Endless Sphere

You have Motor Reliability You have Controller Reliability If you want to create Torque then the first thing to consider is Gear Ratio. This means wheel diameter and KV of motor and Voltage You need all 3 to make a statement The second thing to think about is Squared Losses Current Squared = Heat Sp...

Folks were doing mid-drive kits with 2 stages and belts a long time ago.
Bought a trike from a guy who was experimenting heavily
Not sure where all that went.

Belts are nice. . .

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Any time. I am not in the ethos anymore so the best I can do is vomit up the culmination of years of testing. That is the truth of my testing. Bikes, Trikes, you name it. I am 6'2 and about 185lbs I started with no bike experience to speak of I built apx 40 bikes I rode until my ass was numb Never g...

[/quote] Can you please tell me where did you got those pogo's from, I had been looking and can't find them...but I like them. :D [/quote] Those pogos pictured were from VooPoo, a manufacturer of Vape products. The pogo's I have previously posted are produced by Mill-Max I have no experience with th...

wow, that is quite a load of assumptions. prehaps one should ask questions and/or properly read instead of making assumptions. pretty sure you are ignoring half of my previous post. ps: i never glued a pack in my life and telling people to use hundreds of individual cell holders instead of spot wel...

(late reply) Ok - I do not wish to argue any further with Flippy. He reminds me too much of Liveforphysics and has glue packed batteries. I will leave and you can have final say.. . . . Every time we start a new industry someone like flippy turns up. He appears to have useful information His informa...

Screaming hu? I will consider that a bow. Ok, we can now engage. :) Flippy, So you are a professional pack builder and you have a database? Presumably statistically significant data about the reliability of the packs you have assembled to some specification or standard? How many packs have you built...

I am looking for the front wheel from the same vintage. Works out to about a 20" bicycle rim (which I think is a 17" motorcycle rim) It rides on a shaft, I would have to go measure to see the diameter - 20mm or 1/2" I have one (or had one) Intention is to put it on a Tadpole Trike so when I ride on ...

I have 3 or 4 of those from the dumpster and from test rigs.
If you are in or near Santa Cruz County contact me and I will provide one for free.

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Sick Project Man!

This is what forums are made of. Thanks for contributing. Reminds me of back in the day. . .

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I worked with some of the early Mid-Drive equipment. It SUCKED Looking around now. . . (not at kits but parts on the road) In Santa Cruz we are converging on 50-50 Ebikes for Standard Bikes (not a joke!!!) Most are actually mid-drive High end Shop Purchased I would say... 3:1 mid drive around here. ...

There is probably no greater divide than the gap between Twitter, Facebook, Instagram, ... and other self-masturbation websites ... and a good Public Forum focused around a common interest. I think the Public Forum has probably opened more intellectual doors for me than any other source. The key is ...

eee291 wrote: ↑

Sep 11 2019 1:02pm

Oh yea . . . that was last night.
Forwarding this to my wife

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Flippy is talking about sodium metabisulfite Vinigar may work, but the above chemical is sold at Home Depot specifically for killing root systems. We use it for dropping gold out of solution 1380704558896691-768x576.jpg Fishing_0003-768x574.jpg 1416670195300127-768x574.jpg Fishing_0035-768x574.jpg A...

InStock.png Maybe they are not in stock in your part of the world, but here they are in stock here. I did no shopping .. . just searched for what I know worked 1000 years ago as a "starting point" (Ebike is like RC... information usually goes bad quickly... so I do not know what is currently "best"...

Agreed that cans have a better failure mode. Even better, LiFe cans. They just out-gas and that is it. I have seen epic fireballs from reversed pouch cells. I was once turning over a 5.2L V8 with 4 or 8Ah of 4S 20C and this is what happened: 4_20_2018_014.jpg One pouch erupted The solvents caught fi...

Hello, I am sorry if I am posting this request for help in the wrong section but I am very serious about completing my own jetski conversion. ..... Johnny The only review I ever heard, from an expert, of an actual electric Jet Ski implementation was that it was underwhelming. Going on that singular...

Good luck with the Sevcon guys. . . I wrote a lot, in a lot of threads, and it is mostly garbage. . . but in there you will find some themes. It may be worth your time to sift for nuggets. See where I went wrong over and over. Be very disciplined about how you mix the files, how you back up changes,...

I forgot how rad this forum is. This thread is the sort of thing that gets people hooked. IMAG0448.jpg I hate to spoil it for everyone. .. but this is clearly the baddest bike on the forum right now. See how I have that battery case mounted so it stops me from pedaling??? and... that is the famous c...

My decision matrix looks about like this: First - gotta ride one. The most is learned from a ride. Feel the torque Feel the steering Feel the braking Feel the weight Feel the geometry I am a stickler for RWD and that boils down to uphill traction both on smooth surfaces as well as dirt. FWD will alw...

If you are from the RC world just go to Hobby King and grab some 6S packs. Rig them up Series Parallel and zip-tie them to the frame. You will be riding in hours. . . Then just keep them reasonably balanced and bulk charge. 18650 and all the can solutions require TONS of work building them up. I use...

Bet that thing hammers. I have not kept up over the years but I think a lot of folks are moving toward smaller controllers with more advanced functionality. Lets see... https://www.ebikes.ca/shop/electric-bicycle-parts/controllers.html Hmmm... Skimming I see a lot of words like "Waterproof" and "Fie...

What Else. . . I was contacted by some strange German Man regarding this thread. He came on nice then started ranting in his foreign tongue. I had to use Google Translate. . . and when I did... it was quite entertaining. :lol: I encourage the use of COLORFUL LANGUAGE when you feel the need to expres...

UPDATE: I have had paying work so the parts I bought for this project are rotting under my desk. The good news is that I have been doing ACTUAL DESIGN work lately... so I am all tuned up with what will be needed to succeed at this project. I talked to an enthusiast who has worked on similar systems ...

Thanks for the tip. I have never sued anyone in my life and Lawyers, as a whole, disgust me as blood thirsty sharks. I know only a handful of lawyers who seem to have passed their Ethics Exam. . . and the rest are struggling with CONFLICT OF INTEREST. Your... Points... Are taken tho. I agree that yo...