Next, scratch that. THIS years bike

[Andje]

farfle i think the reality is there is a community interested in what you are doing; the interest in the x5400 and cromotor prove it. It's a worldwide interest, it's a growing market, and it's a true hotrod/hobbyist field where price is only an object when you run out of funds. All i'm saying is that if machining down two MP stators and gluing em together works better then the other options out there, then an interest will exist. Then again you haven't wound it yet, right? That's the horrible tedious part of the whole thing as far as I thought?

I have a couple HS35's that I burnt. If you're motor looks successful I will start truly moving on making an hs70; I only hesitate due to lack of funds and the complexity/confidence factor. If it's really as simple as machining down a flange, epoxying things together, rewinding the motor and making a custom axle then I'll do it over the coming year or two. Can't wait to see this motor in action.

[Farfle]

Framebuild is going pretty quick! Here[*]s a few pictures.

[Spicerack]

Mmmm TIG is sexy.... Looking good!

[Farfle]

Mmmm TIG is sexy.... Looking good!

thanks mate, getting better at the whole not dipping the electrode thing . And in other news, got the front wheel laced up. had to drill out the holes in the wheel AND the hub (barely) to get these 12ga spokes to fit, but daaamn they look beefy.

[gensem]

Well, we will have to see what kind of numbers come out of it, there is a lot of manual machining thas done that involves quite a bit of time, so kits would probably be costly. I guess it will all depend on intrest.

Costly like what? I do think there is a market but the market is not big if you are talking over a thousand...
btw a dual magic pie stacked to together should be 20% stronger than the cromotor and it should cool better too.

[Farfle]

Well, parts cost is about 400, plus about 10 hours of my time, so if the machine makes ten and I make 10, thats 600 dollars, assuming that I can continue to source magic pies for 100 apiece, which may not be possible as these were new ones with failed controllers, and i'm not sure if he has much more left. But anywho, if theres enough interest I would be happy to unleash the double pie on ES.

[geetarboy]

Nice design and excellent craftsmanship Farfle, That baby will ride like floating on a cloud with that 52" wheelbase.

[Farfle]

Nice design and excellent craftsmanship Farfle, That baby will ride like floating on a cloud with that 52" wheelbase.

Thanks mate, I really hope so, my biggest concern is the position of the rear shock, it was 1"/3" with a 650lb spring last year, and it was WAY too stiff. even with compression topped out, we still had to let air out of the rear tire to keep it from getting squirly around the rumpled asphalt sections. going for 1"/4"-4.5" on this frame, and ordered in a lighter second spring just in case.

[neptronix]

Remember that the cromotor is about $700 shipped to the USA. That's what you're competing with. If you end up with better performance, the double pie could be a hit.. even if it is a wind-it-yourself affair

I know that the pie is taller than the 9C/Cromotor.. if the stator width is 25mm, then you'll have 50mm just like the cromotor.. but taller..

Anyway i'll shut up now..

[Farfle]

Remember that the cromotor is about $700 shipped to the USA. That's what you're competing with. If you end up with better performance, the double pie could be a hit.. even if it is a wind-it-yourself affair

I know that the pie is taller than the 9C/Cromotor.. if the stator width is 25mm, then you'll have 50mm just like the cromotor.. but taller..

Anyway i'll shut up now..

oops, a single stator width is not 25mm, its 18mm, so its 37mm total, 3mm narrower than the 54xx and 13mm narrower than the cromotor, but that could be fixed by doing a triple pie at 54mm

[Microbatman]

Nice looking welds.
Also wondering
What size bottom bracket did you go with?

[Farfle]

Well, its an 80s giant mtb chromoly bb, that I made an inch longer to clear the controller if it ends up going there, no idea how wide it is.

[gensem]

Erm... I was really thinking of a 11" motor with a 50mm stator.. So the dual pie might not be stronger than a cromotor.
600 usd is not hi a price, but winding all thoses slots would be a major pain.

[Farfle]

It is similar size to the cromotor, bigger than an 54xx, but wound with a usefull kv it will end up being about 11.5kv

[gensem]

Cant wait to see it running Farfle... the frame looks really nice too.

[Jason27]

Thats a sweet bike your building. I wish I had the $$ to build something like that. Best of luck to you.

[Farfle]

Getting more done, been working on the next batch of Genesis swing arms , so not a whole lot of progress, here's some more pictures.

[etard]

Lookin good man! Am I seeing that right? The swingarm
rotates around the Bottom Bracket? If so, I like this idea, my Cove G-spot had this design and clamped onto bearings around the bottom bracket.

[gwhy!]

Getting more done, been working on the next batch of Genesis swing arms , so not a whole lot of progress, here's some more pictures.

Hi Farfle,
Its coming together well. Can I ask a quick question, how did you bend the rectangle steel for your swingarm It looks a lot better than what I did for mine.

[Alan B]

It appears the swingarm pivot is a couple inches behind the bottom bracket. I wonder if the connection there is stable enough against torsional moments.

The Greyborg frame has coaxial bearings for the swingarm.

[kfong]

A frame that flexes at high speeds around corners would be a concern. Single pivot designs seem to have those issues.

[johnrobholmes]

Multi link suspension can be just as flexy, if not moreso from the additional slop of multiple pivots. It is more important to design the pivot and swingarm correctly than to worry about the type of linkage.

[Farfle]

Battery pack is assembled! 24s 3p of 5 ah nanotechs, entering the 1kw/hr club in style

[Andje]

24s3p? why not just go for it with 36s2p?

[gensem]

24s3p? why not just go for it with 36s2p?

Farfle is going to wind his motor, and im gessing its going to be a fast wind. Like 15kv, so he can use 4110 mosfets that handle more current.