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by neptronix
Jan 17 2019 10:04pm
Forum: General Discussion
Topic: la Nina rears her ugly head
Replies: 1103
Views: 48282

Re: la Nina rears her ugly head

Dumping buckets in the Salt Lake Valley all day. Reminds me of the rainiest day i'd ever experienced in Portland, Oregon.
by neptronix
Jan 17 2019 9:42pm
Forum: General Discussion
Topic: Fiat Chrysler pays millions...
Replies: 17
Views: 217

Re: Fiat Chrysler pays millions...

Smoke wrote:
Jan 17 2019 8:02pm
If emissions laws were stable from about 1996 untill today, smog would be roughly the same.
That would be true if population was roughly the same ( thus the number of cars would be the same ).
Unfortunately not the case..
by neptronix
Jan 17 2019 4:36pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1399
Views: 163058

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

amberwolf wrote:
Jan 16 2019 3:32pm
FWIW, "dearth" means the opposite (scarcity) of what I think you intended there (great deal).
:oops:

Agree with you on the other points.
by neptronix
Jan 17 2019 4:11pm
Forum: General Discussion
Topic: I'm starting a DIY EV group on a new and upcoming social media site - MeWe
Replies: 5
Views: 185

Re: I'm starting a DIY EV group on a new and upcoming social media site - MeWe

Thank you for joining, dan and mjs and a few others i know are from here. We have had pretty good uptake ( 95 people joining a site they've never heard of ) but not much in the way of participation there. Most of the members are from ES FB. I knew it would be hard to get people away from facebook be...
by neptronix
Jan 17 2019 2:36pm
Forum: E-Bike Non-hub Motor Drives
Topic: NEW CRANK DRIVE 48V 250W AKIEMA
Replies: 4
Views: 151

Re: NEW CRANK DRIVE 48V 250W AKIEMA

Well, i understand it's not an exact clone.

You'd think that with the higher reduction ratio, they'd either be making more power, or the drive would be lighter.
This has been the case with dual reduction hub motors.
by neptronix
Jan 17 2019 12:39pm
Forum: E-Bike Non-hub Motor Drives
Topic: TSDZ2 lunacycle Edition??
Replies: 9
Views: 473

Re: TSDZ2 lunacycle Edition??

Sorry to continue to derail discussion further, but.. https://endless-sphere.com/forums/viewtopic.php?f=2&t=59369&start=100 This thread is actually chock full of reports of the stock motor, AND luna's edition of it failing in extremely short time spans. I bought a Xiongda YTW-06 and it failed ( mech...
by neptronix
Jan 17 2019 12:01pm
Forum: E-Bike General Discussion
Topic: Crystalyte/LiFePO4 preasembled ebike available anywhere?
Replies: 7
Views: 118

Re: Chrystalyte/Li-NMC preasembled ebike available anywhere?

NMC chemistry can ignite for all the same reasons that a li-co based polymer ( pouch ) battery can. If you want safety, lifepo4 chemistry is the best choice. However it comes with a downside of being 2-4 times heavier and larger. Pouch format batteries are not inherently unsafe because of the format...
by neptronix
Jan 17 2019 11:27am
Forum: E-Bike Non-hub Motor Drives
Topic: TSDZ2 lunacycle Edition??
Replies: 9
Views: 473

Re: TSDZ2 lunacycle Edition??

Also be skeptical of someone who does not support their arguments with data and perpetually defends one company when their marketing fibs are pointed out. Here is the dyno graph from Xiongda, in relation to the 2 speed motor i was talking about. The efficiency point chosen by Xiongda correlates with...
by neptronix
Jan 17 2019 10:50am
Forum: Motor Technology
Topic: DA-90 motor
Replies: 18
Views: 1178

Re: DA-90 motor

The efficiency is pretty poor for a motor of this size. If it's peak is really 90%, then it's overshadowed by middle quality axial flux designs that peak at 92-94% efficiency. One example is the motenergy motors that have been around for over a decade. Highly likely that this is a repurposed and rem...
by neptronix
Jan 17 2019 9:30am
Forum: E-Bike Non-hub Motor Drives
Topic: NEW CRANK DRIVE 48V 250W AKIEMA
Replies: 4
Views: 151

Re: NEW CRANK DRIVE 48V 250W AKIEMA

Seems to be a bit heavier or just as heavy as a bbs02, but delivers significantly less power. Price is roughly the same.

I'm scratching my head as to why companies like these bother building clones of clones. ( the BBS02 is a modified clone to begin with )
by neptronix
Jan 17 2019 8:06am
Forum: E-Bike Non-hub Motor Drives
Topic: TSDZ2 lunacycle Edition??
Replies: 9
Views: 473

Re: TSDZ2 lunacycle Edition??

As far as i can tell, they just lied about the Xiongda 2-speed motor, and still are. The actual continuous power of that motor is approximately 300 watts per the dyno graph supplied by the vendor. Yes, overvolting a motor can increase it's power, but it won't take you from 300w to the 1000w claimed....
by neptronix
Jan 16 2019 10:25pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1399
Views: 163058

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

I got so fired up this morning about this topic that i put a video up about it :lol: so at least the debate was good for some motivation.

by neptronix
Jan 16 2019 5:47pm
Forum: E-Bike Technical
Topic: Geared Bafang hub slipping internally
Replies: 6
Views: 96

Re: Geared Bafang hub slipping internally

Well i'd consider running a MAC instead. It's the best built geared motor out there, and very likely much more powerful.
by neptronix
Jan 16 2019 11:38am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1399
Views: 163058

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

I haven't cooked a single motor. Anyone who followed my lead with this motor hasn't cooked it either. We all know the supplied rating is incorrect. Pedego made the mistake of trusting their battery supplier's specifications and the recall on their exploding batteries cost them a million dollars. I s...
by neptronix
Jan 16 2019 11:08am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1399
Views: 163058

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

I think you might overestimate the standardization of such things outside China. It's always going to be a matter of judgment by somebody. The point is that somebody who knows more than you do about the thing they designed and built has offered a power rating that they believe to be valid. Just bec...
by neptronix
Jan 16 2019 9:48am
Forum: Motor Technology
Topic: DA-90 motor
Replies: 18
Views: 1178

Re: DA-90 motor

What information are you looking for? prior posts and links do a good job of outlining the critical details already.
by neptronix
Jan 16 2019 9:33am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1399
Views: 163058

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

The purpose of any motor is to be used WITHIN SPEC. Is this too hard for you? It's like y'all think engineers are there for decoration. This would be a valid statement if China had unilaterally decided to rate their motors through some method other than 'do a dyno in whatever wheel size and voltage...
by neptronix
Jan 16 2019 9:08am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1399
Views: 163058

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Chalo, The problem with smaller spokes is the interface between the hub and the spokes. I've built 2 500-750w geared motors with standard 14 gauge spokes, and even that power level had them pinging and loosening from the get go. There are two problems with this.. 1) a majority of hubs are drilled wi...
by neptronix
Jan 15 2019 9:01pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1399
Views: 163058

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

If you're going to build a 1500w+ motor wheel, i'd consider 14 gauge butted sapim spokes ( which flange out to 13 gauge diameter for extra strength ) to be a bare minimum. May be inadequate for 2kw+ or large wheels like 29ers. A lot of people have had issues running standard bike spokes on powerful ...
by neptronix
Jan 15 2019 4:40pm
Forum: E-Bike Non-hub Motor Drives
Topic: GNG X1-pro 3000w
Replies: 179
Views: 12322

Re: GNG X1-pro 3000w

It would be very strange for a 3000w rated, high efficiency design to put out more maximum torque than a 1000w rated, mid efficiency design.

We will know more once somebody has the product in their hands, which supposedly happens in februrary.
by neptronix
Jan 15 2019 2:44pm
Forum: E-Bike Technical
Topic: BBS02 not working no more
Replies: 16
Views: 429

Re: BBS02 not working no more

My bbs02 did that within the first 100 miles. I had an older unit that was cranked up to 29a though, so that might have been a factor. The cutout was kind of random.

Its a major reason why i sold it after a few months and went back to hubs.
by neptronix
Jan 15 2019 12:26pm
Forum: E-Bike Technical
Topic: 2019 16" moped/scooter tire pop-off: which is the most puncture proof?
Replies: 20
Views: 359

Re: 2019 16" moped/scooter tire pop-off: which is the most puncture proof?

I've had sealant prevent patching a tube in the field when it fails to do it's job after taking too many hits. Made things significantly worse for me. Have also had a tire liner wear a crescent-shaped mark into a tube and popped it in a short time. It also failed to prevent a side flat. This is beca...
by neptronix
Jan 15 2019 11:09am
Forum: E-Bike Technical
Topic: 2019 16" moped/scooter tire pop-off: which is the most puncture proof?
Replies: 20
Views: 359

Re: 2019 16" moped/scooter tire pop-off: which is the most puncture proof?

IMG_20190114_161534.jpg Recently sent the pin through a brand new 16 inch x 1.95 Maxxis Hookworm. Found out that there is 1mm less of total thickness, versus a Schwalbe Marathon Plus ( which is the benchmark for puncture proof-ness AFAIK ). The compound was softer than a marathon plus in the pin pu...
by neptronix
Jan 14 2019 12:10pm
Forum: General Discussion
Topic: I'm starting a DIY EV group on a new and upcoming social media site - MeWe
Replies: 5
Views: 185

Re: I'm starting a DIY EV group on a new and upcoming social media site - MeWe

What i've seen in running the server here, as well as a social media fork of ES.. is that there's a 50/50 split between ESers who like the short format of social media versus the long format of a forum. This forum can go 30 minutes between posts. But the posts are a lot longer. ES FB is much faster ...
by neptronix
Jan 14 2019 11:28am
Forum: E-Bike General Discussion
Topic: Dual suspensions Recumbent with steel frame. New build and futur updates
Replies: 5
Views: 132

Re: Dual suspensions Recumbent with steel frame. New build and futur updates

PS, if this frame doesn't work too well for mounting batteries, check out the Maxarya Ray 2. http://maxarya.com/ray-1/ Beefy dropouts.. better ability to mount batteries under the seat once you take that plastic cover off. Standard shock fitment. 3 inches of rear clearance for a moped/scooter tire. ...