Search found 11081 matches
- Jan 21 2021 3:35pm
- Forum: E-Vehicles General Discussion
- Topic: Mid drive on a three speed
- Replies: 3
- Views: 60
Re: Mid drive on a three speed
The most common 3-speed's are the Sturmey Archer, and the Simano Nexus. Both have a similar construction. 2nd gear is by far the strongest gear if you want to enjoy hard starts. For hill climbing, the best bang per buck is switching to a smaller chainring. Test ride the stock chainring in your top g...
- Jan 15 2021 8:54pm
- Forum: Forum Rules and Features
- Topic: If you had the chance to start endless sphere all over again, what would you change?
- Replies: 47
- Views: 1278
Re: If you had the chance to start endless sphere all over again, what would you change?
On the moderating pages, I would like the buttons to be MUCH larger and farther apart. They are not hard to use on my laptop, but ever since we had a few shotgun-spam attacks, I like to keep up to date with spam on my smart-phone every so often. On the small screen of my average sized smart-phone, m...
- Jan 14 2021 1:47pm
- Forum: E-Bike General Discussion
- Topic: Aerodynamics
- Replies: 307
- Views: 42314
Re: Aerodynamics
Mythbusters had an episode years ago (Bubble Motorcycle) about taking a motorcycle and adding a full body fairing to actually see how much of an improvement in fuel consumption there would be. 250cc enduro style, single-cylinder. Fuel mileage went from 56 to 70 miles per gallon. An extra 14 MPG from...
- Jan 13 2021 3:00pm
- Forum: E-Bike Technical
- Topic: Target wattage from a motor?
- Replies: 3
- Views: 139
Re: Target wattage from a motor?
It all depends on the loads you apply, and how much heat results. If you are heavy, and live at the top of a hill, you need a powerful system to avoid overheating. If you live on flat land and are a light person, you can get adequate performance from an affordable and modest system. Motors only draw...
- Jan 13 2021 12:30pm
- Forum: E-Bike General Discussion
- Topic: Sur Ron and Larger Riders
- Replies: 11
- Views: 232
Re: Sur Ron and Larger Riders
I expect Sur-Rons to hold their value for the near future, due to a lack of comparable competition. Athough the market for them is small, the fan base is enthusisatic. They are currently in demand and are being sold as soon as available. If you can get one, this is when you could resell it and come ...
- Jan 12 2021 11:01am
- Forum: E-Bike General Discussion
- Topic: Disconnect motor phases at high speeds
- Replies: 12
- Views: 258
Re: Disconnect motor phases at high speeds
There have been several 2WD builds featured. They have a benefit in snow and sand, along with any other slippery condition. However, if you never ride in slippery conditions, it's cheaper and easier to simply use a more powerful motor, controller, and battery... One 2WD build definitely had a cutoff...
- Jan 12 2021 10:59am
- Forum: E-Bike General Discussion
- Topic: Disconnect motor phases at high speeds
- Replies: 12
- Views: 258
Re: Disconnect motor phases at high speeds
There have been several 2WD builds featured. They have a benefit in snow and sand, along with any other slippery condition.
However, if you never ride in slippery conditions, it's cheaper and easier to simply use a more powerful motor, controller, and battery...
However, if you never ride in slippery conditions, it's cheaper and easier to simply use a more powerful motor, controller, and battery...
- Jan 11 2021 3:52pm
- Forum: E-Vehicles General Discussion
- Topic: Series Hybrid Drive - into a commuter velomobile?
- Replies: 23
- Views: 511
Re: Series Hybrid Drive - into a commuter velomobile?
When the proposed system has no components specified, it's easy for proponents to praise a system where the ideal motor does not exist. Its also easy for detractors to insult the concept without any evidence. I like a plug-in series hybrid for certain applications. A running velomobile would be inte...
- Jan 11 2021 7:20am
- Forum: General Discussion
- Topic: Is this the same KnightMB that sold us out?
- Replies: 188
- Views: 32477
Re: Is this the same KnightMB that sold us out?
Thanks for clearing that up.
- Dec 30 2020 4:49pm
- Forum: Battery Technology
- Topic: kWeld - "Next level" DIY battery spot welder
- Replies: 1221
- Views: 182221
Re: kWeld - "Next level" DIY battery spot welder
The 0.10mm thick copper may sound thin, but since copper is four times more conductive, with 1/4th the resistance (compared to nickel), the 0.10mm copper is equal in current-carrying ability to 0.40mm thick nickel.
It's also cheaper and more readily available locally than nickel, plus easier to cut.
It's also cheaper and more readily available locally than nickel, plus easier to cut.
- Dec 27 2020 9:56am
- Forum: Battery Technology
- Topic: Spot Welding Copper Strips to 18650 Battery Cells
- Replies: 433
- Views: 69938
Re: Spot Welding Copper Strips to 18650 Battery Cells
Manufacturer ratings are often "fuzzy", but it is extremely valuable to list the type, because you found a combination that works. As you mentioned, this one is rated for 740 Cold Cranking Amps / CCA. If it actually puts out only 700A, it is of no concern, because this model works for this...
- Dec 26 2020 5:31pm
- Forum: Battery Technology
- Topic: Spot Welding Copper Strips to 18650 Battery Cells
- Replies: 433
- Views: 69938
Re: Spot Welding Copper Strips to 18650 Battery Cells
serious_sam whats the brand of polyurethane adhesive? I have heard that "Liquid Nails" construction adhesive has specific properties that work well for certain applications. It "fills" gaps to a certain extent (unlike Cyano-Acrylate "CA" glue), and after curing, it has ...
- Dec 24 2020 8:49am
- Forum: Alternative Energy
- Topic: solar water distillation
- Replies: 31
- Views: 603
Re: solar water distillation
As long as you are eating food, you can drink distilled water with no mineral-leeching effects to your body or health. We could construct a scenario where you are adrift at sea in a lifeboat, but you have a solar distiller providing all the fresh water you can possibly drink. Even then it would take...
- Dec 24 2020 8:14am
- Forum: Battery Technology
- Topic: Spot Welding Copper Strips to 18650 Battery Cells
- Replies: 433
- Views: 69938
Re: Spot Welding Copper Strips to 18650 Battery Cells
Frank, the case of an 18650 cell is nickel-plated steel.
- Dec 24 2020 8:12am
- Forum: Battery Technology
- Topic: Spot Welding Copper Strips to 18650 Battery Cells
- Replies: 433
- Views: 69938
Re: Spot Welding Copper Strips to 18650 Battery Cells
The north American retailer for kWeld has nickle-plated copper for series strips that are corrosion-resistant. It's funny that over the years, people ordered pure nickel ribbon from China, and half the time it arrives as nickel-plated steel, making the builders angry. And now I find myself wanting a...
- Dec 24 2020 12:07am
- Forum: Battery Technology
- Topic: Spot Welding Copper Strips to 18650 Battery Cells
- Replies: 433
- Views: 69938
Re: Spot Welding Copper Strips to 18650 Battery Cells
Thats what the builder said. Adding a cap of nickel or steel works so well, you can get acceptable results with a much lower energy setting on the welder. Personally, I would use the infinite split and also a steel cap to the "sandwich". Steel has more resistance (heat) than nickel, along ...
- Dec 23 2020 5:59pm
- Forum: Battery Technology
- Topic: Can you see anything wrong with this pack build?
- Replies: 21
- Views: 908
Re: Can you see anything wrong with this pack build?
Nice avatar, Chalo. Looks good, brother!
- Dec 23 2020 5:58pm
- Forum: Battery Technology
- Topic: Spot Welding Copper Strips to 18650 Battery Cells
- Replies: 433
- Views: 69938
Re: Spot Welding Copper Strips to 18650 Battery Cells
Its possible that most of the current is passing through the copper from one probe to the other, with almost none going through the cell-tip. Perhaps try slicing the bus down the center, so the left and tight half of the bus is not touching each other. Here is one example...some have called this an ...
- Dec 22 2020 6:01pm
- Forum: Battery Technology
- Topic: Can you see anything wrong with this pack build?
- Replies: 21
- Views: 908
Re: Can you see anything wrong with this pack build?
It is very bad form to solder onto the negative ends of the cells. The heat will damage some of the electrolyte inside. The positive ends can take quite a bit of heat, so soldering is an option with the right tools and techniques. Use a 100W iron with a fat tip to be able to provide a lot of heat (i...
- Dec 20 2020 6:36pm
- Forum: Alternative Energy
- Topic: solar water distillation
- Replies: 31
- Views: 603
Re: solar water distillation from rainwater
You don't have to boil water to vaporise it, just warming it a little will work. Of course, at some point, boiling it for sterilization is good too. Here's a good website to start with.
https://www.builditsolar.com/
https://www.builditsolar.com/
- Dec 19 2020 5:39pm
- Forum: E-Bike Technical
- Topic: Stronger Motor Magnets
- Replies: 29
- Views: 570
Re: Stronger Motor Magnets
For some designs, stronger magnets can also cause stronger cogging. Everything is a trade-off, you get more of one thing, if you sacrifice some of the other thing.
- Dec 17 2020 6:52pm
- Forum: Battery Technology
- Topic: Spot Welding Copper Strips to 18650 Battery Cells
- Replies: 433
- Views: 69938
- Dec 17 2020 2:19pm
- Forum: Forum Rules and Features
- Topic: Other toxic discussions mass unsubscribe.
- Replies: 14
- Views: 502
Re: Other toxic discussions mass unsubscribe.
I am in favor of this.
- Dec 17 2020 2:15pm
- Forum: Battery Technology
- Topic: Spot Welding Copper Strips to 18650 Battery Cells
- Replies: 433
- Views: 69938
Re: Spot Welding Copper Strips to 18650 Battery Cells
This is why these pics are important, few have posted the inside of the can. Use the lowest setting that forms a solid connection, and then...whatever the inside looks like is the standard to measure by. Also, if the setting you are getting good results with makes the welder very hot, you might get ...
- Dec 17 2020 1:19pm
- Forum: Battery Technology
- Topic: Spot Welding Copper Strips to 18650 Battery Cells
- Replies: 433
- Views: 69938
Re: Spot Welding Copper Strips to 18650 Battery Cells
That's a great result, and thanks for posting the pics here. Can I use these pics as an example? (of course, I would credit you)