Endless Sphere

The accident rates and damage have more to do with the driver's skill, experience and care than the vehicle.

Years ago there was detailed research data that showed the motorcycle accident rates for the first six months of riding were four times the long term rate, and the long term rates of experienced riders were the same as for cars, per mile. The motorcycle overall rates were dominated by new riders, we...

Seems to me one of the string trimmers got to that current level, but I have not verified that

Grainger had them on sale earlier in the year. I haven't had time to finish making my 3D printed connector design test yet.

$60 for 5A is a super deal, two of those would make a great ebike pack!

too many projects!

I have not worked on this project for awhile. Not selecting the smaller packs (2.5AH or less) over 15A continuous is reasonable. I think at a minimum the 7.5AH or a pair of the 2.5AH packs in parallel should be used for ebikes. It would be good to analyze the data lines and see if the (probably seri...

Justin of Ebikes.ca made 10 cell sub-packs and potted them in epoxy for ruggedness and safety. So they are 36V at about 2 or 3 amp hours. If a cell fails (and they only rarely do that) you don't lose the whole pack, which would consist of a bunch of these in parallel, just the one sub-pack is affect...

There are plenty of screw terminal batteries available . . . And many are LiFePO4. But no one uses them on ebikes anymore as they are not as weight or space efficient . . . they are maintainable as you desire, and clearly they can work. Alan B, Yeah, no doubt there are many out there; a few trusted...

There are plenty of screw terminal batteries available. And many are LiFePO4. Both cylindrical and prismatic. Check the DIY EV sites and suppliers, as this is generally where they are used. They were used on ebikes at one time, I even bought a set when I started. But no one uses them on ebikes anymo...

Anyone who has used the BMS chips has commented that it is much, much harder than they expected.

Good luck in your project. Budget plenty of time and money for it.

There are various models. I'm not familiar with every one. But the HLG's at least have been quite good for Lithium charging. I heard at one point they were being used commercially for the purpose. There are some variants even within the series for different means of controlling the voltage/current s...

Nice Setup.

Wow. Amazingly poor design flaw and customer support.

Time to remove Kelly from the approved supplier list.

Seems like these forks need to be recalled. The failures are too frequent and serious.

Rule of thumb when towing - things get "interesting" when the trailer exceeds 50% of the weight of the towing vehicle. It gets "very interesting" when the trailer exceeds 100% of the tow vehicle weight, and and the maximum values of trailer weight are generally in the range of 200% of the tow vehicl...

Tent trailers are the best tents one can have. Ours was 16 feet long on the road and 24 feet long when set up. One person could set it up and take it down. It had hot water, shower, and the usual stove that could be used indoors or out, propane fridge, etc. It could be ordered with air conditioner a...

I've had good luck with both Magura and Domino throttles on the Sabvoton and others.

It may be important to mention that 3D printing requires the design to be adjusted for good printing. Knowing how to make a 3D model isn't enough - it is important to understand the 3D printing design requirements. There are limitations on the angles and curves to get a design that prints well. For ...

The MPCNC can be built fairly large in X and Y, but not so large in Z. However that's fine for a battery case. It uses cheap steel tubing, roller skate bearings, and 3D printer parts. It can also be fitted with a spindle motor for CNC, laser head, etc for multipurpose use. I have a Prusa MK3, it is ...

This thread is from 2015.

Change to moped rims and tires, way fewer flats.

Or just build a bigger 3D printer.

See MPCNC, which can be configured as a 3D printer with a large footprint.

https://www.v1engineering.com/specifications/

Good luck with robot cars abiding the speed limits. They don't.

The death rate from electrocutions is pretty high in some places where they DIY the wiring like that.

What 3D printer do you have? Most aren't large enough to print a good size battery case, unless the pack is fairly small.

I'd usually rather buy equipment that is reliable and not need repair than something unreliable and easy to repair. The potting improves the reliability and value of the equipment. I carried an unpotted charger on my bike for awhile and sure enough, it failed. The potted gear stands up to vibration ...

Protecting from what? Unless you submerge it in water, it should be fine. I live in an area that is close to the ocean and I have come to discover that electrical connections exposed to the salty air around here deteriorate appreciably (I'm not even talking about going to the beach!). I also believ...