Search found 719 matches

by Stevil_Knevil
Dec 17 2014 5:45pm
Forum: E-Bike Technical
Topic: Science, Physics, Math, & Myth
Replies: 626
Views: 58684

Re: Science, Physics, Math, & Myth

Can we all agree on what 'apples' are, please? -Battery :arrow: 66V 4.6Ah Dewalt -Controller :arrow: 40A IRFB4110 -Wheel diameter :arrow: 23.5" OK, good. Let's put these on our test bench. Aside from the enable switch and throttle (100%), we will NOT touch anything except for the phase and hall conn...
by Stevil_Knevil
Dec 13 2014 7:53pm
Forum: E-Bike Technical
Topic: muxus 3000 chugging ?
Replies: 138
Views: 11973

Re: muxus 3000 chugging ?

999zip999 wrote:..or short in the motor..


Zip, If you have not already - NOW might be a good time to pull the wire-side motor cover and confirm there are no abrasions in the wires' insulation where they exit..
by Stevil_Knevil
Dec 11 2014 2:31am
Forum: E-Bike Technical
Topic: muxus 3000 chugging ?
Replies: 138
Views: 11973

Re: muxus 3000 chattering ?

the controller test showed 2 twin sets of leds one time around then stopped. I did the Jaterureka fet test, as probe for resistance between all controller phases and pos. B&G 10.42k Y 10.38k Then all three and neg. All 10.40k. Is this the problem ? Sounds like a controller issue ..might have been d...
by Stevil_Knevil
Dec 10 2014 6:58pm
Forum: E-Bike Build Threads / Photos & Video
Topic: SEXY E-BIKES WITH MOTO WHEELS SHOWOFF THREAD
Replies: 103
Views: 18548

Re: SEXY E-BIKES WITH MOTO WHEELS SHOWOFF THREAD

17" moto wheels wrapped with Michelin Gazelles ..2.50" front and 3.00" rear.. http://www.endless-sphere.com/forums/download/file.php?id=80919 http://www.endless-sphere.com/forums/download/file.php?id=80428&t=1 https://lh6.googleusercontent.com/-RyzgvSsmsFI/T4I5MoklrkI/AAAAAAAAFaA/1IIaiaKB2FI/s640/DS...
by Stevil_Knevil
Dec 10 2014 1:59am
Forum: E-Bike Technical
Topic: Newbie's project idea: 2 motors on my commuter MTB.
Replies: 68
Views: 3592

Re: Help me pick the best motor/controller/battery for my fr

erik_m wrote:
Stevil_Knevil wrote:P.S. I LOVE eBiking the Joe Rodota trail, too!
I call it the Joe Ro-homeless Trail
Kind of a crass statement ...but I get it.

Have a eFatBike if you are interested to see how they ride. It is out here in SebTown.
by Stevil_Knevil
Dec 08 2014 6:22pm
Forum: E-Bike Technical
Topic: Newbie's project idea: 2 motors on my commuter MTB.
Replies: 68
Views: 3592

Re: Help me pick the best motor/controller/battery for my fr

An observation - if you go with a rear hub and retain the pedals, 16T is the smallest (tallest gear) freewheel that will thread onto it. There were a couple of 15t freewheels for normal 1.37"-24 threads. They are hard to find. More likely with a fatbike, because the chainline is already pushed outw...
by Stevil_Knevil
Dec 08 2014 6:03pm
Forum: E-Bike Technical
Topic: MXUS 3000 Hub Motor - V1 V2 V3
Replies: 1886
Views: 54350

Re: MXUS 3000 Hub Motor

So, more copper fill on the higher wind motor ..nice! Did you spec that, or is this standard winding practice on the 3kW MXUS V2? Aside from a few stray/loose windings at 3 and 9 o'clock, this looks like one of the best 'Straight Outta' China' wheel builds I have ever seen. Were you pleased with the...
by Stevil_Knevil
Dec 08 2014 4:22pm
Forum: E-Bike Technical
Topic: Newbie's project idea: 2 motors on my commuter MTB.
Replies: 68
Views: 3592

Re: Help me pick the best motor/controller/battery for my fr

Can't see the frame from your eBay link -- because you scored it :D Couple questions- Are your dropouts horizontal or vertical (your pics show both versions) ? Are you getting a frameset, ie. frame and fork? *EDIT* Derp! Scrolled down your eBay link to see - vertical drops, no fork :oops: An observa...
by Stevil_Knevil
Dec 04 2014 5:05am
Forum: E-Bike Technical
Topic: Science, Physics, Math, & Myth
Replies: 626
Views: 58684

Re: Science, Physics, Math, & Myth

litespeed wrote:
Rix wrote:
liveforphysics wrote:I am so excited to see questions being answered correctly now. :-)

You guys make me so proud!!
I feel like grasshopper to the mighty Shaolin Preist on this thread.
"Try to fetch the pebble from my hand, grasshopper!"
I feel like someone is constantly moving the chairs around.
by Stevil_Knevil
Dec 03 2014 2:17pm
Forum: E-Bike Technical
Topic: Science, Physics, Math, & Myth
Replies: 626
Views: 58684

Re: Science, Physics, Math, & Myth

John, I fully appreciate your tenacity regarding 'The Myth'. I really do get 'It'.. ..but.. ..I would like to call your attention to the benefits of a higher voltage, lower current battery pack required to get the same work done with high turn count motors -> Our packs need to give MUCH less (20-50%...
by Stevil_Knevil
Dec 02 2014 11:42pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Short Harley LiveWire Test Drive-Plus Test Drive Signup!
Replies: 2
Views: 697

Re: Short Harley LiveWire Test Drive-Plus Test Drive Signup!

Wonder if HD will include a sound device to alert other drivers and pedestrians to it's presence at lower (parking lot) speeds? Think of the "pototoe potatoe potatoe" sound signature that they tried -unsuccessfully- to patent. Reminded of a device that would insert a random pop and misfire on the ne...
by Stevil_Knevil
Dec 02 2014 11:09pm
Forum: E-Bike Technical
Topic: MXUS 3000 Hub Motor - V1 V2 V3
Replies: 1886
Views: 54350

Re: MXUS 3000 Hub Motor

KF's first post also included a quote from John in CR.

Much respect for all of Y'all, but I saw BS dropping from somewhere further South :roll:
by Stevil_Knevil
Dec 02 2014 3:35pm
Forum: Items for Sale - New
Topic: MXUS 45mm 3000W Motor Winding & Rim Options
Replies: 30
Views: 6218

Re: MXUS 45mm 3000W Motor Winding & Rim Options

+1 for higher wind hub motors in 17" moto rims. Ride the myth :wink: Haha, I went the myth route myself! Who'd have known? I loved the way my 4065 in a 26" rim.....off road and almost never got hot at 65 amps and 24s! Stupid axle!!! 6T with a 17" rim because I couldnt get an 18" I'll either run it ...
by Stevil_Knevil
Dec 02 2014 3:19pm
Forum: Items for Sale - New
Topic: MXUS 45mm 3000W Motor Winding & Rim Options
Replies: 30
Views: 6218

Re: MXUS 45mm 3000W Motor Winding & Rim Options

Add to the Survey: Regarding Moped Rims: Would you rather have 7075 Aluminum or 6061-T6 Aluminum if it mean a cost increase of ~$30 per rim for the 7075 Alloy? Great question! A T6 moto wheel that is ~3/16" thick should have somewhere in the neighborhood of +/- 37,000 PSI yield strength, right? See...
by Stevil_Knevil
Nov 25 2014 3:28pm
Forum: Items for Sale - New
Topic: MXUS 45mm 3000W Motor Winding & Rim Options
Replies: 30
Views: 6218

Re: MXUS 45mm 3000W Motor Winding & Rim Options

I voted for #4 - because it apparently comes with a magical wand that dispels myths :lol: :lol: :lol:
by Stevil_Knevil
Nov 25 2014 1:27am
Forum: E-Bike Technical
Topic: Science, Physics, Math, & Myth
Replies: 626
Views: 58684

Re: Science, Physics, Math, & Myth

Great discussion!

Higher wind count motors exist for good reasons ..I see no myth there.

Volt up, gear down.
Simple.
by Stevil_Knevil
Nov 25 2014 12:59am
Forum: Items for Sale - New
Topic: MXUS 45mm 3000W Motor Winding & Rim Options
Replies: 30
Views: 6218

Re: MXUS 45mm 3000W Motor Winding & Rim Options

+1 for higher wind hub motors in 17" moto rims.

Ride the myth :wink:
by Stevil_Knevil
Nov 21 2014 4:32am
Forum: E-Bike Technical
Topic: MXUS 3000 Hub Motor - V1 V2 V3
Replies: 1886
Views: 54350

Re: MXUS 3000 Hub Motor

Another good argument for volting up, and gearing down -> half the amps required for -essentially- the same, high performance machine. Holistically speaking, the batteries only need to give half of the discharge rate = cooler, longer lasting batteries. Given the variety of high voltage capable contr...
by Stevil_Knevil
Nov 18 2014 4:45pm
Forum: E-Bike General Discussion
Topic: Difference between the MXUS 3000W - V2 - 4Tx16 and 5Tx12?
Replies: 38
Views: 4317

Re: Difference between the MXUS 3000W - V2 - 4Tx16 and 5Tx12

Pretty sure electrons flow around conductors, not through.

Is that a myth?
by Stevil_Knevil
Nov 18 2014 4:22pm
Forum: E-Bike Technical
Topic: MXUS 3000 Hub Motor - V1 V2 V3
Replies: 1886
Views: 54350

Re: MXUS 3000 Hub Motor

Yay math!

Geeks rule.
by Stevil_Knevil
Nov 18 2014 3:35pm
Forum: E-Bike General Discussion
Topic: Difference between the MXUS 3000W - V2 - 4Tx16 and 5Tx12?
Replies: 38
Views: 4317

Re: Difference between the MXUS 3000W - V2 - 4Tx16 and 5Tx12

With 15% more torque applied to the road the one with the smaller wheel has noticeably more acceleration, better hill climbing, and better economy. Plus the higher rpm at equal speed means not only does it make less heat because the motor is less stressed, but it sheds heat a bit better too. How is...
by Stevil_Knevil
Nov 18 2014 2:57pm
Forum: Food and Drink
Topic: uKeg Growler Group Buy?!
Replies: 4
Views: 676

uKeg Growler Group Buy?!

I saw this on Kickstarter-> https://s3.amazonaws.com/ksr/assets/002/738/893/57b02e913b40ae04409edadd88ef5939_large.jpg?1413301044 https://www.kickstarter.com/projects/growlerwerks/the-ukegtm-pressurized-growler-for-fresh-beer ..and immediately thought of you guys :D Anybody else interested to go in ...
by Stevil_Knevil
Nov 18 2014 2:09pm
Forum: E-Bike Technical
Topic: MXUS 3000 Hub Motor - V1 V2 V3
Replies: 1886
Views: 54350

Re: MXUS 3000 Hub Motor

The 'Myth Vs. Math' argument is annoying, but healthy for constructive discussion and discovery I suppose :roll: Volting up and gearing down has been a reliable recipe for almost every eBike builder trying to reliably squeeze higher acceleration and speeds from their machines for several years. Moto...
by Stevil_Knevil
Nov 14 2014 1:45pm
Forum: E-Bike General Discussion
Topic: Where is this going to break?
Replies: 37
Views: 2354

Re: Where is this going to break?

Collarbone.. if you high-side ..so do NOT do that :twisted:

Clamping drops look solid. Speed safely!