Search found 6082 matches

by Chalo
Apr 25, 2018 11:47 pm
Forum: Battery Technology
Topic: Where to buy battery?
Replies: 6
Views: 115

Re: Where to buy battery?

Ah, I see. Well, you've got your priorities straight anyway. Look for a battery from a supplier who credibly claims to use cells from Samsung, Panasonic, LG, Sony, etc. And it should have a full function BMS (battery management system). As 999zip999 suggests, Luna Cycles is a good place to look for ...
by Chalo
Apr 25, 2018 7:58 pm
Forum: Items for Sale - Used
Topic: Panosonic 25ah Prismatic cells for sale $22
Replies: 3
Views: 55

Re: Panosonic 25ah Prismatic cells for sale $22

You don't specify cell chemistry, voltage range, or weight. Do they need to be housed under compression?
by Chalo
Apr 25, 2018 7:40 pm
Forum: Battery Technology
Topic: Where to buy battery?
Replies: 6
Views: 115

Re: Where to buy battery?

They're all Chinese, you know. Are you looking for a domestic reseller, or an actual non-Chinese battery? Because if you can even find one of those, it'll cost you a great deal more than the usual.
by Chalo
Apr 25, 2018 7:30 pm
Forum: E-Bike General Discussion
Topic: Car "replacement" e-bike and where to park
Replies: 10
Views: 116

Re: Car "replacement" e-bike and where to park

In my world, gas bike conversions are for single male alcoholics with poor social skills. I guess it takes a lot of medicine to not mind living with one of those things. 4 cycle gas motors used on bikes are not like those in motorcycles or cars. They're like those in lawnmowers. Which, as anybody ca...
by Chalo
Apr 25, 2018 5:40 pm
Forum: Alternative Energy
Topic: Biomass to Fuel?
Replies: 12
Views: 127

Re: Biomass to Fuel?

Biodiesel is corrosive to diesel engines and at most you can only mix up to 20% - which is really pushing it. What makes you think that? I know that really old diesel engine can have seals that are incompatible with biodiesel, but those are the exception. When I lived in Seattle, my wife used B99 i...
by Chalo
Apr 25, 2018 5:29 pm
Forum: Alternative Energy
Topic: Biomass to Fuel?
Replies: 12
Views: 127

Re: Biomass to Fuel?

Hillhater wrote:
Apr 22, 2018 5:58 pm
I would add ocean going shipping to the list of liquid fuel dependant systems.
Yeah, they never did figure out how to ship stuff by sea before liquid fueled engines, did they?
by Chalo
Apr 25, 2018 5:23 pm
Forum: E-Bike General Discussion
Topic: Car "replacement" e-bike and where to park
Replies: 10
Views: 116

Re: Car "replacement" e-bike and where to park

Put your batteries in a lockable box. Have three locks-- one to enable/disable your electric system, a second one to secure the trike to an immovable object, and the third to render it non-rideable in case it's taken from the rack or pole. Don't use cable locks; they're very easy to cut. Make it a h...
by Chalo
Apr 25, 2018 4:16 pm
Forum: E-Bike General Discussion
Topic: Comfort Bike build or buy
Replies: 4
Views: 56

Re: Comfort Bike build or buy

You know I am on a few other forums and most are middrive bias. Yet I read Grim info and every time I go there I am like maybe I want hub drive instead. A mid drive bike is more like a bicycle. A direct drive hub motor bike is more like a scooter. A geared hub motor bike could go either way, depend...
by Chalo
Apr 25, 2018 3:57 pm
Forum: Battery Technology
Topic: Will 60V work on my e-Bike
Replies: 10
Views: 100

Re: Will 60V work on my e-Bike

Hmm. Well, you want to keep the fully charged voltage under a measured 60V, to keep the capacitors from popping. That means 52V nominal (14S lithium cobalt) is about as good as you'll get. Do you know what the free speed of your motor is? (How fast will the wheel go when it's not on the ground?). If...
by Chalo
Apr 25, 2018 2:26 pm
Forum: Battery Technology
Topic: Will 60V work on my e-Bike
Replies: 10
Views: 100

Re: Will 60V work on my e-Bike

I have it on a moped and i weigh 150pounds so it is strong to take me 30MPH and all that weight too. But I would love to go 35mph. The difference between a well built bicycle and a moped is more or less the speed difference you're talking about. You might be able to buy the extra speed with clubman...
by Chalo
Apr 25, 2018 2:14 pm
Forum: EV Business World
Topic: Tesla Model 3
Replies: 350
Views: 18379

Re: Tesla Model 3

Punx0r wrote:
Apr 25, 2018 2:02 pm
Seems like in that scenario you are paying for a lot of battery that you will never use, and have to lug around for the vehicles' lifetime.
That's different from driving any other car in what way?
by Chalo
Apr 25, 2018 2:41 am
Forum: EV Business World
Topic: Tesla Model 3
Replies: 350
Views: 18379

Re: Tesla Model 3

Arlo1 wrote:
Apr 24, 2018 11:59 pm
Again we don't know its heavy its all PURE speculation!
It's a car. Of course it's heavy.

Cars have to be heavy because car drivers are such giant huevones.
by Chalo
Apr 24, 2018 8:11 pm
Forum: E-Bike General Discussion
Topic: Lightweight/discrete Q128c commuter build on a road bike
Replies: 42
Views: 1369

Re: Lightweight/discrete Q128c commuter build on a road bike

The tubeless sealant stuff curdles and needs to be replaced more often than I ever get flats. And it's really gross.

The colloquialism for tubeless curds is "Stanimals".
https://www.google.com/search?q=stanimals&tbm=isch
by Chalo
Apr 24, 2018 6:37 pm
Forum: EV Business World
Topic: Tesla Model 3
Replies: 350
Views: 18379

Re: Tesla Model 3

It may be possible to mitigate some of the deleterious effects of such a horrendously heavy on vehicle handling, but nothing can be done to mitigate the more serious effect on vehicle energy consumption every time it accelerates. Well, some of the energy that is used to accelerate a heavy vehicle c...
by Chalo
Apr 24, 2018 2:57 pm
Forum: E-Bike General Discussion
Topic: Lacing motor into fat tire rims
Replies: 10
Views: 1438

Re: Lacing motor into fat tire rims

That pattern is bad. The spokes will tend to break at the nipple. Whoever built that either doesn't understand big diameter hubs, or was working around spokes that were easy to get.

Cross-one, twisted radial, or radial. Those are your choices with hub motors.
by Chalo
Apr 24, 2018 2:24 am
Forum: E-Bike General Discussion
Topic: Lightweight/discrete Q128c commuter build on a road bike
Replies: 42
Views: 1369

Re: Lightweight/discrete Q128c commuter build on a road bike

Here's hoping the shop you're dealing with is worth the shekels. At my shop, the labor for a wheel build is $50. Good rims start at about $35. Tubeless tires mean messing with them as much as if you had lots of punctures, but having to do it whether or not you get any punctures. Also, tube swaps are...
by Chalo
Apr 23, 2018 11:45 pm
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 105
Views: 1748

Re: The ultimate torque arm (For <2kW and standard axles)?

Buk___ wrote:
Apr 23, 2018 11:41 pm
Translation: "Technical generalist" -- Jack-the-lad-of-all-trades; master of none.
It's my favorite title I've ever held. Neal Stephenson came up with it.

My next card said "machinist", but that was an incomplete description.
by Chalo
Apr 23, 2018 11:44 pm
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 105
Views: 1748

Re: The ultimate torque arm (For <2kW and standard axles)?

My kind of engineering makes a flatted stud out of 4340 CrNiMo and then attaches it to a flex beam torque wrench to measure the arm's failure torque.

And then it makes a simple closed eye torque arm out of mild steel and performs the same test as a comparison.
by Chalo
Apr 23, 2018 10:35 pm
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 105
Views: 1748

Re: The ultimate torque arm (For <2kW and standard axles)?

200 N That's not a torque, son. No sh...ugar, Dad. (You cannot specify a torque, so you have to specify the force per unit area that would result from the torque acting on the face!) But that'll be over your head. It was still a wrong answer to the question. And would it really be over my head? Wha...
by Chalo
Apr 23, 2018 8:08 pm
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 105
Views: 1748

Re: The ultimate torque arm (For <2kW and standard axles)?

Buk___ wrote:
Apr 23, 2018 7:29 pm
200 N
That's not a torque, son.
by Chalo
Apr 23, 2018 4:23 pm
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 105
Views: 1748

Re: The ultimate torque arm (For <2kW and standard axles)?

Sorry to get you so worked up, kid. But I know from experience and from measurement that lubricating a thread can change the torque:tension ratio by a factor of 2 or more, and the dry lubricity of various materials and different hardnesses can have a similar effect. Fastener torque is the cause of f...
by Chalo
Apr 22, 2018 11:41 pm
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 105
Views: 1748

Re: The ultimate torque arm (For <2kW and standard axles)?

Wedge Locking washers like the NordLock must engage the two faces on either side to work. [...] so to release the nut takes more torque than for it to stay where it is, Nope. With or without a softer surface to bite into, they release at a lower torque than an ordinary flat washer. Chalo apparently...
by Chalo
Apr 21, 2018 10:37 pm
Forum: E-Bike Technical
Topic: The ultimate torque arm (For <2kW and standard axles)?
Replies: 105
Views: 1748

Re: The ultimate torque arm (For <2kW and standard axles)?

Wedge Locking washers like the NordLock must engage the two faces on either side to work. [...] so to release the nut takes more torque than for it to stay where it is, Nope. With or without a softer surface to bite into, they release at a lower torque than an ordinary flat washer. WbLS3rGtKDM
by Chalo
Apr 21, 2018 10:30 pm
Forum: E-Bike General Discussion
Topic: E bike Gearing Why Bother
Replies: 15
Views: 320

Re: E bike Gearing Why Bother

I'm glad to have variable gearing on my BBS02, even though I mostly run it in the lowest two gears. When I first set up my mid drive, I used it almost exclusively with PAS, and I switched mostly between 46/16 and 46/19. Then I installed shorter cranks on it, so I could follow the motor up higher int...