Endless Sphere

I have looked around, and there are numerous ways to approach this. I just don't see one that is what I want yet. Might want to consider Zero Mass Water, a company that makes "water panels" - combined PV and thermal panels that distill water right out of the air. I think it will make abou...

“Stretching a glide” and ... “dive to recover energy through regen”... would appear to be contrary concepts ? Yes, they are. Let's say you are far from an airport. You are then better off in an electric aircraft, since the freewheeling torque from an electric motor is far less than the torque from ...

Very different for running out of fuel at 5,000 ft. Exactly the same. You are then in a glider. Actually you are a little better off in an electric vehicle. You can dive the aircraft to recover some energy through regen. Can't do that with a recip or turbine. Nice to still have the ability to stret...

markz wrote: ↑

Dec 17 2020 8:11pm

Hate to run out of battery power at 5000 feet

Not much different than running out of fuel at 5000 feet.

Are there any models of rear wheel hub motors that allow the rear wheel to just roll along without power, then you just apply power to engage the drive then pull back on the power once youre up to speed? If so what manufacturers might make these please? You are going to find, in general, two kinds ...

If the charge source does not automate the cycle termination based on **some sort** of algorithm to judge when the pack is full it is not a charger. Problem is that: 1) there's no way for a 2 terminal charger to know what voltage the pack wants; anything bigger than about a 3s could be one of sever...

LunaIsFraudulent wrote: ↑

Dec 07 2020 2:16pm

Anyone Else a Victim of Fraud by this company?

Nope. Bought several batteries from them. They were good.

Switch on the + side of the throttle that puts an additional resistor in series. That limits power and is pretty easy/cheap. If you have a 10K pot for example a 10K resistor switched in will cut power in half.

Tube and tire manufacturers endeavor to minimize the force required to deform their products: Right. That maximizes the ability of the compressed air to absorb shock and decreases rolling resistance. I'm running out of ways to illustrate this in lay terms, but why do you think tires blow out on big...

When you hit a bump, the tire begins deflecting, therefore the volume begins to decrease, therefore the pressure begins to increase, until the increasing pressure prevents further deflection. If tires didn't work this way, every bump would result in the wheel bottoming out and a pinch flat . . . ??...

Yep. Agreed with most people here. Go with a 26 inch wheel and full suspension. It's a lot easier to increase speed than torque in a hubmotor, so the smaller the wheel the better. If you're going with a mid drive size doesn't matter as much. But gearing becomes a bigger issue; hard to get a range yo...

john61ct wrote: ↑

Dec 02 2020 7:48pm

The CV period - if there is one - will be a small fraction of the CC stage.

"If there is one?" It is often longer than the CC stage, especially with higher power chargers. (Which is one reason why going higher in power doesn't always get you significantly shorter charge times.)

john61ct wrote: ↑

Dec 02 2020 7:08pm

The charging will take ~twice as long, so no real advantage.

Constant current period will be 2x as long. But constant voltage period will not be, since the charger is at that point supplying all the current the battery can handle. So you see some savings in time.

neptronix wrote: ↑

Nov 28 2020 8:55pm

Are there any other linux geeks out there? desktop guy or server guy

I know as little as possible about Linux and still be able to write (almost) real time Python code for controllers.

dogman dan wrote: ↑

Nov 23 2020 7:36am

Do you want the push trailer to go fast? or push a lot of weight?

Goal is 25mph cruise, 30mph flat out (for a short time.) Trailer is for touring, so a moderate load (40lbs? something like that.) Going on a Coho trailer, which looks promising from a strength perspective.

I have obtained a Crystalyte 404 hub motor on a 26" front wheel are they any good? Reviving this thread from nine years ago: Anyone have any data for this motor? Motor constant? Rough power handling? Statorade compatible? (I assume it would need more sealing) I've got one in a 16" hub and...

as in charge via the main battery wires,not via the c- on the bms,thought it would of been obvious. The balancers will still work. You will generally NOT have overcharge protection if you charge through the load wires. It is critical to use an accurate li-ion charger or supply during charge; you ca...

You may not be planning it, but the State Legislature is ! Sure they are. Just like the ZEV mandate that said we had to have 10% EV's by 1996. its not straw, but it certainly is an Elephant about to drop its load on you. Oh, I can see how in your imagination that's true. You dont seem to get it ......

But, Jack,.. I dont NEED anything . . . . And you've got absolutely nothing - so that works for you. Still Ignoring the Elephant in the room ... the shutting down of Utility Gas + Nuclear etc ! I am not planning on "shutting down gas and nuclear." That's your straw elephant. No jack, look...

Ah, so all you have is a strawman. I figured it was something like that... Strawman ? No Jack, i dont have anything...... Exactly! Thank you. Sure, you have enough sun, but you do not have the solar plants yet. Nor do we have 100% EV's yet. So we don't need them yet. All we have to do is build at t...

. .. Aww ! Cum’on Jack,.. where is all your Green commitment ? If you are going to do it,.. you better get going !.... you dont have too long ! Most “Alarmists” are saying its too late ! Ah, so all you have is a strawman. I figured it was something like that. It doesnt matter when, where, or how , ...

But Jack , that 12 GW “surplus” , is ALL GAS ! ...( infact 40+GW of it !)....Which you greenies keep saying you will be out of by next week ! You are so full of it! Post one time anyone has said we will be out of gas next week. Or even next month. Just one. what will you be using in Ca ?? Solar, li...

Another minor issue could be where/how to supply the power to charge this new EV revolution ? Simple. Solar. Many will be recharging overnight when solar wont be available. . . . . . . at which time the CA grid has 12 extra gigawatts available without straining. Lower demand at night. Which means y...

speedyebikenoob wrote: ↑

Oct 31 2020 9:09pm

Is this possible? Would this be a simple swap? Or are these cassettes very different?

Yes, swap is straightforward. Make sure your derailer can handle the range.

I had an idea but it sounds too good to be true. A motor rated for 2000 watts means in theory I could supply 40v and 50 amps or 100v and 20 amps without it overheating, right? So what if you had a 40v battery pack for lower speeds so you could take advantage of more low end torque but less speed an...