Motorcycle Hub Motor Part 2

[Alan B]

Also sucking is limited to a vacuum (14.5 psi or so) where blowing can be at much higher pressure if needed. We use compressed air to cool some items in our synchrotron.

Could even add a water mist to the cooling air...

[We_Go_E_Go]

That's COOL! No I mean REALLY COOL. 4 real.

[GasBus]

hey everyone can anyone help in finding a place where i could order a custom motorcycle hub motor?

[oatnet]

Wow this just gets more and more tempting...

[liveforphysics]

Hook the leads up to a CO2 fire extinguisher nozzle before the start of the race (or put one on the bike),and get that motor in a deep-freeze on the starting line.

[Ricky_nz]

Hook the leads up to a CO2 fire extinguisher nozzle before the start of the race (or put one on the bike),and get that motor in a deep-freeze on the starting line.

But that won't get it super conducting,
perhaps try some liquid helium

PS: I know copper isn't really a super conductor but I imagine its resistance would still be quite low at those sort of temperatures.

[Alan B]

CO2 cooling! Great! Now we can have a bigger carbon footprint! (Of course every tank of gas we burn is produces several hundred pounds of CO2 so the amount one would use for cooling is actually pretty small).

This may have merit on our regular hubmotors. A small tube can bring CO2 in. Some one way flaps in the covers can let it out. Just use it when you really need to keep the motor from overheating! Like that one big hill climb!!

Sorry, back to this great motorcycle hubmotor thread...

Which are the best m/c frames to use this on? A list of good choices would be useful. Perhaps some photos of examples collected in one place.

Thanks!

[markcycle]

CO2 cooling! Great! Now we can have a bigger carbon footprint! (Of course every tank of gas we burn is produces several hundred pounds of CO2 so the amount one would use for cooling is actually pretty small).

This may have merit on our regular hubmotors. A small tube can bring CO2 in. Some one way flaps in the covers can let it out. Just use it when you really need to keep the motor from overheating! Like that one big hill climb!!

Sorry, back to this great motorcycle hubmotor thread...

Which are the best m/c frames to use this on? A list of good choices would be useful. Perhaps some photos of examples collected in one place.

Thanks!

Perhaps some photos of examples collected in one place.

http://www.enertrac.net/photos.php

[patrickza]

Ok who's going to design a really lightweight car with two swingarms + 2 du603's at the rear driving it!

Great work Mark.

[johnhead@frontiernet.net]

Car NO but motorcycle Yes!
Thanks to Marks great motors and his excellent customer service!

[Stevil_Knevil]

+3 ^

Cars lean the wrong direction in turns

[TomA]

Hey Mark:

Neat progress on the motor, especially with the cooling.

I love the forced air cooling, which I probably would make into a CO2 on-demand system, with the custom aluminum wheel likely being fine for me most of the time.

There's still a lot of room for improvement in the wheel's capacity to dissipate heat.

First, surface finishes have a big impact on heat transfer efficiency. Polished metal has about the lowest emissivity of any surface, and what you actually want there is to take advantage of black body radiation on the surface of your heat exchanger. That's why radiators are usually flat black. Black anodizing a dull aluminum surface on the outer wheel would be good, but a thin coating of flat paint is actually better- and cheaper. Here's an interesting short paper about it from the computer business:

http://www.vxibus.org/files/Transferrin ... 20Heat.pdf

There's also a lot of room for improvement in the shape of that wheel. Ideally, it would be like a turbine blade, with axial cooling fins pulling air through itself and around the motor. Probably prohibitively expensive to cast, but fewer, wider blades with enough spacing between them for the machine tools to work could be CNC milled from a thick blank, perhaps within reason on cost. if that isn't practical, blades could be made separately and fitted to spokes cut into the wheel. If nothing else, axial and/or radial fins like on the brake drums of old bikes and cars would also help remove the heat, but they would work even better with the fan blades- cast, machined or attached.

Lastly, even with the best possible fit, the motor should be mounted in the wheel with thermally conductive paste to maximize heat transfer.

Just some ideas for you. By the end of the year, I'll hopefully be needing a setup like this. Also very interested in the 2-4 turn switching.

Great job so far, Mark.

TomA

[markcycle]

EnerTrac is sponsoring team Catavolt with a custom in wheel motor for the TTXGP

Here is a write up on the team and EnerTrac

http://www.egrandprix.com/news.php?id=202

Yea I know it's a little over the top

[ryan_lirui]

Would it be possible to get a 603 in a 10 inch rim?

[markcycle]

Would it be possible to get a 603 in a 10 inch rim?

Smallest we do standard is 16 inch
If you have the rim I'll look at it and see if it is possible

[whatever]

how long till crystalyte sell it to all and sundry...........mmmm

[markcycle]

how long till crystalyte sell it to all and sundry...........mmmm

You think
I'm about to place a order for my third container of motors I take a basic motor and turn it into this

and this

and this


We may have a motor wound in China but EnerTrac builds wheels and traction systems for customers

[johnhead@frontiernet.net]

Mark,
Great looking new wheel designs. I may have to design a LOWRIDER, two wheeler around one of these? It only takes time and $$$$!
John Head

[markcycle]

The EnerTrac.net dual motor on the Catavolt race bike


here is the link to the full set

http://flic.kr/s/aHsjvmpAjw

[SplinterOz]

Thanks for the link Next race is 4pm this afternoon. I will let you know any info as I get it.

[markcycle]

Forced air cooled thru the axle Dual motor mounted on the Catavolt Race bike.

Race Report
http://t.co/saxvgHJ

[markobetti]

Congratulation to Marks motor and Catavolt team !

[markcycle]

Congratulation to Marks motor and Catavolt team !

Thanks more hard work ahead as we tweak the bike for the next race. Its hard when the competition is running Lipo VS our heavy tin can headway cells

[markobetti]

Well that sucks since i dont think the fuel aka batteries should decide the winner .. You dont see in gas races diferent mixes of fuel ; at least i think so. Anyway i read on some e blog that catavolt motor is 10 kw continious; shouldnt it bee 20kw? Good luck on races to come

[markcycle]

Well that sucks since i dont think the fuel aka batteries should decide the winner .. You dont see in gas races diferent mixes of fuel ; at least i think so. Anyway i read on some e blog that catavolt motor is 10 kw continious; shouldnt it bee 20kw? Good luck on races to come

the motor I developed with forced air cooling is more like a 50KW motor