Search found 13626 matches

by neptronix
May 05 2021 8:25pm
Forum: EBike General Discussion
Topic: E-bike mid-drive motors hardly outperforms hub motors
Replies: 34
Views: 583

Re: E-bike mid-drive motors hardly outperforms hub motors

Actually the right sized hub on flat ground will be 5-10% more efficient regardless of bike. 3 less gear and chain reductions makes a difference. This is why electric cars generally don't use gears. Friction loss is a bitch even if you have a super efficient motor at the end of it. The only thing th...
by neptronix
May 05 2021 2:07pm
Forum: EBike General Discussion
Topic: E-bike mid-drive motors hardly outperforms hub motors
Replies: 34
Views: 583

Re: E-bike mid-drive motors hardly outperforms hub motors

So many bike manufacturers are building with BB drives nowadays because of the low power legal limitations and the light-weight marketing in bicycle industry. They are making very good ebikes for the bicycle sport crowd, but very poor commuters that are high maintenance and low performance. Yes, it...
by neptronix
May 05 2021 1:41pm
Forum: EScooters/EMotorcycles
Topic: special pleading
Replies: 68
Views: 1682

Re: special pleading

I was facing disability myself at one point, and had to walk around with a cane in my 30's due to the effects of bone deformities that nobody knew how to deal with.. I looked at the market for mobility devices and of course was disappointed and figured that i should build one of my own using lifepo4...
by neptronix
May 05 2021 12:12pm
Forum: Motor Technology
Topic: Yamaha develops 496-horsepower motor for electric hypercars
Replies: 9
Views: 382

Re: Yamaha develops 496-horsepower motor for electric hypercars

Quite typical.. unfortunately to get many of these high tech parts, many of us hobbyists will need to pull them out of scrapped cars.
by neptronix
May 05 2021 9:40am
Forum: EBike General Discussion
Topic: E-bike mid-drive motors hardly outperforms hub motors
Replies: 34
Views: 583

Re: E-bike mid-drive motors hardly outperforms hub motors

The appropriate motor depends on your terrain and conditions. On relatively flat ground ( average of 1-3% grade ), a direct drive immediately wins every efficiency contest due to it's lack of friction from two sets of gears and chain. But loses the power density contest. Once you start climbing majo...
by neptronix
May 04 2021 5:43pm
Forum: EBike General Discussion
Topic: Looking for a 20" foldable fat tire bike that is not an ebike
Replies: 4
Views: 73

Re: Looking for a 20" foldable fat tire bike that is not an ebike

A 20 inch wheeled bike is a good choice if you want to get the most power out of a hub motor. But a lot of them are awfully small or flimsy until you start looking at semi recumbent bikes. I can almost guarantee you'll regret a folding bike as an electric. I haven't ridden one that doesn't seem flim...
by neptronix
May 04 2021 9:25am
Forum: General Discussion
Topic: Lightweighting and aerodynamic optimization of a subcompact car.
Replies: 78
Views: 1629

Re: Lightweighting and aerodynamic optimization of a subcompact car.

I just signed the papers on a ~300 square foot warehouse space which has adequate room for a machine shop on one side, car or crapton of bikes parked in the middle, and electronics shop on the other side. Looking to invest in a small CNC machine, tig welder, and other things i've dreamed of for many...
by neptronix
May 04 2021 9:12am
Forum: General Discussion
Topic: Lightweighting and aerodynamic optimization of a subcompact car.
Replies: 78
Views: 1629

Re: Lightweighting and aerodynamic optimization of a subcompact car.

Seems to me that you could use a much lighter pack of A123 cells to get the same effect. I wish! The big problem with lifepo4 as a car battery is that most alternators want to charge a little higher than the HVC of the cell. If you adjust the alternator's charging voltage downwards ~0.2v to compens...
by neptronix
May 03 2021 6:23pm
Forum: Forum Rules and Features
Topic: The rules of endless sphere.
Replies: 13
Views: 396

Re: The rules of endless sphere.

I see that the moderators trust and respect the members of the forum. I appreciate this attitude. This is an international forum, so sometimes people who communicate here through any translator may simply not understand what their phrase or written question looks offensive to other forum members an...
by neptronix
May 03 2021 6:03pm
Forum: Forum Rules and Features
Topic: The rules of endless sphere.
Replies: 13
Views: 396

Re: The rules of endless sphere.

Two suggestions: "Do not make false claims against a vendor." Recommend changing to - do not make false claims against another member. That way people can complain all they like about Microsoft, Trek, Strava etc, and only have that addition burden of validity if they are complaining about...
by neptronix
May 03 2021 5:40pm
Forum: Forum Rules and Features
Topic: The rules of endless sphere.
Replies: 13
Views: 396

Re: The rules of endless sphere.

What button do I press to indicate that I'm vending? I am not vending ATM but would like to vend in the near future. We do not currently have a system for that, but i do plan to have something like that inside the Xenforo platform once we move to it. Don't worry about openly identifying yourself fo...
by neptronix
May 03 2021 5:38pm
Forum: Forum Rules and Features
Topic: The rules of endless sphere.
Replies: 13
Views: 396

Re: The rules of endless sphere.

.... I guess this means everyone whom sells any one thing on the forum? As in... everybody? ...'cause I am just a little guy and I could see how this wouldn't apply to me, but may because I do, do so much business. When i say vendor i mean someone who operates a business on a part time or full time...
by neptronix
May 03 2021 5:27pm
Forum: Forum Rules and Features
Topic: The rules of endless sphere.
Replies: 13
Views: 396

Re: The rules of endless sphere.

In the #1 Basic Rules of conduct, if possible, I'd like to see the word "repeatedly" removed. I would like to grant that request but i think what constitutes insulting and harassing is very subjective depending on the situation, how members feel about things, etc. I don't want the rule to...
by neptronix
Apr 30 2021 12:21pm
Forum: Forum Rules and Features
Topic: The rules of endless sphere.
Replies: 13
Views: 396

Re: The rules of endless sphere.

I will allow an open comment period on these rules for the next couple weeks.
by neptronix
Apr 30 2021 12:14pm
Forum: Forum Rules and Features
Topic: The rules of endless sphere.
Replies: 13
Views: 396

The rules of endless sphere.

Our #1 goal at Endless Sphere is to provide a low resistance environment for discussing DIY electric vehicles and other loosely related topics. This means that not only do we need rules, but to have fairness in the enforcement of them. Both sides will be detailed here. :es: Our moderator's duty to o...
by neptronix
Apr 30 2021 8:56am
Forum: Vendor Relations Corner
Topic: EM3ev - Not what I expected & no support.
Replies: 21
Views: 347

Re: EM3ev - Not what I expected. Help needed.

Well, wait until you see what it costs to ship an item back to China. If the battery is fully working and free of construction defects ( likely; em3ev is known for good product quality and engineering ), then you can simply use a $10 adapter or re-solder the existing connectors to make use of it. It...
by neptronix
Apr 30 2021 7:56am
Forum: Vendor Relations Corner
Topic: EM3ev - Not what I expected & no support.
Replies: 21
Views: 347

Re: EM3ev - Not what I expected. Help needed.

I think ebikes.ca might be the only company i've bought something from where documentation was sent. We hear complaints about em3ev's customer service being insanely slow to respond every spring. em3ev's products are good and well designed but i hate to hear they didn't take care of you. I suspect y...
by neptronix
Apr 29 2021 7:12pm
Forum: Motor Technology
Topic: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?
Replies: 67
Views: 2461

Re: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?

Yes, anything you put in the motor is going to dilute or destroy the grease and turn into a mess. The fluid you put in must be lubricating itself or able to disperse a lubricant. Do you having any testing for materials compatibility on the Redline Likewater? Materials compatibility is a big problem ...
by neptronix
Apr 29 2021 3:38pm
Forum: Forum Rules and Features
Topic: Big update to the biker bar & order of the forums
Replies: 54
Views: 1516

Re: Big update to the biker bar & order of the forums

I'm also wondering what this is actually about. YPedal isn't with us as a moderator anymore. Whatever happened 10 years ago is finished business. I was not involved in any of those deals. And you also misunderstand my role here. Also what's your previous username? i doubt a guy who has a 2 year old ...
by neptronix
Apr 29 2021 1:49pm
Forum: EBike Build Threads
Topic: Disc Brake Conversion
Replies: 11
Views: 325

Re: Disc Brake Conversion

You'd love regenerative braking. I live in rollercoaster like terrain, so i get a huge benefit from it, as well as at stop and go; just like a hybrid car. I would love to have regenerative brakes on both wheels exclusively if possible. It's nice to have a brake which never truly fades in power, nor ...
by neptronix
Apr 29 2021 12:53pm
Forum: Motor Technology
Topic: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?
Replies: 67
Views: 2461

Re: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?

I've seen people try to sell the remaining grease in ziplock bag packets on ebay like I've seen with the aviation Mobil 28 grease that people talked about packing their geared motors with. It only came in boxes of tubes, gallon and barrel quantities. If you go to the auto/boat parts store, you can ...
by neptronix
Apr 29 2021 12:51pm
Forum: Motor Technology
Topic: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?
Replies: 67
Views: 2461

Re: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?

The current limit of a geared motor is it's ability to shed heat Unless the torque limit of the weakest gear is sooner right?[/quote] Yes, that too. But very often gears can fail for thermal reasons and this would help them. Any motor with white nylon gears uses a nylon formulation with a lower mel...
by neptronix
Apr 29 2021 11:34am
Forum: EBike Build Threads
Topic: Disc Brake Conversion
Replies: 11
Views: 325

Re: Disc Brake Conversion

I'd strongly suggest not using any sort of aftermarket disc brake conversion kit, as they're very often mechanically unsound, and in the event of a structural failure, could result in your rear wheel locking up unexpectedly. Since you have a rear direct drive motor.. if your riding is mostly in the ...
by neptronix
Apr 28 2021 2:20pm
Forum: General Discussion
Topic: Audio recording from internet site
Replies: 10
Views: 350

Re: Audio recording from internet site

OBS studio can capture desktop audio output even on Windows 10, which has restrictions against doing such. it is a video capture program though so i'm thinking it is not capable of producing audio only. It will produce video files. Some tools may exist to dump audio streams out of mp4/mkv files it c...
by neptronix
Apr 28 2021 1:10pm
Forum: Motor Technology
Topic: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?
Replies: 67
Views: 2461

Re: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?

Water? Distilled water isn't a conductive fluid -- as above, it's insulating. My bad on this. But even distilled water does not fit the bill for an environment where you need thermal dissipation and lubrication all in one. Why not? Use marine grease on gears. Why not on mid-drives? Marine grease wo...