Search found 98 matches

by sleepy_tired
Aug 23 2019 11:33am
Forum: EV Business World
Topic: JUMP bikes surprise $25 chargest (back to back)
Replies: 2
Views: 756

Re: JUMP bikes surprise $25 chargest (back to back)

Wanting to talk to legal is threatening to sue a company or something like that over the phone is the best way to ensure that they will never be willing to negotiate with you over a charge. After that point it is just going to be lawyers working to make sure you have no chance to win in a lawsuit. I...
by sleepy_tired
Aug 23 2019 3:42am
Forum: EV Business World
Topic: No future for charging networks ?
Replies: 28
Views: 3391

Re: No future for charging networks ?

On par with gas / diesel vehicles that are used for long road trips all the time. The worst car, in terms of range, I've driven is my little econobox with a 10 gallon gas tank and it gets around 340-450 miles at 75mph. So better then 500 km always. The bigger difference, of course, is that it takes...
by sleepy_tired
Aug 22 2019 10:28am
Forum: E-Bike General Discussion
Topic: Help finding a "unicorn" steel rigid fork
Replies: 22
Views: 1014

Re: Help finding a "unicorn" steel rigid fork

I got rid of my suspension fork years ago and replaced with a Surly Ogre solid fork. I recommend Surly. They are a good brand that makes bikes that are actually useful rather then adhering to marketing-driven fashion. It was a nice upgrade and enabled me to get a nice front rack on the bicycle as we...
by sleepy_tired
Aug 21 2019 12:04pm
Forum: E-Bike General Discussion
Topic: Rear hub or Mid-drive (should I just flip a coin?)
Replies: 26
Views: 1548

Re: Rear hub or Mid-drive (should I just flip a coin?)

It really boils down to how steep of hills you are dealing with and how much effort you want to put into pedaling up those hills. If the answer to those questions are 'very steep' and 'as littlle as possible'... then mid-drive is the no-brainer goto. --------- The problem with talking about hills is...
by sleepy_tired
Aug 21 2019 11:22am
Forum: E-Bike General Discussion
Topic: Rear hub or Mid-drive (should I just flip a coin?)
Replies: 26
Views: 1548

Re: Rear hub or Mid-drive (should I just flip a coin?)

Mid drives are retaining the bicycle feel, while hubs are more moped like, even motorcycle like when high powered. I would pick a small geared hub motor over mid-drive if my goal was to retain 'bicycle feel'. The reason being that a lot of mid-drives do add additional drag to the pedaling process, ...
by sleepy_tired
Aug 16 2019 9:29am
Forum: E-Vehicles General Discussion
Topic: E Hiking Cart
Replies: 13
Views: 1470

Re: E Hiking Cart

Thanks for the links, I'd not thought of aliexpress, it seems the likely sorce looking at that, I see they also have a big freewheel cog in this kit :) Yeah they do. With that motor, since it doesn't have a gear reduction, may be too fast for what you want. But I don't know. With the freewheel and ...
by sleepy_tired
Aug 16 2019 3:30am
Forum: E-Vehicles General Discussion
Topic: E Hiking Cart
Replies: 13
Views: 1470

Re: E Hiking Cart

I would just make a little 4-wheeled cart in the spirit of garden wagons. Were you have two wheels attached to the pull handle and they pivot along for steering. Something like this: https://www.lowes.com/pd/Gorilla-Carts-7-cu-ft-Poly-Yard-Cart/1000772546 with something like this: https://www.aliexp...
by sleepy_tired
Aug 16 2019 2:16am
Forum: E-Scooter and Motorcycle General Discussion
Topic: We regret to inform you that scooters aren’t actually good for the environment
Replies: 4
Views: 755

Re: We regret to inform you that scooters aren’t actually good for the environment

“We welcome research into the environmental benefits of new mobility options; however, this study is largely based on assumptions and incomplete data that produces high variability in the results. We believe micro-mobility will reduce pollution and mitigate climate change.” That statement from Lime ...
by sleepy_tired
Aug 15 2019 10:22am
Forum: E-Bike General Discussion
Topic: Front suspension forks question
Replies: 43
Views: 1856

Re: Front suspension forks question

If you look closely at the snap you might be able to see some striations... sort of like half-rings on a tree or variations in the texture. Or some discoloration on one side or the other. Some part of the metal that is darker and then a nice brightly colored bit. That would indicate that it was dama...
by sleepy_tired
Aug 14 2019 10:16pm
Forum: E-Bike General Discussion
Topic: Front suspension forks question
Replies: 43
Views: 1856

Re: Front suspension forks question

I have a 1000w yescomusa hub motor on a solid front fork. It's good once you are moving.. like over 5mph it'll pull you along no problem. But if you are in the grass or stopped on a hill then there is no traction to get you moving. Unless I pedal hard the motor wouldn't be able to get me out of my o...
by sleepy_tired
Aug 13 2019 2:02am
Forum: Battery Technology
Topic: Nishi 18650 pack building kit
Replies: 49
Views: 5284

Re: Nishi 18650 pack building kit

One of the advantages to this design, maybe, is that it would be very easy to modify to have fusible links. Take one of those metal screw bits, cut it in half, and then bridge the two parts together with a short bit of fuse wire and solder it. Or just grind it down in the middle so it is it's own fu...
by sleepy_tired
Aug 13 2019 1:59am
Forum: Battery Technology
Topic: Nishi 18650 pack building kit
Replies: 49
Views: 5284

Re: Nishi 18650 pack building kit

It am sure it's dielectric, but it's not a hard paint-like thing like conformal coating. It's just a sort of thin oil. So it won't interfere with direct metal on metal conduction. I learned about it on this forum, people use it to protect their battery terminal blades on hailong-style battery packs ...
by sleepy_tired
Aug 13 2019 1:17am
Forum: E-Bike Build Threads / Photos & Video
Topic: Lightweight efficiency oriented BikeE conversion
Replies: 48
Views: 5397

Re: Lightweight efficiency oriented BikeE conversion

Does that statement still apply if the amount of raise on both wheels is the same? Yes, a little bit. Imagine a line going through the middle of the head tube until it touches the ground. That's the angle the steering rotates on. Mark that point on the concrete. Then mark the center of the tire pat...
by sleepy_tired
Aug 12 2019 7:27pm
Forum: Battery Technology
Topic: Nishi 18650 pack building kit
Replies: 49
Views: 5284

Re: Nishi 18650 pack building kit

That being said, Beryllium-Copper (2% Be - 98% Cu) is an excellent coil-spring material, I wasn't worried about the springiness. I was just concerned about green oxide coating in humid environments causing increased resistance. But I think that is something easy to take care of with some anti-corro...
by sleepy_tired
Aug 12 2019 6:08pm
Forum: Battery Technology
Topic: Nishi 18650 pack building kit
Replies: 49
Views: 5284

Re: Nishi 18650 pack building kit

The thing I would be worried about is corrosion on the bare copper spring. I would probably spray the coils down with ACF50 or similar corrosion preventative, provided it doesn't react with the platics or anything like that. In addition to that if I had a nice wooden or plastic box that was designed...
by sleepy_tired
Aug 12 2019 3:25am
Forum: E-Bike General Discussion
Topic: Hub motor industry dying?
Replies: 270
Views: 17032

Re: Hub motor industry dying?

Right, I'm just saying, we practically know from the competing alternatives, what that new mechanism will be - the design breakthrough that combines the advantages of the crank drive, geared hub and direct drive. Left hand drivetrain on a mid-drive. No clutch, no freewheel. 1-gear. No going through...
by sleepy_tired
Aug 12 2019 3:14am
Forum: E-Bike General Discussion
Topic: Hub motor industry dying?
Replies: 270
Views: 17032

Re: Hub motor industry dying?

Adding a motor for regen has a negative result. It takes more power to spin it, that the power it produces. And you are basing this on.. what exactly? I think there is a lot of bad assumptions in this statement. You also don't need to have a hub motor to get regen. Properly designed mid-drives can ...
by sleepy_tired
Aug 11 2019 2:58pm
Forum: E-Bike General Discussion
Topic: The holy grail for ebike wheels - 22 inch BMX rims = 18" motorcycle wheel diameter
Replies: 16
Views: 1491

Re: The holy grail for ebike wheels - 22 inch BMX rims = 18" motorcycle wheel diameter

Maybe you can just use standard 18" moto rims instead of the BMX rims?

This way you can get angled spoke holes in the rim, which would make lacing up a hub motor easier.
by sleepy_tired
Aug 11 2019 1:21pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Lightweight efficiency oriented BikeE conversion
Replies: 48
Views: 5397

Re: Lightweight efficiency oriented BikeE conversion

Bicycles are naturally rear-heavy and sometimes these recumbents have almost no weight on the front. If you can find a nice big hill in your area it may be worth your time to figure out how well the bike handles at speed with different weights in different locations. I suspect that adding the batter...
by sleepy_tired
Aug 10 2019 11:57pm
Forum: EV Business World
Topic: Dreams into reality
Replies: 8
Views: 1330

Re: Dreams into reality

Probably should try to start off the same way a lot of other 'ebike' companies started... Go on Alibaba and find some bikes that are similar to what you want, figure out who the original manufacturer of that bike was, and then work with them to get something setup how exactly you want. Unless you wa...
by sleepy_tired
Aug 09 2019 12:04pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1079
Views: 97817

Re: APL's DIY axial-flux motor

Such a bad-ass accomplishment. Very good.
by sleepy_tired
Aug 09 2019 12:19am
Forum: Motor Technology
Topic: Legit electric motor technology breakthrough?
Replies: 19
Views: 2498

Re: Legit electric motor technology breakthrough?

Looks like the main part of the real 'innovation' is the mechanism they patented to enable the mechanical field weakening. That rotating drum in the middle of the motor that allows them to move the magnets out of phase. Related to this, I suppose: https://iopscience.iop.org/article/10.1088/1757-899X...
by sleepy_tired
Aug 07 2019 10:43am
Forum: E-Bike General Discussion
Topic: Hub motor industry dying?
Replies: 270
Views: 17032

Re: Hub motor industry dying?

crank ("mid") drives are going to hold on comfortably as the only way to make versatile use of a small motor, because they provide multi speed gearing. And people will continue to deal with the high expense and continuous maintenance these devices demand as well, then. If somebody designed a IGH th...
by sleepy_tired
Aug 07 2019 10:38am
Forum: E-Bike General Discussion
Topic: Hub motor industry dying?
Replies: 270
Views: 17032

Re: Hub motor industry dying?

BUT: Where are the modern, lightweight DD hubs? 4kg, 135mm, Disc Adapter, Cassette Adapter? You know, a DD for the low power market. For countries with an effective Bike Law, for people who actually WANT to pedal? The small DD hub motors I've looked at are really inefficient. Like 60-74%. I don't k...
by sleepy_tired
Aug 06 2019 3:31pm
Forum: E-Bike Technical
Topic: Controller recommendation for good PAS experience
Replies: 14
Views: 867

Re: Controller recommendation for good PAS experience

I am no expert in this as I really have only ridden one style of PAS. So don't be surprised if everything I say is 100% wrong. But there are two common methods of PAS control: 1. Speed limit. 2. Power limit. So a lot of the cheap kits only have speed limits. So different 'PAS levels' really means di...