fastelectricbike - DIY Stealth Bomber

[greasypants]

Can you tell us you set the Magura 5k-ohm resistive throttle to work with the Infineon/Crystalyte controller? Some inline resistors

Yes I just used some inline resistors, can't remember the values but it's in the book. Still has a small dead spot at the begining but it works fine.

 

[greasypants]

These X5 are very strong and difficult to burn. Generaly it's more the phase wire that melt with their teflon insulation going to point of no return... there is one person only i know here that really burned his X5 motor!.. it's Methods that have all honors

It's definitely a problem with the winding, about 6 broken and melted wires in one spot fairly close to the phase wires. I use 160C as the max temp and that has worked for a year. The motor failed when it was cold, I only rode it about 20 feet before it stopped, maybe a wire broke from repeated heating or the insulation failed. Either way I don't think it is fixable and will probably just buy a new motor.

 

[doc007]

I like your idea Greasypants! I must admit though the $6000 price was a bit of a turn-off though. I think it would be tough to convince the average Joe to buy a book knowing that they will have to eventually spend $6000 down the line. I realize this was not your intention considering this was what you spent over several builds. As some other members mentioned, clarifying that part would be nice. Plus it would show that you have some experience under your belt.

Also, I took a look at another members website here not too long ago regarding e-vehicle. (http://www.a123systems.com/hymotion/home) I think it would be AWESOME if you could mimic that site in a way. That way your website can be a little more interactive and less sales pitchy. I have a tendency to shut down automatically and assume 'SCAM' when directed to sales pitch driven site. Unfortunately, all the bad/negative/scam sites out there give your site a bad name even though you have really good intentions.

I look forward to seeing your new site when you get it up and running. Best of luck to you!

 

[mr.electric]

I just read the book. Nice overview of state of the art ebike parts and upgrades. This book would save anyone looking for an education in powerful ebikes tons of time. Searching through this forum for countless days eventually yields some similar build and upgrade techniques but it is never laid out as concisely as in this ebook.

 

[Doctorbass]

These X5 are very strong and difficult to burn. Generaly it's more the phase wire that melt with their teflon insulation going to point of no return... there is one person only i know here that really burned his X5 motor!.. it's Methods that have all honors

It's definitely a problem with the winding, about 6 broken and melted wires in one spot fairly close to the phase wires. I use 160C as the max temp and that has worked for a year. The motor failed when it was cold, I only rode it about 20 feet before it stopped, maybe a wire broke from repeated heating or the insulation failed. Either way I don't think it is fixable and will probably just buy a new motor.

So you opened the motor?.. I mean did you saw any broken magnets?, does the phase wire have real ZERO ohm? ( no induction possible.. just resistive?)

If you can post a pics of these 6 broken and melted wires in one spot fairly close to the phase wires, it wold be nice!.. you cold be part of ourtorture test history!

160 max temp seem a bit high.. but i use that too.. I generally stay at 135... but still never had any problems.

Please could you post pics?

 

[MitchJi]

Hi,

You should have the cost to build the bike, time and tools/skills required.

Nice job on the battery enclosure.

For future builds you might want to consider Cell-man cells. A little more than half the price, lighter weight and much more compact:

http://endless-sphere.com/forums/viewtopic.php?f=14&t=15093

"Testing the big 15 and 20Ah LiFePO4 cells is tough! *Pics*"

http://endless-sphere.com/forums/viewtopic.php?f=31&t=14832

"2.5USD per Ah for 15Ah and 20Ah 30C cells"

These are prismatic cells with the following dimensions and weight
Capacity: 20Ah
Size: 7.0X 166X227mm
Weight: 480g
Capacity: 15Ah
Size: 6.8X 150X211mm
Weight: 400g
3.3V nominal

http://www.endless-sphere.com/forums/viewtopic.php?f=14&t=15408

"Terminating the 15Ah and 20Ah Cell-Man cells"

Would you mind explaining the following?:

* You will also learn how to lower the standover height of your XL frame which means it will be comfortable to ride no matter what your height while increasing the performance of the bike at the same time.

* See how simply changing the handlebars and stem can increase the comfort of a bike frame that would normally be to big for you.

 

[voicecoils]

Would you mind explaining the following?:

* You will also learn how to lower the standover height of your XL frame which means it will be comfortable to ride no matter what your height while increasing the performance of the bike at the same time.

* See how simply changing the handlebars and stem can increase the comfort of a bike frame that would normally be to big for you.

If you bought the book, you'd understand! :wink: :lol:

But you should know the answer anyways, you've been here long enough!

Buy an XL frame to give you enough space for batteries, lower stand-over height by using 24" wheelset instead of 26". Shrink the cockpit with a short stem and straight handlebars (maybe even some rearward sweep too for good measure).

 

[voicecoils]

Can you tell us you set the Magura 5k-ohm resistive throttle to work with the Infineon/Crystalyte controller? Some inline resistors

Yes I just used some inline resistors, can't remember the values but it's in the book. Still has a small dead spot at the begining but it works fine.

hehe that's the spirit! :lol:

I think $47 is too high and $27 is too low. $37 sounds perfect...for about the price of a single PSI cell you get a book with over 100 pages and 150 high quality photographs.

 

[cell_man]

Thanks Mitch but you could have put up a better pic of the termination

This 1 is a bit better.



Sorry to thread jack BTW. I think you've put together a nice bike and fair play for making the knowledge you've gained available in a nice concise ebook.

 

[dogman dan]

Re pricing the book. Anything goes in marketing. You could have it avaliable at a regular website for $47, and at the ES for sale section for less, requiring a PM to get the lower price.

Still a great idea to write the book, reading the entire ES takes a while. I just ended up with a whole summer to do it while my broken bones healed after a crash. And to this day I require a lot of time each day with the pressure taken off my ruined back. Normal folks don't have that kind of time.

I suggest you write another book, very short and very cheap, that just gives an overview of Ebikes. Answer the basic noob questions, Series vs parallel, how the motor works, How to properly mount a hub, choose a frame, etc. Nearly the same as what's in the Ebikes-ca web pages, but even more simply explained for total noobs.

 

[USAEBIKECO]

spending 6k and going 50 mph isnt worth crashing and dieing.

 

[AussieJester]

It has been clarified by the author of the book the bike didn't cost 6k

I honestly hope he sells a heap of books so more are educated
about new tech batteries & the ease of DIY e-bike construction
using quality components rather than buying pre-assembled overpriced sub par e-bikes
piled with lead from questionable stores, has to be a good thing to increase the popularity
of e-bikes right lester12483 :lol:

Good on greasypants for sitting down doing the research and compiling the information
into a book, i think he should charge whatever he thinks is far price TBH. He's done
the ground work and deserves some payback...My personal opinion
on price $29.95 sounds good but if people are buying it for 47 bucks why
lower it!?! (offering it to ES members cheaper is an awesome gesture to)
If you sat here on Endless Sphere to gather all the info i bet it
would take more than 47 bucks worth of your time if you were being paid
just minimum wage.

Best of luck again greasypants

KiM

 

[greasypants]

Re pricing the book. Anything goes in marketing. You could have it avaliable at a regular website for $47, and at the ES for sale section for less, requiring a PM to get the lower price.

Pricing the book was difficult, I took me six months to write the book working a few hours a week on it. Once I start getting some regular traffic to the site I plan to split test different prices to see which price generates the most revenue. I will leave the price at $27 until the end of next weekend for ES members but I may do what you suggested and sell it for less here than the website price, would make sense since I gained most of my knowledge from the forum.

If anyone buying the book has a MAC there may be a problem with the download link not working properly, any issues just email me and I can email the books to you. I will have to try and fix this. You also need the lattest version of adobe reader so the book opens properly because of the security settings. You can download it for free from the adobe website.

 

[greasypants]

I suggest you write another book, very short and very cheap, that just gives an overview of Ebikes. Answer the basic noob questions, Series vs parallel, how the motor works, How to properly mount a hub, choose a frame, etc. Nearly the same as what's in the Ebikes-ca web pages, but even more simply explained for total noobs.

My neighbor gave me the same suggestion for another book. Just the basics for the average Joe who wants to buy or build a simple bike and sell it for $5 or $10 dollars. I may have to try it.

 

[mr.electric]

I think the book you have is excellent. Most people will not follow it step by step but use certain pertinent sections to improve their existing bike.
I am still reading....

 

[greasypants]

I think the book you have is excellent. Most people will not follow it step by step but use certain pertinent sections to improve their existing bike.
I am still reading....

Glad you are enjoying the book. Yes I didn't really expect anyone to build a bike exactly like mine but like you said it's easy to adapt the techinique's I use to fit any type of build.

 

[patrickza]

I like your bike greasy, the poor mans stealth was also what I wanted.

What is the width of your battery box? It looks like it might present a few problems pedaling, though with 2kwh's on board I bet that doesn't happen too often! IMHO the maximum width you could go for with completely unhindered pedaling would be 12.5cm, 13cm at a push...

I agree with the others though on the cellman cells and full suspension. If someone could make me a stealth copycat frame that could hold 36s (2x18s, I think 18 cells stacked is about as wide as you could go in under 13cm) of the cellman cells I'd be buying in an instant... Come on HAL I know you want to

I wonder if you'd sell more if you had a video of the bike performing on the page. I know people think my bike is a joke until they see it move. In fact once people do they always want to negotiate buying it off me. I tell them what it cost to build, about $1500, and then I tell them that I put in a couple of months work so they'd have to pay for my time too and sadly they can't afford the new price. I do offer to help them build one though, currently helping a guy do a hardtail. I've sent him here to learn first, but I guess he would gain the knowledge faster with your book.

Anyway good luck with the sales, I hope it pays off. Hell I'm happy to make $2 a day on google ads for absolutely nothing. It sounds low, but after a year it's $700 for doing nothing. I hve a feeling you'll do far better than that.

 

[greasypants]

If you can post a pics of these 6 broken and melted wires in one spot fairly close to the phase wires, it wold be nice!.. you cold be part of ourtorture test history!

 

[greasypants]

What is the width of your battery box? It looks like it might present a few problems pedaling, though with 2kwh's on board I bet that doesn't happen too often! IMHO the maximum width you could go for with completely unhindered pedaling would be 12.5cm, 13cm at a push...

My battery box is around 7 inches wide which isn't the greatest for pedaling. I designed it this way as I had no intention of pedaling the bike,I wanted an electric vehicle to get me to and from work faster than it takes me to drive.

 

[AussieJester]

I wonder if you'd sell more if you had a video of the bike performing on the page.

He does have a video on his page?

KiM

 

[Spiffy509]

Is your ebook still selling for the reduced price? I am planning on building an ebike and agree searching the forums is a great way to gain knowledge but very time consuming. It would be nice to have a more condensed source such as your book. I'm not planning on building anything as 'intense' as your bike but I would like to get the most out of whatever I do. I am an engineer so knowing what's really going on is an extra treat. All that being said the $47 seems a little high for my taste can I still get it for $27?
Thanks,
excited noob

 

[torker]

I wonder if you'd sell more if you had a video of the bike performing on the page.

He does have a video on his page?

KiM

Kim, did you paint the cruiser? Looks like a new pic. Kewl. Is that an sla batt holding it up? Nice color btw. OK sorry for the hijack bump :lol:

 

[AussieJester]

^^^ Yes & Yes

KiM

 

[greasypants]

Is your ebook still selling for the reduced price? I am planning on building an ebike and agree searching the forums is a great way to gain knowledge but very time consuming. It would be nice to have a more condensed source such as your book. I'm not planning on building anything as 'intense' as your bike but I would like to get the most out of whatever I do. I am an engineer so knowing what's really going on is an extra treat. All that being said the $47 seems a little high for my taste can I still get it for $27?
Thanks,
excited noob

Hi Spiffy,

The book still seams to be selling o.k. at $47 and people who purchase it are very happy with it so I don't have any immediate plans to change the price. I still have to make some changes to the website and if sales drop off I may eventually have to lower the price but for no I plan to leave it.

Thanks

Greg

 

[dogman dan]

Good for you! I had thought that you'd need to stay inside that comfy 19.95, $30 including shipping comfort zone to sell much. There's a good reason all that TV ad shit is that price. Cleary I'm wrong on this product.

Soo, how many headway cells did you order yesterday?

To spiffy, It only took me an entire summer to read all of ES, but that was two years ago when the lifepo4 battery subject was brand new. So $47 should save you about 100-200 hours of reading.