Next, scratch that. THIS years bike

[SamTexas]

... More progress on the motor end of things, got the two lam stacks connected together, and got the two magnet rings glued together, ...

Wow! It's going to be a monster motor!

Just curious: Would running two individual motors - front and rear - accomplishes the same thing? I can see the disadvantage of having 2 controllers, but is there something else?

[Farfle]

End turn losses, spinning the front wheel under power, poor handling, front fork dropout failure, lack of custom winds.... I could go on . Mostly I wanted a hubmotor with the right Rpm/V lots of stator poles, the largest diameter I could get and all of this as inexpensively as possible. There are no hubmotors out there that match that. and total cost on this guy is still under 300 bucks including shipping.

[SamTexas]

Sounds good although I have no idea what "end turn losses" are.

[Farfle]

all the wire that goes from one slot to the next is not doing anything, its just making heat. the only copper doing any good is the stuff in the slots, which the wider the stator is the bigger the ratio of end turn to useful copper is

[biohazardman]

Looks like a wonderful idea to me. Sorry I did not think of it first. Beefy, fatty motor ought to have lots of torque to say the least. Great to see you able to build so much of the bike on your own.

[Idontwanttopedal]

You need post vid soon as it running

[Farfle]

You need post vid soon as it running

can do!

[gensem]

Farfle, why not 3 magic pies and a 17" moto wheel?
Btw whats the stator size of a magic pie?

[Farfle]

Farfle, why not 3 magic pies and a 17" moto wheel?
Btw whats the stator size of a magic pie?

The stator is 260mm by 38mm, 63teeth. And cause I didnt want to end up with a "reasonable mans bike" And whatshisface at the track doesnt like motorcycle bits, hence the bike brake and not a moto brake.

[Alan B]

Are you going to use dual bike discs on the front?

[Farfle]

Nope, just the single disk, no cheap dual disk setups out there.

[Alan B]

The Greyborg's new dual disk front fork and hub is not too expensive.

[fat albert]

I like pie.

[neptronix]

If this motor works out, i vote that you make a DIY kit for putting it together.. consisting of a custom axle, appropriate length of magnet wire, enamel, epoxy, hall sensors, instructions etc.

I'd call it the Boboli motor.

[Farfle]

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.

[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