Brushless outrunner motors?

Check this out this one puts out 7000W at 48v!!!!

Hobbycity Online R/C Hobby Store : HXT 80-100-A 180Kv Brushless Outrunner (eq: 70-55) $149.95)

this one guy on my forum used a 5500w one in his razor e300 READ WHAT HE SAYS.

Modified Electric Scooters - Have a Razor e300--Want it TO GO faster!!!

He got 48mph on his gps with more throttle to go. He also says that it has a estmated top speed of 56mph.

thaat first one is a r/c airplane motor........

so,that dosnt matter. The power is what matters. The less weight the better!

Gregsgroup, do you know what is the continous power is for this motor? Cause the peak w is increadible and for only 150$ there must be a catch. So the continous w must be it. If not Cool!

Nope NO catch!

Heres the specs Model:

HXT80-100-A
Turns: 6
Maximum Power: 7000W
Resistance: 17ohm
Idle Current: 3.5A
ESC: 150A
Input Voltage : max. 48V
Kv : 180 rpm/Volt
Weight: 1570g
Shaft: 12mm
Voltage Range: 20-48v
Non Load Current: 3.3A
Equivalent: 60-80cc Gas Engine!

I can think of two catches here that are being over looked.

1. Motor heating, this motor is made to be directed toward a high amount of air for cooling over the motor body. If you are running this motor at 7000 watts, and making 800 watts of heat you need a good plan on how to get rid of that heat.

2. Motor ruggedness. How long are those bearings going to last before you warp that shaft using the motor to drive a pulley or chain? It will work, but you will need to use a jack shaft or some sort of link between the motor and drive wheel to take off the side forces from being generated to the motor.

Heating no problem just attach a fan on the end where the propellor is suppost to go and put a chain sprocket on the shaft.

They say "Upon close inspection these motors have massive Japanese bearings and a very strong overall construction."

hey hey i have a few of those motors plus a few inrunners too.

the outrunners have absolutely rediculous torque and that particular one in the scooter has a 8mm hardened shaft and some pretty decent size bearings to boot. id love to get that massive one one day.

just glue the magnets in with some microballoons as they like to drop off if you put the motor through some shock and its all great. im just putting one onto a stand up razor scooter myself. should be good

youll find the outrunners dont really heat up all that much either because they are so totally ventilated by design and by the outer ring spinning it pretty well dissappates its own heat. but sure a shaft driven fan could never go astray.

thats how the eteks are setup

good thing with the huge outrunners is that you *almost* get free power as you go up in voltage. just double the voltage double the gearing and it just wants to run cooler and hammer out more power

only problem is the controllers. the only one ive got is a 110 amp 36v one thats quite small but i guess you could get any number of controllers to go with it.

would love to chuck a pair of the big ones in a pocket bike find a decent controller and run them both at 60v

Cool we have someone with experience here.
Well im thinking of putting one (a 2000w 36v) in my gt500 scooter.

The Slofly Ebike - Slofly

heres a video of a tiny *800w* motor powering a push bike. doesnt do half bad so you can imagine 7000w (probably more like 3000 genuine) would be not so bad at all

YouTube - World's lightest electric scooter 800W

and one of a 800w scooter

I think im goin to get 4 of these and put them on a mid bike with a nice fancy lithium setup. 48 volts and maybe 100 ah pack?

Aero-Model Inc.


Of course im kidding, i only could wish. Talking 60 plus hp on a pocket bike and the motors would only weigh a bit over 20 pounds!!

Woha 15000w get 4 of those and put them in a electric car lol.

Here this guy put 3 of them on a gokart YouTube - EL go kart

It's pretty amazing what can be done with stuff from the R/C world to electric go karts and bikes. The only problem they have had is reliability issues, which is just a small obstacle. I've been looking into these outrunner motors and have seen that a lot of guys on the rc forums actually modify them to run them twice as hard. Some of these little outrunners are running 6,000 watts continuously.

any tips on the best controller for this motor.kelly do a large range of brushless motor controllers would one of them be okay the
kbl48151 for instance or am i missing something?

A kelly controller wont work for those motors. All high end controllers generally require a Hall effect sensor in the motor. Turnigy has 150-200A controllers that will work with those motors.

You can add sensors to these motors to open up more controller options. The monster 200 turnigy's high current limit is nice, but it still has that pesky voltage limit. Like hyzer says, 48v isn't all they will take.

yep, 48V is only recommended max Once I get me setup running on 48V I will boost it up to 60.


BTW those motors are back in stock ordering one tonight! 100 bucks!