 165704

Re: Flux owners builds and pics

Last comment from me tonight. Anyone planning to run a singlespeed drivetrain and thinking about chain tensioners due to the vertical dropouts, it's worth remembering that the bottom bracket is on the swingarm so the the chainlength will not change throughout the suspension travel. So, you don't nee...
by voicecoils
Aug 09 2015 4:56am
Forum: E-Bike Build Threads / Photos & Video
Topic: Stealth FUTR owners builds and pics
Replies: 2278
Views: 165704

Re: Flux owners builds and pics

That looks really awesome with the 3.00-17 SR241 front and rear. I mean really tough. You got me rethinking my wheel choice. Dam it Rod, I had it all figured out....until now. Yeah, that's a nice setup. * big shock with 3" stroke - good for handling the hubmotor weight without packing it in * 17" m...
by voicecoils
Aug 09 2015 4:41am
Forum: E-Bike Build Threads / Photos & Video
Topic: Stealth FUTR owners builds and pics
Replies: 2278
Views: 165704

Re: Flux owners builds and pics

Thx for the thread! About the rear iso brake points, does every rotor fit even when you cannot slide to adjust? For each size rotor, you'll need the matching brake adaptor. The swingarm uses a common mount called the IS side mount or tab mount. http://blog.artscyclery.com/wp-content/uploads/2014/12...
by voicecoils
Aug 08 2015 12:17am
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16521
Views: 1616369

Re: E-S Stealth Electric Bike Owners

Ouch Jay, Ouch: Phwoar, tore his balls off :shock: Brutal. You're getting off light my friend :lol: ... Keeping a motor cool will allow you to run it out side it's efficiency zone for longer, giving that extra torque that us side cover drilling hotrodders crave but it's the well documented story of...
by voicecoils
Aug 07 2015 4:33am
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16521
Views: 1616369

Re: E-S Stealth Electric Bike Owners

If you could pump liquid nitrogen through a 250W hub motor, I'm sure you could squeeze 2-3KW+ out of it no worries. Just look at what's possible on CPU's overclocked on LN2. Not necessarily. It depends at what point the motor saturates. Cooling buys you time but it doesn't change the max torque ( a...
by voicecoils
Aug 05 2015 6:18am
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16521
Views: 1616369

Re: E-S Stealth Electric Bike Owners

Kepler wrote:"Heavens" Now that's a bit strong voicecoils. This is a family forum you know.
In hindsight I should have said strewth!. Especially since I'm now an Aussie citizen.
by voicecoils
Aug 05 2015 4:40am
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16521
Views: 1616369

Re: E-S Stealth Electric Bike Owners

Heavens.

Why not just make up a set of clamping dropout plates CD that slide into the swingarm dropout slots? Then you don't need axle nuts at all. Much easier than trying to DIY an axle press.
by voicecoils
Jul 31 2015 6:01pm
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16521
Views: 1616369

Re: E-S Stealth Electric Bike Owners

Also if anyone has got hope tech brakes Mine had excessive travel at the leaver done the bleeding thing, so then i tryed the pad alignment vid on YouTube Well what a difference nice leaver modulation the pads are now closer to discs so if anyone has them or other brake with crap leaver mybe this wo...
by voicecoils
Jul 29 2015 7:24am
Forum: E-Bike Technical
Topic: What makes good brakes? Pistons, rotor or feedback?
Replies: 52
Views: 4452

Re: What makes good brakes? Pistons, rotor or feedback?

Yeah, it surprised me too when I discovered it. At that time (early 1960s), motor racers were as stuck on all-leading-shoe drums as they are on hydraulic discs today. I think perimeter disks brakes are as close to rim brakes as you'll see on motorbikes again. http://image.motorcyclistonline.com/f/n...
by voicecoils
Jul 26 2015 11:27pm
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16521
Views: 1616369

Re: E-S Stealth Electric Bike Owners

All that being said, where can I get just the insert? I saw that its included with Magura's Pro Mechanics kit, but I don't need all of that other shit to bleed brakes at the home shop level. Magura calls it the "transport devices" and it serves dual purpose of keeping pads apart for transport or fl...
by voicecoils
Jul 25 2015 7:18pm
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16521
Views: 1616369

Re: E-S Stealth Electric Bike Owners

As far as lever travel goes, try bleeding your brakes. Its possible you got an air bubble in the line. That will make the lever travel a bit, and feel spongy doing it. Good suggestion - trying to remove air bubbles. Another tip that improves lever travel is to use a thinner block between the piston...