Search found 184 matches

by JackFlorey
Feb 25 2021 7:11pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Should the charger be "on-board" or not?
Replies: 4
Views: 59

Re: Should the charger be "on-board" or not?

What are the pros and cons of installing the charger so that it is on-board? Pros - Less likely to get stuck Can charge at work/store etc Can leave battery at lower state of charge (helps with life) if you can charge at both ends of the trip Cons - Weight Rain/dirt can damage it I would _not_ put i...
by JackFlorey
Feb 25 2021 6:05pm
Forum: EBike Troubleshooting
Topic: 5000w kit
Replies: 6
Views: 75

Re: 5000w kit

Mark5000 wrote:
Feb 25 2021 4:23pm
So I'm at a loss. Any ideas?
My first thought is just that it's a kit that won't do more than about 3000 watts. Chinese companies in particular are well known for grandiose advertising claims that aren't really valid.
by JackFlorey
Feb 23 2021 11:03pm
Forum: E-Vehicles General Discussion
Topic: Can Tesla converted to diesel?
Replies: 14
Views: 234

Re: Can Tesla converted to diesel?

This is why the Fisker Karma failed. The resulting car had hilariously low efficiency, was expensive, heavy, and slow. Yep. One of the reasons the Prius did NOT fail is that it can be both a parallel and series hybrid. During normal hybrid operation, the motor drives the wheels directly, and the mo...
by JackFlorey
Feb 23 2021 11:46am
Forum: E-Vehicles General Discussion
Topic: Can Tesla converted to diesel?
Replies: 14
Views: 234

Re: Can Tesla converted to diesel?

recog wrote:
Feb 23 2021 10:24am
The question may sound stupid I would like to know if i can run brushless ac/dc motors directly from a diesel electric generator without batteries?
Sure. That's how diesel locomotives work. But it would be a very strange thing to do for a lot of reasons (efficiency, weight, noise, pollution etc)
by JackFlorey
Feb 19 2021 2:18pm
Forum: Battery Technology
Topic: no bms ok for 10s1p minimalist build?
Replies: 10
Views: 191

Re: no bms ok for 10s1p minimalist build?

Just getting ready to make a couple 1p Micro packs with Samsung 40t 21700 For a stealth build that I would typically use RC battery packs for. as I am trying to keep the form factor as small as possible I was looking to run these with no BMS. In my mind, it's OK, I'm not doing it for a customer or ...
by JackFlorey
Feb 17 2021 12:24am
Forum: Large EV General Discussion
Topic: Tesla Roadster rocket option
Replies: 1
Views: 157

Tesla Roadster rocket option

Most people have heard about the "rocket" option for the upcoming Tesla Roadster. The idea is to use compressed air (compressed to 4000psi or so by an electric compressor) shot out of a nozzle for better (and non-traction-dependent) acceleration. I always thought that was fairly silly and ...
by JackFlorey
Feb 14 2021 11:53pm
Forum: Motor Technology
Topic: 3 phase without 6 switches
Replies: 12
Views: 235

Re: 3 phase without 6 switches

Ok, gotta ask this question..I'm building a wheel/hub bldc motor and was thinking can I make a controller that simple cycles through three coils? So instead of delta or star, it is star with a permanent ground at the star. Thus, turn on power to A, then B, then C, then back to A. Now I understand t...
by JackFlorey
Feb 03 2021 11:13pm
Forum: Forum Rules and Features
Topic: If you had the chance to start endless sphere all over again, what would you change?
Replies: 54
Views: 1850

Re: If you had the chance to start endless sphere all over again, what would you change?

Your chances are extremely high. What you see now, is after i lightened up the background. It was worse before. The new forum will also have larger fonts than this, because people have 4k monitors and such that make forums very hard to read. This is not acceptable to me. Why would such people not s...
by JackFlorey
Feb 02 2021 10:18pm
Forum: EBike Troubleshooting
Topic: I gutted a E+'s "in hub" controller - strange results
Replies: 22
Views: 738

Re: I gutted a E+'s "in hub" controller - strange results

Firedog wrote:
Feb 02 2021 9:17pm
He says by electrically inverting the signal of the hall #3, converts 60 to 120 and shows scope traces. That might be worth a try. Can you suggest an inverter chip?
If 5V is available (which it probably is if they are the usual Hall sensors) a 74LS04 or 74LS00 will work fine.
by JackFlorey
Feb 01 2021 7:07pm
Forum: EBike Troubleshooting
Topic: I gutted a E+'s "in hub" controller - strange results
Replies: 22
Views: 738

Re: I gutted a E+'s "in hub" controller - strange results

I expected the same results with the E+ but instead I get much a much reduced current using 3 external controllers. 17a, 30a and 35a max at 54v deliver only a maximum of 12-14amps. Same controllers on any other geared or direct hub motor deliver the rated amps. Anyone want to try an explanation? I'...
by JackFlorey
Jan 26 2021 1:59pm
Forum: General Discussion
Topic: Why not heat my house w heat lamps?
Replies: 53
Views: 1388

Re: Why not heat my house w heat lamps?

john61ct wrote:
Jan 24 2021 3:52pm
I live in a 250 y.o. weatherboard farmhouse, last renovated in the 60's, big and very very leaky barely insulated.
You need one of these:

https://en.wikipedia.org/wiki/EGP-6

12 megawatts should keep the house nice and toasty.
by JackFlorey
Jan 25 2021 10:40pm
Forum: Alternative Energy
Topic: Generating Power 24/7 by using Tides
Replies: 36
Views: 982

Re: Generating Power 24/7 by using Tides

In a flowing river water, If I insert a Steel Pole of 12 inch wide (EYE BEAM) about 12 ft deep and leave 8 ft on top, would that Pole bend because of flowing water? [consider that river bed is reasonably Hard or is rock] Nope. Okay, now insert another Pole of same size next to it 12 inch apart. kee...
by JackFlorey
Jan 22 2021 11:20pm
Forum: Alternative Energy
Topic: Generating Power 24/7 by using Tides
Replies: 36
Views: 982

Re: Generating Power 24/7 by using Tides

As for the piled metal walls, think ship yards, the Panama Canal, the Suez Canal. Those are examples of concrete walls backed by earth. It is a common misconception that in such cases the concrete carry the loads. People think the same thing of roads; they think the asphalt, concrete etc carries th...
by JackFlorey
Jan 22 2021 12:42pm
Forum: General Discussion
Topic: Why not heat my house w heat lamps?
Replies: 53
Views: 1388

Re: Why not heat my house w heat lamps?

Hummina Shadeeba wrote:
Jan 22 2021 2:04am
N get light too.
1) Electric heat is usually the most expensive heat there is and then . . .
2) Summer comes along.
by JackFlorey
Jan 18 2021 12:11am
Forum: Alternative Energy
Topic: Generating Power 24/7 by using Tides
Replies: 36
Views: 982

Re: Generating Power 24/7 by using Tides

The video claims it and that's what is mentioned in the video There are a lot of things on Youtube. Magnet motors are fun; they generate energy from magnetism and give you free energy forever! If you believe the video, of course. but which experiment you suggest to prove it false? I can perform it,...
by JackFlorey
Jan 15 2021 4:34pm
Forum: Alternative Energy
Topic: Generating Power 24/7 by using Tides
Replies: 36
Views: 982

Re: Generating Power 24/7 by using Tides

ONLY If it is continuous wall, without sections. When the wall is divided into sections, this doesn't apply. If what you claim is true, then you could divide ANY wall, dam, berm or levee into tiny sections and it would become much, much stronger and easier to build to withstand the same force. Thir...
by JackFlorey
Jan 14 2021 4:57pm
Forum: Alternative Energy
Topic: Generating Power 24/7 by using Tides
Replies: 36
Views: 982

Re: Generating Power 24/7 by using Tides

Well, here is another experiment. Place a pressure measuring device in a tank on side wall at the bottom. Measure the pressure or force at that point. Pressure is constant all across the wall in that horizontal line. Let's say pressure you measure was 1000 pascal. So lets say the wall is 100 unit l...
by JackFlorey
Jan 14 2021 2:08pm
Forum: Alternative Energy
Topic: Generating Power 24/7 by using Tides
Replies: 36
Views: 982

Re: Generating Power 24/7 by using Tides

I did little experiment on this. Face your Palm facing you. Make all fingers straight. Push any finger using other hand finger (you can use any finger). Do you see force transfer from one finger to other? Now take pen, place it horizontally across fingers, push it against the fingers. Do you see on...
by JackFlorey
Jan 13 2021 10:18pm
Forum: Alternative Energy
Topic: Generating Power 24/7 by using Tides
Replies: 36
Views: 982

Re: Generating Power 24/7 by using Tides

That design don't need that thick wall. That's the principle of design. Divide and Conquer kind of philosophy. If it is continuous wall, then your statement is valid The Thames barrier is not a continuous wall, either. It's made of 10 separate gates. If you partition wall, the forces are not propag...
by JackFlorey
Jan 13 2021 1:46pm
Forum: Alternative Energy
Topic: Generating Power 24/7 by using Tides
Replies: 36
Views: 982

Re: Generating Power 24/7 by using Tides

Generator wrote:
Jan 13 2021 10:52am
Can't that pile wall be designed thick enough to withstand against the load?
Sure. But that is going to be one very thick and very expensive wall. On the Thames, a 1700 foot wall to hold back a 2 meter tide cost half a billion dollars - and took ten years to build.
by JackFlorey
Dec 30 2020 2:03am
Forum: EBike General Discussion
Topic: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction
Replies: 8
Views: 457

Re: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction

Chalo wrote:
Dec 29 2020 11:58pm
Sure!
29" wheel up front, 12" in the back. Much easier to get the power you need out of a small motor, no endos - and think about how many questions you'll get!
by JackFlorey
Dec 29 2020 10:39pm
Forum: EV Business World
Topic: Happy New Year Tesla ..!
Replies: 1
Views: 137

Re: Happy New Year Tesla ..!

Hillhater wrote:
Dec 29 2020 9:06pm
Starting 2021 with a dose of reality from Down Under...
I love watching the Tesla shorts get burned again . . . and again . . . and again . . . .
by JackFlorey
Dec 29 2020 3:17pm
Forum: EBike General Discussion
Topic: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction
Replies: 8
Views: 457

Re: Very Impressed by fast motor winding with gear reduction vs. Slow motor Winding without gear reduction

Chalo wrote:
Dec 29 2020 3:16pm
Sure, but the benefits trade off against additional cost, weight, wear, maintenance, space onboard, noise, filth, pinch hazard, and points of failure when you add an extra reduction stage.
Or just go with a wheel that's half the size . . . .
by JackFlorey
Dec 27 2020 2:15pm
Forum: General Discussion
Topic: Why "It's a Wonderful Life" is the worst Christmas movie
Replies: 12
Views: 528

Re: Why "It's a Wonderful Life" is the worst Christmas movie

Matt Gruber wrote:
Dec 27 2020 4:32am
I don't even watch movies anymore.
So you don't watch them, you just complain about them? Fascinating!
by JackFlorey
Dec 22 2020 10:46am
Forum: Electric Aircraft
Topic: Flying Caravan ??
Replies: 12
Views: 401

Re: Flying Caravan ??

I'd feel a bit safer with a small backup redundant battery for a safe emergency powered landing. As with ebikes, you are always better off making your main battery a little bigger, rather than adding another specialized battery. Having an "emergency" level of discharge is common for EV's ...