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by itchynackers
Apr 09, 2013 5:46 am
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 1982
Views: 255321

Re: Definitive Tests on the Heating and Cooling of Hub Motor

Great work Justin :D here's what i did, trying to exploite venturi effect and turbine effect. http://endless-sphere.com/forums/download/file.php?id=103524 Its not definitively tested yet though. ill have to hook up the thermistor to the ca and run tests with and without tape over the holes. Venturi...
by itchynackers
Apr 08, 2013 6:28 pm
Forum: E-Bike General Discussion
Topic: ADVICE - Puncture proof/Slick fast tyres ?
Replies: 27
Views: 2355

Re: ADVICE - Puncture proof/Slick fast tyres ?

I have over 16,000 miles on Michelin City Pilot tires with two total failures. One was from a box cutter blade, and one was from a large construction staple. My previous 2,000 miles were on other tires (including the lesser guarded Michelin City) which got thorn flats nearly 6x/year. With the City ...
by itchynackers
Apr 08, 2013 6:53 am
Forum: E-Bike General Discussion
Topic: 9c/HS35/X5 Norco 125 DJ 100v project
Replies: 244
Views: 24608

Re: 9c/HS35/X5 Norco 125 DJ 100v project

Check continuity from each wire (phase and hall) to your axle. This is how I found that I had a wire shorting to axle. I used the "diode" setting on the multimeter.
by itchynackers
Apr 07, 2013 7:16 am
Forum: Battery Technology
Topic: Hyperion 1420 charger Now declared officially Junk by me!
Replies: 101
Views: 3702

Re: Hyperion 1420 charger Now declared officially Junk by me

I use xt60's, xt150's, and I'd like to try the xt90's. I used 4mm bullets for a long time. I never had any problems, but they are just too long. Don't get me started on Andersons. Total crap. People keep saying "its the way you solder it", or "you don't know how to crimp it". This is total BS. There...
by itchynackers
Apr 07, 2013 6:48 am
Forum: General Discussion
Topic: Distance and charging battery cost ?
Replies: 14
Views: 638

Re: Distance and charging battery cost ?

For my electric bill to increase $30/month, I would need to ride 10,000miles at 20mph...per month. This is based on 0.15c/kwh rates. Lets see, 10000mi/20mph = 500 hours of riding.

500hrs/30 days = 16.7 hours riding per day.

That leaves 7.3 hrs for sleep.

Totally doable.
by itchynackers
Apr 07, 2013 6:37 am
Forum: Battery Technology
Topic: Hyperion 1420 charger Now declared officially Junk by me!
Replies: 101
Views: 3702

Re: Hyperion 1420 charger Now declared officially Junk by me

I've been using my 1420 for about 1.5 years without a problem. I even upgraded to 5.8 last fall with no problems. I also refuse to use Andersons anymore.
by itchynackers
Apr 05, 2013 2:54 pm
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 1982
Views: 255321

Re: Definitive Tests on the Heating and Cooling of Hub Motor

Like LFP said. The "wetted perimeter" of tiny holes is lots more than the "wetted perimeter" of larger hole(s). Therefore, the friction is much greater with tiny holes, resulting in much less flow. Try blowing air through your screen door.
by itchynackers
Apr 02, 2013 6:51 pm
Forum: General Discussion
Topic: Pikes Peak 2013
Replies: 9
Views: 609

Re: Pikes Peak 2013

Maybe an official Endless sphere event(s) is in order. We could have multiple events at the same venue/same day. How about: Top Speed Run Lap Races (of varying length) 1/8th mile timed run Marathon race (length to be determined) Maybe a "decathlon" style event with points awarded depending on your f...
by itchynackers
Mar 31, 2013 1:30 pm
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 1982
Views: 255321

Re: Definitive Tests on the Heating and Cooling of Hub Motor

Justin,
Can you make any recommendations yet as to whether using an internal temp probe/thermistor is an advantage over using the "hand method" on the covers? I'm pretty sure I know the answer, but coming from you would lend it more credibility.
by itchynackers
Mar 27, 2013 3:50 pm
Forum: Battery Technology
Topic: Hyperion 1420 charger Now declared officially Junk by me!
Replies: 101
Views: 3702

Re: I need help with a new Hyperion 1420 charger

If the pack voltage is too low, it may give an error. Try it at 11s, just to get the voltage up a bit, then try 12s.
by itchynackers
Mar 27, 2013 11:33 am
Forum: E-Bike Technical
Topic: Help programming a Lyen 18 fet 4115 controller
Replies: 33
Views: 3509

Re: Help programming a Lyen 18 fet 4115 controller

Wow, this is an old post. I was using a different motor then. The only issue I've had with the controller since 2011, is that (a month after my Pikes Peak ascent/descent) I discovered a cap was completely disconnected within the controller. I'm not sure if I rode up Pikes like that or not. So I reso...
by itchynackers
Mar 26, 2013 6:27 am
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 1982
Views: 255321

Re: Definitive Tests on the Heating and Cooling of Hub Motor

Wow, this is great. I'm really interested in the data on this, since I am using a 9c 10x6 with a temp probe at the windings! If it helps you any, I computed the volume within the motor in this thread about 2/3rds of the way down the page... I came out with 1300ml, so 650ml is fluid right to the axle...
by itchynackers
Mar 22, 2013 12:20 pm
Forum: E-Bike Technical
Topic: upgrading phase wires and hall wires
Replies: 12
Views: 1510

Re: upgrading phase wires and hall wires

When replacing phases, typically the hall wires will get destroyed. That is the only reason they get replaced. You will need to put in 2 extra wires for a temp sensor (total of 7 small wires and 3 large phase wires).
by itchynackers
Mar 13, 2013 5:10 pm
Forum: Items for Sale - New
Topic: Greyborg Cromotor Hubzilla (VERSION 2) w/ Temp Probe
Replies: 9
Views: 1799

Re: Greyborg Cromotor Hubzilla (VERSION 2) w/ Temp Probe

Mr. Methods,
What temp thermistor are you installing?

If I remove my 6x10 9c spokes from my existing wheel, are you saying they will fit the cromotor and same wheel?

Thanks,
Adam
by itchynackers
Mar 10, 2013 7:42 pm
Forum: E-Bike General Discussion
Topic: Where to buy 9C Motors
Replies: 43
Views: 1991

Re: Where to buy 9C Motors

You will need about 500 useable watt hours for 20 miles, and 750 for 30 miles. So assuming you will use 80% of a pack, then you need a 625wh pack, or a 937wh pack respectively.
by itchynackers
Mar 04, 2013 8:53 pm
Forum: E-Bike General Discussion
Topic: trek 3900
Replies: 8
Views: 551

Re: trek 3900

i think it is last years,it looks fairly new.it is the rim brake version.what do you mean hey to the cheeseheads i am in minn.we do not care for the cheeseheads. Not to worry: I have family from White Bear Lake, Minnesota. "Go Bears!" I'm more prone to follow agriculture than I am sports: http://ww...
by itchynackers
Mar 03, 2013 9:03 am
Forum: Items Wanted
Topic: 9C Hall sensors and small qty PTFE 28-30ga wire
Replies: 33
Views: 2992

Re: 9C Hall sensors and small qty PTFE 28-30ga wire

I've used Teflon wires in my motors for years and have never had a problem with "creep". In fact most motors come stock with Teflon wires. Likewise, I have run teflon wires for a few years for many thousands of miles and no problems (unlike standard insulation). I'm confused as to where the "load" ...
by itchynackers
Mar 03, 2013 8:52 am
Forum: E-Bike Technical
Topic: Technical Details on Methods 100V 300A Controllers
Replies: 16
Views: 2664

Re: Technical Details on Methods 100V 300A Controllers

Oooh cool! Any rough idea how much more efficient these may be?
by itchynackers
Feb 23, 2013 8:43 pm
Forum: E-Bike General Discussion
Topic: $1 emergency tire repair
Replies: 6
Views: 421

Re: $1 emergency tire repair

what about a piece of old underwear? Those suckers wear like iron, and cost less than a buck.
by itchynackers
Feb 23, 2013 3:04 pm
Forum: Items for Sale - New
Topic: Automatic brake light
Replies: 25
Views: 1626

Re: Automatic brake light

Just buy a bright brake light that blinks all the time. Easier, smaller, more durable, probably safer. Like I said, I have one, on a shelf collecting dust. It doesn't work that great.
by itchynackers
Feb 21, 2013 5:57 pm
Forum: Items for Sale - New
Topic: Automatic brake light
Replies: 25
Views: 1626

Re: Automatic brake light

I have one. Bought it last summer. It's a little clunky and big. Also, you have to set it juuuust right, or it doesn't work right. Even when it does, rough bumps will cause the clamp to slip, causing the light not to do what it is supposed to. I liked the idea, but ended up disappointed. It just sit...
by itchynackers
Feb 16, 2013 8:07 am
Forum: General Discussion
Topic: Car Goes Downwind 2.5 Times Faster Than the Wind
Replies: 268
Views: 18461

Re: Car Goes Downwind 2.5 Times Faster Than the Wind

I tried simplifying it for some people. Now others won't understand the way Beach described it. Apparently, it is too simple and too complex to understand.
by itchynackers
Feb 15, 2013 6:21 pm
Forum: E-Bike Technical
Topic: CA v3 first setup
Replies: 6
Views: 330

Re: CA v3 first setup

I would enter your shunt value, at a minimum, to control amps.
by itchynackers
Feb 15, 2013 5:30 pm
Forum: General Discussion
Topic: Car Goes Downwind 2.5 Times Faster Than the Wind
Replies: 268
Views: 18461

Re: Car Goes Downwind 2.5 Times Faster Than the Wind

It's not that hard. A balloon is powered by the wind, and can only be as fast as the wind. A wind vehicle in contact with the ground is powered by the wind AND the ground, and can move faster than the wind. And yet a vehicle powered only by the ground goes nowhere... :wink: Perhaps you're oversimpl...
by itchynackers
Feb 15, 2013 7:59 am
Forum: General Discussion
Topic: Car Goes Downwind 2.5 Times Faster Than the Wind
Replies: 268
Views: 18461

Re: Car Goes Downwind 2.5 Times Faster Than the Wind

It's not that hard. A balloon is powered by the wind, and can only be as fast as the wind. A wind vehicle in contact with the ground is powered by the wind AND the ground, and can move faster than the wind.