looking for the right motor

[malcav]

I am working on a scooter for drag racing and my math work out to a little over 7kw for the motor which I want to use a brush less hub motor like from a motor cycle but I have been relatively unlucky on finding any. If any one can help on finding some sources. the controller I want to use is rated up to 10kw so I have some play as far as that gos. I'm still kinda new to the Ev scene so I don't have to many sources yet. Any help would be greatly appreciated.

[Jeremy Harris]

The only big hub motor I know of is the one Mark sells, the 602. Take a look at his website, www.enertrac.net and his thread further down in this section, here: viewtopic.php?f=10&t=7718

Jeremy

[BlackArrow]

Hi,

Hum a drag scooter with only 10 KW max power output

seems not enough for me seriously, good day!
Black Arrow

[gwhy!]

Hi,

Hum a drag scooter with only 10 KW max power output

seems not enough for me seriously, good day!
Black Arrow

Hi Blackarrow,
I think its more than possible with maybe even less than 10kw with the right setup, maybe not record braking, but competitive, drag scooters are very fast to accelerate but they have a limited top speed ( due to the restriction of ICE engines) with electric motors this restriction is lifted. When I was playing with the cvt setup on my scooter project I can see the potential is there for very fast acceleration ( and I was only playing with 3.5kw ) and this was on a scooter that wasn't stripped down and lightened.

[liveforphysics]

You were playing with 3.5kw into a motor operating at at least 70-90% efficiency.

Hubmotors start from 0% efficiency, and slowly creep up.

In drag racing, the absolutely critical factor is what happens in the first 60ft.


I would go for this hub:
http://kellycontroller.com/hub-motor-72 ... -p-41.html

And this controller:
http://kellycontroller.com/kbl12401i24- ... p-213.html

Running on a 30S LiPo pack made from these cells in a 2P 30S configuration.
http://hobbycity.com/hobbyking/store/uh ... duct=14616



Those pieces properly combined should be enough to beat at least the 4-stroke scooters. A heavily modded 2-stroke scooter will unfortunately still destroy you.

Hi,

Hum a drag scooter with only 10 KW max power output

seems not enough for me seriously, good day!
Black Arrow

Hi Blackarrow,
I think its more than possible with maybe even less than 10kw with the right setup, maybe not record braking, but competitive, drag scooters are very fast to accelerate but they have a limited top speed ( due to the restriction of ICE engines) with electric motors this restriction is lifted. When I was playing with the cvt setup on my scooter project I can see the potential is there for very fast acceleration ( and I was only playing with 3.5kw ) and this was on a scooter that wasn't stripped down and lightened.

[BlackArrow]

Luke,

Good set up for an electric drag scooter with 111 Volt (nominal), a 400 amps controller now we talking about power output and it's about 4X times the previous 10 000 Watts output set up

Good day!
Black Arrow

[gwhy!]

Luke,

Good set up for an electric drag scooter with 111 Volt (nominal), a 400 amps controller now we talking about power output and it's about 4X times the previous 10 000 Watts output set up

Good day!
Black Arrow

But that depends in what class he want to sprint his scooter, the lowest class I think is 48v And I also think you missed the point in my previous post, You dont need 10's of kw to get the acceleration if you are using gearing. A good 50cc gas drag scooter will do a 1/4 mile in around 12-14sec and a terminal speed of around 90-110mph ( which is pretty good for such a small engine ), What I was getting at is that a 50v auto scoot I believe will be possible to be competitive with these sort of results with using no more than 10kw .

[BlackArrow]

You dont need 10's of kw to get the acceleration if you are using gearing.

I understand your point, but you miss Malcav point he talking about a "Brushless hub motor" from a motorcycle that's different!

Good day!
Black Arrow

[gwhy!]

You dont need 10's of kw to get the acceleration if you are using gearing.

I understand your point, but you miss Malcav point he talking about a "Brushless hub motor" from a motorcycle that's different!

Good day!
Black Arrow

Yes Indeed
Im Sorry BA,
I was getting caught up in the moment and got side tracked and was over looking the key point of the opening post about a Brushed Hub motor .
Cheers.

[BlackArrow]

You dont need 10's of kw to get the acceleration if you are using gearing.

I understand your point, but you miss Malcav point he talking about a "Brushless hub motor" from a motorcycle that's different!

Good day!
Black Arrow

Yes Indeed
Im Sorry BA,
I was getting caught up in the moment and got side tracked and was over looking the key point of the opening post about a Brushed Hub motor .
Cheers.

I understand you my friend is winter here, and i'm not really interested to getting sick, take care of you, good day!
Black Arrow

[vanilla ice]

But Mal seriously, at least check out gwhy's scooter build. For a race version it'd be neat to go with that and 2x up on motors or get a larger single.. Even electric, the cvt would really help in drag racing. Your motor would spin up right in to the happy part of the power band instantly. And stay there the whole run. I know the two stroke guys are doing 12's and 13's so its going to be tough either way you go, hub or non-hub.

[John in CR]

Drag racing with a hub motor? You better build a carbon fiber bike, and find the smallest skinniest child possible to ride it, or maybe a bulimic midget. Don't forget nanotech Lipo batteries.

[malcav]

Ok so my planed system is 96v min 120v, max the scooter weight with the test sla's and 20lb motor that i had on hand is around 80 lbs. With the weight I don't think i should need the crazy power to get the acceleration that i am looking for. And I'm not going to compete yet I'm trying to get my feet wet before I jump in.