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by voicecoils
Jul 25 2015 6:13am
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?

For 400 pounds and 60mph, I'd be looking at motorcycle brakes. I agree. Even motorcycle brakes can struggle to cope with repeated acceleration/deceleration to 60 mph. It comes down to heat shedding capacity and if you ride in a way where you're building heat faster then it can be shed, you'll have ...
by voicecoils
Jul 20 2015 9:15am
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 reservoir?

The larger the rotor, the greater mechanical leverage you have but that becomes irrelevant if your pads overheat and glaze or brake fluid boils. So, the rotor and caliper both need to be to shed heat quickly & effectively to prevent that from happening. Magura & Shimano both have nice 4 piston brake...
by voicecoils
Jul 18 2015 9:47am
Forum: Items for Sale - New
Topic: CHEAP NEW ORIGINAL CELLS LI-ION 18650
Replies: 778
Views: 190614

Re: BRAND NEW CELLS 18650 LG/SAMSUNG/PANASONIC from 2,79$ EA

Was this just a miscommunication/misunderstanding about the meaning of "unwelded"? I think by that term, tumich is trying to say the cells have been physically separated from each other and are no longer welded together but not that they had never been tab welded to previously.
by voicecoils
Jul 11 2015 6:17am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1214
Views: 208450

Re: Compact Field Oriented Controller, ASI + Grin, limited r

voicecoils wrote:+1 phase runner
Can I also suggest the matching Blade Runner front? 8)
phase-runner.jpg
phase-runner.jpg (52.5 KiB) Viewed 2723 times
by voicecoils
Jul 10 2015 4:53pm
Forum: Battery Technology
Topic: Zero MX 2012 Battery Build
Replies: 11
Views: 777

Re: Zero MX 2012 Battery Build

You need to find out what voltage range the motor controller allows and what peak current the motor can handle. Also measure the dimensions of the battery box and calculate volume. With that info you can spec a pack with the correct working voltage, current handling and capacity to meet your needs f...
by voicecoils
Jul 07 2015 6:43am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4483
Views: 692817

Re: Pending P10 release and Teklektik's Involvement

justin_le wrote:So I would like to publicly say to Tek, huge thank you, and huge welcome, and I think all CA3 users should be relieved to see a dedicated developer on board.
Wow, that's awesome news! I think the future of the Cycle Analyst & it's support is bright :D
by voicecoils
Jul 07 2015 6:35am
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1233
Views: 213773

Re: Cheap BLDC controller, 200A, suitable for 96v 8000w moto

Samd wrote:
Hyena wrote: Hyena,

Welcome to Endless Sphere.....we over volt and over power everything. :lol: you are obviously a new guy!

Tom
Holy Frock. Did someone just pick Hyena for a noob?
WTF?
Image
by voicecoils
Jul 05 2015 4:50pm
Forum: EV Business World
Topic: French renewables power grid pilot shows limits of batteries
Replies: 3
Views: 1071

Re: French renewables power grid pilot shows limits of batte

That article is quite slanted against the use of renewables, stationary battery storage and distributed power even though it reads like a simple summary of results of the pilot project it describes. A shame but no surprise. They are comparing the cost of a small scale experimental renewable 'mini-gr...
by voicecoils
Jul 03 2015 6:26pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Added suspension, FS custom cruiser
Replies: 142
Views: 18029

Re: Added suspension, FS custom cruiser

Ouch, sorry to hear about the lipo fire.

I'm amazed it took out front wheel spokes!

Plans for a phoenix project?
by voicecoils
Jun 13 2015 1:15am
Forum: Electric Aircraft
Topic: Ten-engine electric plane completes successful flight test
Replies: 10
Views: 3216

Re: Ten-engine electric plane completes successful flight te

Hillhater wrote:Yep, spreading the loads,..
Both physical weight and thrust loads
Means you can have a lighter structure.
Only 4 motors on the Solar Impulse but same concept. Wider than a 747, lighter than many family cars (at 1,600kg):

Image
by voicecoils
Jun 12 2015 7:49pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: isle of man TT Zero
Replies: 29
Views: 4000

Re: isle of man TT Zero

Short on-board video of Mugen's 2015 race winning run released. Having front & rear cameras on screen is a nice improvement over last year. Wish they'd release the full lap though.

by voicecoils
Jun 12 2015 7:42pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: isle of man TT Zero
Replies: 29
Views: 4000

Re: isle of man TT Zero

Joseph C. wrote:6 minutes and about 7 seconds into that video - there is a fairly chilling tyre wobble too. :shock:
That's like a tickle compared to some of the superhuman saves pros pull off. Like this one :shock:

by voicecoils
Jun 11 2015 8:03pm
Forum: EV Business World
Topic: Investing in Tesla General Discussion Thread
Replies: 90
Views: 15553

Re: Investing in Tesla General Discussion Thread

A liquid cooled cable seems an odd thing to do... Perhaps at current application sizes it is inefficient and unneeded but if they scale it up to 200 or more kilowatts it starts to become important. I'd imagine there is all sorts of trade-offs involved vis-a-vis robotics versus liquid-cooling cables...
by voicecoils
Jun 11 2015 7:50pm
Forum: E-Bike General Discussion
Topic: The Køben - Kickstarter bike from Karmic Bikes
Replies: 9
Views: 1724

Re: The Køben - Kickstarter bike from Karmic Bikes

A bit strange that they go on about unsprung weight in the wheels and why you shouldn't fit a hub-motor there, then they put a 3kg Nuvinci in there that weighs more than many modern 250w hub-motors. I like the idea of the upgradeable battery. Does it use that clip-in cell holder system that we disc...
by voicecoils
Jun 11 2015 7:32am
Forum: Motor Technology
Topic: Is this Cromotor for real?
Replies: 23
Views: 4164

Re: Is this Cromotor for real?

Looks real to me. I've seen several versions of the Cromotor doing wheelbuilds for people. The hub is made in China, finished in Croatia as I understand. The Chinese factory makes this size motor for scooters and the Cromotor company gets a version produced that is spec'd to suit bicycle brakes and ...
by voicecoils
Jun 11 2015 4:22am
Forum: EV Business World
Topic: Investing in Tesla General Discussion Thread
Replies: 90
Views: 15553

Re: Investing in Tesla General Discussion Thread

Tesla are proposing to use liquid-cooled cables to reduce the thickness and prevent heat problems. They are already in use at the new mountain view supercharger. this should allow them to bump the power to beyond 135kw. they will still need to taper of course (with current packs) A liquid cooled ca...
by voicecoils
Jun 10 2015 10:23pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: isle of man TT Zero
Replies: 29
Views: 4000

Re: isle of man TT Zero

Here's McGuiness' winning run on the Mugen bike last year. It's in full, onboard camera and nice audio of the motor. vlxZs2-gICc The IoM TT is seriously extreme and routinely deadly. Probably on par with BASE jumping in deadliness & McGuiness is an outlier in having raced it so long without eliminat...
by voicecoils
Jun 10 2015 5:19am
Forum: E-Scooter and Motorcycle General Discussion
Topic: isle of man TT Zero
Replies: 29
Views: 4000

Re: isle of man TT Zero

Mugen wins the TT Zero again for 2015 with John McGuinness posting a lap of 119.279 mph average speed. Mugen's second rider was only 4 seconds behind and Brammo took out 3rd position with 111.620 mph average.
2015-TTZero.jpg
2015-TTZero.jpg (34.31 KiB) Viewed 3012 times
by voicecoils
Jun 09 2015 8:29pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: isle of man TT Zero
Replies: 29
Views: 4000

Re: isle of man TT Zero

That's a shame. It must have been interesting being involved with such a high-profile event :) That's the challenge of racing - everything on the bike has to be spot-on to do well. This year's TT Zero is about 8 hrs away. Ten riders are on the start list (attached) In yesterday's qualifying, one mo...
by voicecoils
Jun 09 2015 7:15pm
Forum: E-Bike General Discussion
Topic: The Køben - Kickstarter bike from Karmic Bikes
Replies: 9
Views: 1724

Re: The Køben - Kickstarter bike from Karmic Bikes

Just read that the rebuildable 18650 battery pack won't make their production bike. That's a disappointment as it was one of the only novel features on the bike. Neal Saiki (Zero Motorcycle's founder) was initially involved through his new company NTS Works, but no longer. NTS Works Has No Relations...
by voicecoils
Jun 09 2015 8:40am
Forum: E-Scooter and Motorcycle General Discussion
Topic: isle of man TT Zero
Replies: 29
Views: 4000

Re: isle of man TT Zero

Lightning did send a bike to the Isle in 2011 and 2012. I crewed for them in 2012. Johnny Burrows was the pilot both years. We were able to put a fast bike on the track but battery problems caused a DNF and DNS for official results. Apologies for my error, I'll edit the above. I didn't see them lis...
by voicecoils
Jun 09 2015 5:34am
Forum: E-Bike General Discussion
Topic: Commute - charge both at home and at work?
Replies: 20
Views: 1081

Re: Commute - charge both at home and at work?

If it is convenient to charge at work, I say do it. The bike will be quicker and zippier on the ride home then. It also means you can take longer side trips on the way home if the mood strikes. But, if charging at work is a pain and the bike can do the round trip easily then just charge at home, no ...
by voicecoils
Jun 09 2015 4:56am
Forum: E-Scooter and Motorcycle General Discussion
Topic: isle of man TT Zero
Replies: 29
Views: 4000

Re: isle of man TT Zero

Lightning didn't send a bike? I was hoping they would send one and smash the record but having an experienced competitive rider could be difficult to acquire. Apparently, it takes several years to learn the track well enough to be confident to go flat out round the course - it's that long. Lightnin...
by voicecoils
May 30 2015 3:39am
Forum: E-Bike Technical
Topic: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)
Replies: 2100
Views: 274083

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

Any lightweight (but strong) spokes to match the nipples? If choosing 2 ply tire, 1.4" wide rims, your custom nipples and hopefully lightweight alloy spokes the overall weight savings can easily be around 2 kilos +. And with all of that weight savings being farthest away from the hub it should real...