Search found 73 matches

by sleepy_tired
Oct 15 2019 2:31pm
Forum: E-Vehicles General Discussion
Topic: Can EVs survive without subsidies ?
Replies: 10
Views: 186

Re: Can EVs survive without subsidies ?

Subsidies are not needed, desired, or beneficial. The desired outcome is that we end up with the companies that produce the best vehicles at a price people are willing to pay. Unfortunately what happens when you have extensive subsidies is that the companies that become expert at manipulating the go...
by sleepy_tired
Oct 11 2019 9:07pm
Forum: E-Vehicles General Discussion
Topic: What are some good 3000 Watt hub motors for 26inch rims?
Replies: 4
Views: 321

Re: What are some good 3000 Watt hub motors for 26inch rims?

I would stick with a leafbike 1500w motor for a bike like that. Add some statorade and you can definitely get 3kw out of it for probably a few minutes at a time. With something to monitor the temperature you'll be golden. Otherwise what'll happen is that you'll end up sacrificing all the positive ch...
by sleepy_tired
Oct 11 2019 2:27am
Forum: E-Bike General Discussion
Topic: "gravity bike" turned to ebike?
Replies: 6
Views: 226

Re: "gravity bike" turned to ebike?

Recumbent bike with fairing and wind sock.

https://www.youtube.com/watch?v=HEALmJkL5cU

Here is a Lightening F-40 averaging 28 mph over a 5.1 mile segment, human powered. He peaked at 36mph on very slight downhills.

http://craigvetter.com/pages/Online_Sto ... store.html
by sleepy_tired
Oct 07 2019 1:19am
Forum: E-Vehicles General Discussion
Topic: Taycan video with some useful information
Replies: 31
Views: 873

Re: Taycan video with some useful information

For everyone that was anticipating German engineering dominance to smash the upstart Tesla, Taycan is a big disappointment - however measured on its own merits without comparisons it's very impressive for a first attempt. It's typical Porsche silliness. Why copy successful designs when you can make...
by sleepy_tired
Oct 05 2019 11:12am
Forum: Polls & Surveys
Topic: When Windows 7 is dead in 2020 what OS will you migrate to??
Replies: 54
Views: 3513

Re: When Windows 7 is dead in 2020 what OS will you migrate to??

Just keep in mind that the majority of Linux users still use Gnome and it's the default for most major Linux distributions. The more you stray into custom desktops and less common installations the more problems and more expertise you are going to need to be successful. I also don't really see much ...
by sleepy_tired
Oct 04 2019 1:54pm
Forum: E-Bike General Discussion
Topic: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?
Replies: 40
Views: 1839

Re: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?

I have never tried a bike with front motor I have a 52v, 35 amp controller with a cheap 1kw motor and it's pretty easy to spin the front wheel on concrete while starting on a steep hill. Also while riding slowly in grass I can goose the throttle and spin the wheel a bit that way. The solution is to...
by sleepy_tired
Oct 04 2019 11:15am
Forum: Battery Technology
Topic: BMS without high current cuttoff. Do they exist?
Replies: 9
Views: 211

Re: BMS without high current cuttoff. Do they exist?

I don't consider a BMS alone to be very good protection against shorts. It's too easy for high current to simply skip small gaps in a PCB. The currents and voltages we use for ebikes is the same levels used for welding steel. It shouldn't have any problem jumping a mm or two of air gap. People reall...
by sleepy_tired
Oct 01 2019 10:40am
Forum: E-Bike General Discussion
Topic: Carbon e-mtb build
Replies: 6
Views: 211

Re: Carbon e-mtb build

Probably the easiest thing to do would be to find out the amperage peaks for the scooter's controller. If you can't do that then measure the amperage of the scooter when you are accelerating hard. You can find watt meters online that will do that for you if you put them inline between the battery an...
by sleepy_tired
Oct 01 2019 10:18am
Forum: Battery Technology
Topic: What Electric Vehicles are using 18650's?
Replies: 6
Views: 332

Re: What Electric Vehicles are using 18650's?

anything to do with my tesla existential threat hypothesis? I am guessing not. next mass-produced commodity FF. Which is probably related to why they are much more successful at producing long lasting high-capacity batteries then other EV manufactures. Taking advantage of commodities for economy of...
by sleepy_tired
Sep 27 2019 11:23pm
Forum: E-Bike General Discussion
Topic: Front suspension or steel frame
Replies: 16
Views: 487

Re: Front suspension or steel frame

I swapped out my suspension fork for a solid fork years ago. I am fine going 25mph or faster. No bombs going off. Nothing exploding. No flat tires or bent rims. No fires or rods of steel plunging into my chest or my head rocketing off my shoulders when I hit a speed bump. When I see potholes or bump...
by sleepy_tired
Sep 20 2019 12:47am
Forum: E-Bike General Discussion
Topic: Hub motor industry dying?
Replies: 250
Views: 7666

Re: Hub motor industry dying?

I strongly suggest that if you are doing a hub vs mid-drive comparison that you actually take the time to do the math on it. Once you do the homework it becomes very obvious: The big advantage to the mid-drive on bicycles is if you are climbing hills that are too big for the motor you can drop it in...
by sleepy_tired
Sep 15 2019 9:53am
Forum: EV Business World
Topic: EU imposing up to a 79% import duty on Chinese ebikes..
Replies: 4
Views: 745

Re: EU imposing up to a 79% import duty on Chinese ebikes..

The EU shitting on China for economic protectionism is just a case of kettle calling the pot black. All that they are accomplishing with this is to screw over a entire continent for the sake of a thousand or less jobs. China giving kick-backs and subsidies really just means that the Chinese people a...
by sleepy_tired
Sep 13 2019 12:31am
Forum: E-Bike General Discussion
Topic: Pre purchase and conversion questions
Replies: 11
Views: 409

Re: Pre purchase and conversion questions

All good MTB are through axle since 15 years. This never kept us from building with hubs. This is a negative on both counts. Hub motors that support thru-axles are rare. The only two I am aware of is (besides custom machined versions), The Crystalyte rear motor thru-axle version and Grin front moto...
by sleepy_tired
Sep 05 2019 1:29pm
Forum: E-Bike General Discussion
Topic: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?
Replies: 40
Views: 1839

Re: 1 kW motor : MXUS, 9C RH212, or GMAC ?

With a Cycle Analyst v3 and a Grin motor... they have thermal sensors. They can be configured to automatically retard the throttle to prevent overheating. As long as that works there really isn't that much you need to worry about as far as hills and hub motors. The Gmac fully configured like above i...
by sleepy_tired
Sep 05 2019 11:00am
Forum: E-Bike Technical
Topic: Battery draining 2x as fast on DD motor with similar controller
Replies: 38
Views: 910

Re: Battery draining 2x as fast on DD motor with similar controller

So my question is: What is going on here? More then likely you are not riding the same on both bikes. A few mph difference, say averaging 22 mph instead of 19, is enough to do this and wouldn't be noticeable. Also if the pedaling effort is slightly different. Also if you are more upright on one bik...
by sleepy_tired
Sep 04 2019 10:17am
Forum: Battery Technology
Topic: 52V to 60V — Is it a noticeable difference?
Replies: 14
Views: 393

Re: 52V to 60V — Is it a noticeable difference?

Going from 52 to 60 should result in a about a 10-15% boost to top speed and similar improvements in mid-range acceleration. If your old batteries are worn out and you are looking to upgrade then it may be worth it. Especially if you upgrade the controllers to ones that support 'field weakening' and...
by sleepy_tired
Sep 01 2019 10:51pm
Forum: Battery Technology
Topic: proper bms
Replies: 12
Views: 340

Re: proper bms

The BMS is there to protect the battery. Yes, but it's not going to protect over current problems when it counts, though. If you really want to protect against over-current then get a fuse that is rated to what you want. Trouble is finding a fuse and fuse holder that is capable of handling 60-100 a...
by sleepy_tired
Sep 01 2019 9:47pm
Forum: Battery Technology
Topic: proper bms
Replies: 12
Views: 340

Re: proper bms

Yes it's probably right. You are almost always better off with specs higher then you need for this sort of thing. Bigger is usually better. It's not going to impact your safety. BMS isn't really going to be able to stop a real short. DC 24-60v and 30-100 amps is the settings people use for welding s...
by sleepy_tired
Sep 01 2019 2:13pm
Forum: Battery Technology
Topic: Cell -log help
Replies: 14
Views: 406

Re: Cell -log help

For the record.. when I was running 'no bms' I relied on the Cycle Analyst v3 for LVC. Used a 60 amp breaker for circuit protection.

Decent motor controllers also have LVC settings. This seemed acceptable to me.
by sleepy_tired
Sep 01 2019 1:08am
Forum: Polls & Surveys
Topic: When Windows 7 is dead in 2020 what OS will you migrate to??
Replies: 54
Views: 3513

Re: When Windows 7 is dead in 2020 what OS will you migrate to??

Steam support in Linux has improved significantly with the introduction of DirectX to Vulcan translator. Wine is the traditional method of running Win32/Win64 binaries on Linux. For DirectX support for games they, have in the past, depended on a DirectX to OpenGL translator. However in the past few ...
by sleepy_tired
Aug 31 2019 9:47am
Forum: Battery Technology
Topic: Cell -log help
Replies: 14
Views: 406

Re: Cell -log help

Having a alarm and/or voltage out pins on LVC seems a pretty standard feature for cell loggers, I think.
by sleepy_tired
Aug 31 2019 3:52am
Forum: Polls & Surveys
Topic: When Windows 7 is dead in 2020 what OS will you migrate to??
Replies: 54
Views: 3513

Re: When Windows 7 is dead in 2020 what OS will you migrate to??

Libreoffice is the one you want. Due to difficulties working with Sun Microsystems the Libreoffice project was formed to incorporate improvements that were being made by third parties trying to improve Openoffice. Nowadays Sun Microsystems is long gone and Apache Foundatation maintains Openoffice, b...
by sleepy_tired
Aug 31 2019 12:24am
Forum: Battery Technology
Topic: Cell -log help
Replies: 14
Views: 406

Re: Cell -log help

I've switched to using one of those bluetooth-enabled BMSes. You can use them for information-only if you run a extra line down to the negative battery side. I ran mine like that for a short while, but I ended up switching over to using it properly, so I can keep track of charge/discharge stuff easi...
by sleepy_tired
Aug 27 2019 9:36am
Forum: E-Bike Technical
Topic: Fitting a cassette to hub motor
Replies: 3
Views: 203

Re: Fitting a cassette to hub motor

Looking at the product pictures here: https://www.aliexpress.com/item/1888675185.html I don't know if that is your motor, but it looks very similar. It appears that there is a third bolt supplied that is supposed to act as the spacer. So going from left to right (disc side to gear side) It looks lik...
by sleepy_tired
Aug 25 2019 9:48pm
Forum: Battery Technology
Topic: Battery not charging, new battery has no Smart BMS
Replies: 11
Views: 365

Re: Battery not charging, new battery has no Smart BMS

Try contacting the manufacturer. They might have a good suggestion.

Swapping out the controlller, for example, so it's compatible with the new battery might be a option.