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by neptronix
Dec 09 2018 8:09pm
Forum: E-Bike General Discussion
Topic: The fastest hub motor for a bicycle when moneys not an issue
Replies: 45
Views: 3663

Re: The fastest hub motor for a bicycle when moneys not an issue

Hey Dylan, since you are new here..

1) Make sure you use the IMG tag to wrap your image URLs, so that we can see the images in the post, not have to click each individual image..
2) Try not to bump 6 year old posts. 99% of the time, nobody is watching them anymore.
by neptronix
Dec 09 2018 8:04pm
Forum: E-Bike General Discussion
Topic: Where are the hq geared hub motors?
Replies: 9
Views: 238

Re: Where are the hq geared hub motors?

You have three options. 1) MAC with an ATF fill, but weld the clutch because it *will* break at higher power levels. 2) forget hubs and do a direct rear chain drive. 3) A high efficiency DD with 0.35mm laminations.. IE the leafbike 1500w, MXUS 3kw, cromotor, etc. I have also been trying to bust MAC'...
by neptronix
Dec 09 2018 7:56pm
Forum: Food and Drink
Topic: Even the mormon capital of the USA has legalized medicinal cannabis..
Replies: 7
Views: 120

Re: Even the mormon capital of the USA has legalized medicinal cannabis..

My biggest bitch about legalization is the continued lack of sources for "medical" grade. Which in many places is highest THC rather than higher CBD. Legalization rode on the back of the medicinal movement, only to forget to cater to those wanting an alternative to opioids. MN has medical but many ...
by neptronix
Dec 09 2018 7:49pm
Forum: Food and Drink
Topic: Even the mormon capital of the USA has legalized medicinal cannabis..
Replies: 7
Views: 120

Re: Even the mormon capital of the USA has legalized medicinal cannabis..

Not even when the users create problems for others and just don't care? How would you handle the problem? Inconsiderate people are just a fact of life. You'll find them all over. Here in Utah, there's a law against texting and driving, but it's never enforced. So texting and driving kills way more ...
by neptronix
Dec 09 2018 2:22pm
Forum: E-Bike General Discussion
Topic: Where are the hq geared hub motors?
Replies: 9
Views: 238

Re: Where are the hq geared hub motors?

MACs today are nearly perfect geared motors, and the stator itself has the thinnest laminations ever seen in any hub motor to keep the cooling issue at bay as much as possible, and the gears/clutch have gone through almost a dozen revisions for strength. The real limit for geared motors is thermal i...
by neptronix
Dec 08 2018 2:44pm
Forum: Battery Technology
Topic: 17ah Samsung 35E at 30A
Replies: 18
Views: 557

Re: 17ah Samsung 35E at 30A

Go look at the datasheet for the cells. It wastes a good amount of energy even at 1C and you want to push almost double that. The most ideal discharge rate, if you want it to last, give very close to full capacity, etc is 1C or 17.5A. Check out the triangle packs. They have more cells in series and ...
by neptronix
Dec 08 2018 2:38pm
Forum: Battery Technology
Topic: Tested my Panasonic cells (Opus), unsure of results
Replies: 5
Views: 93

Re: Tested my Panasonic cells (Opus), unsure of results

The cells need to be warm to get the best out of them. I am pretty sure that internal resistance will be a lot higher in cold temp. I found that my samsung 30Q cells give much less capacity when cold. Also if the cells are new, i would cycle rhem a few rimes before testing Yup. This especially appl...
by neptronix
Dec 08 2018 2:35pm
Forum: Battery Technology
Topic: Tested my Panasonic cells (Opus), unsure of results
Replies: 5
Views: 93

Re: Tested my Panasonic cells (Opus), unsure of results

Laboratories test their cells at room temperature and at like 0.2c to test capacity. Make sure you have this set of conditions if you want to get an accurate result.
by neptronix
Dec 08 2018 11:34am
Forum: E-Vehicles General Discussion
Topic: The economics of scooter rentals.
Replies: 39
Views: 1304

Re: The economics of scooter rentals.

Oops, a little dyslexia there in the calculations.

Thanks for noticing.
by neptronix
Dec 07 2018 9:20pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 2918
Views: 99220

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Its no use comparing energy to inflation, if you income does not increase at the same rate. In many countries , Europe, Australia, UK, etc ,..electricity (and gas) prices have doubled and trippled in the past 5-10 years. Income has not. Unemployment has also increased. Many countries already have s...
by neptronix
Dec 07 2018 9:04pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 2918
Views: 99220

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Yes, that happens anywhere. But energy is cheaper than it's ever been in most parts of the world when you adjust for inflation, to the point where most waste it, and then tens ( if not hundreds ) of thousands of people die a year from pollution, so.. So if you care about the poor, give 'em a gas car...
by neptronix
Dec 07 2018 8:37pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 2918
Views: 99220

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Well, the right thing to do would be to clamp down on the energy obese countries and make energy expensive or somehow difficult to use. So that the ones in the third world don't die for a situation they didn't create. And maybe there'll be a little fossil fuels left for them to not die from hypother...
by neptronix
Dec 07 2018 7:19pm
Forum: Battery Technology
Topic: NASA guidlines to safe high perf 18650 cells batteries
Replies: 4
Views: 195

Re: NASA guidlines to safe high perf 18650 cells batteries

That's awesome and their ideal design they worked out really validates Tesla's choice of spacing the cells so far apart like they do. Also, i didn't know that the Samsung 35E was the current energy density winner. 273whrs/kg is pretty impressive. Also, notice they operate the batteries at less than ...
by neptronix
Dec 07 2018 6:06pm
Forum: Food and Drink
Topic: Even the mormon capital of the USA has legalized medicinal cannabis..
Replies: 7
Views: 120

Even the mormon capital of the USA has legalized medicinal cannabis..

Yup.. the local libertarian enclave here in Utah ( libertas institute ), after many years, managed to get a citizens petition on the ballot, and it won by a freaking hair.. 53% in favor. Cue law enforcement whining about it, and silly stories like these.. ( even though we have a serious opioid epide...
by neptronix
Dec 07 2018 3:59pm
Forum: E-Vehicles General Discussion
Topic: The economics of scooter rentals.
Replies: 39
Views: 1304

Re: The economics of scooter rentals.

Oh interesting, someone else did the math. I found some of these for $200 on alibaba. Surely the real price is ~$250ish. I did not know about the $1 per ride fee. That makes my calculations look better as a business case. Of course, what taxes and regulations government will impose is always a wildc...
by neptronix
Dec 07 2018 3:18pm
Forum: General Discussion
Topic: gas price thread
Replies: 728
Views: 49559

Re: gas price thread

About $2.25 here in Utah.

Too cheap. Pollution will be in the red levels tomorrow and you still see people idling their SUVs for half an hour in parking lots..
by neptronix
Dec 07 2018 12:23pm
Forum: Battery Technology
Topic: How a Lunacycle / Hailong battery fares after 2 years..
Replies: 38
Views: 1250

Re: How a Lunacycle / Hailong battery fares after 2 years..

From the 4 early batteries I opened up, all were somewhat different in construction. Leading me to believe there were several, all different sources. I do have a Dolphin from Luna and one from UPP that are identical, down to the BMS, Kapton, sticky cardboard and reinforced tape used. The worst lot ...
by neptronix
Dec 07 2018 11:47am
Forum: General Discussion
Topic: Volkswagen says last generation of combustion engines to be launched in 2026
Replies: 21
Views: 394

Re: Volkswagen says last generation of combustion engines to be launched in 2026

I would add that there is a company now selling solid state lithium batteries (Pellion Technologies) for drones. They are hideously expensive, and have a lifetime measured in tens to hundreds of cycles. But for critical applications like military drones, they are an option. As time goes on, the pri...
by neptronix
Dec 06 2018 7:14pm
Forum: General Discussion
Topic: la Nina rears her ugly head
Replies: 1031
Views: 44739

Re: la Nina rears her ugly head

We've had maybe 15 days of rain here in Utah. This is the driest year i have seen in my 6 years of living here. They keep diverting water and are basically draining the salt lake right now. Lake effect snow and rain is not happening so much anymore. Summers used to get humid because of the salt lake...
by neptronix
Dec 06 2018 6:45pm
Forum: General Discussion
Topic: Volkswagen says last generation of combustion engines to be launched in 2026
Replies: 21
Views: 394

Re: Volkswagen says last generation of combustion engines to be launched in 2026

Dudes, keep that attitude to the biker bar.. ffs! Anyway, solid states have been around for a while, but they just had pathetic C rates and were unusable which is why we never saw them in production. Batteries always operated on turtle's law.. yes, there haven't been much improvements in the last fe...
by neptronix
Dec 06 2018 5:45pm
Forum: Battery Technology
Topic: Bosch powerpack 400 opening
Replies: 12
Views: 1574

Re: Bosch powerpack 400 opening

I have one at half charge and the BMS just died and there's no physical indication of any damaged components on the BMS, and every cell is between 3.8 and 3.9v.
by neptronix
Dec 06 2018 5:36pm
Forum: E-Bike General Discussion
Topic: Stromer STX1 -> Hack
Replies: 6
Views: 164

Re: Stromer STX1 -> Hack

So it's like an apple product basically, which is pretty much what i suspected from stromer. What's the voltage on the battery? hit it up with a voltmeter and see if it's too low. If it's fully charged, then the BMS suicided itself and you will need to retrofit a new one. I have a Bosch battery here...
by neptronix
Dec 06 2018 5:29pm
Forum: Battery Technology
Topic: How a Lunacycle / Hailong battery fares after 2 years..
Replies: 38
Views: 1250

Re: How a Lunacycle / Hailong battery fares after 2 years..

Oh jesus, that's bad as well. At least your cells didn't get dented like this one i pulled off a customer's bike for inspection just because i knew it was an early luna product. Ended up telling the customer that this is a garage battery and should never ever be stored inside due to physical damage ...
by neptronix
Dec 06 2018 4:30pm
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 89
Views: 8529

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

Just discovered the even smaller Bafang G370 hub motor. 1:12.5 Reduction, 42n-m for just 1.7Kg - sounds kind of silly. Did anyone see the actual thing ? Nice find, fella. A bit porkier than the xiongda ytw-06, but probably better built. Bigger reduction ratio is a plus! Maybe like the G310, it's a ...
by neptronix
Dec 06 2018 3:08pm
Forum: E-Bike Technical
Topic: Can a 1000W hub motor damage a steel frame if ridden harshly (not powerfully)
Replies: 10
Views: 320

Re: Can a 1000W hub motor damage a steel frame if ridden harshly (not powerfully)

So it is demonstrated that torque arms are necessary. If I make my own, I'll probably go with a clamping design since I don't have any precision manufacturing facilities available to me Look at how i used ebikes.ca torque arms on my super hiryuu build in my sig for some hints on how to make precisi...