exceed brushless motors good?

[def215]

ive been looking around and planning on my next build for something a little more sophisticated, so im looking at rc motors. i see a lot of people on here unsing the turnigy motor on their motor setups and i ran across this motor in my search for one.
http://www.hobbypartz.com/mo1602brmo.html
does anyone know if these exceed rc motors are any good? or should i go with something that would be proven to work like the turnigy motors everyone else on ES uses? i still have plenty of time before i actually make the purchase because im still doing research on rc drives, so i probably wont start buying parts for this build until spring. i still have testing on my first build to do...lol.

 

[liveforphysics]

ive been looking around and planning on my next build for something a little more sophisticated, so im looking at rc motors. i see a lot of people on here unsing the turnigy motor on their motor setups and i ran across this motor in my search for one.
http://www.hobbypartz.com/mo1602brmo.html
does anyone know if these exceed rc motors are any good? or should i go with something that would be proven to work like the turnigy motors everyone else on ES uses? i still have plenty of time before i actually make the purchase because im still doing research on rc drives, so i probably wont start buying parts for this build until spring. i still have testing on my first build to do...lol.

With a KV that high, you're going to need a multiple stage reduction. This is going to make it cost more than using the 130kv turnigy motor. It also seems a little small to me, but with the right reduction I'm sure it would work. I know nothing about that brand.

 

[RWP]

I think, like Luke, that a 63-57 motor is too small and at 245Kv the rpm/volt is too high for electric bike use.
I have direct experience with a motor of similar size and the heat at the rated voltage was so high it broke the epoxy bond holding the magnets into the bell.
Also at 245Kv this rpm will require greater gear down.

I recommend the Turnigy 80-100-B 130Kv Brushless Outrunner (eq: 70-55)
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=5142
It has updated bearings and a new bearing at the bell opening.
Twice the power and half the Kv and a low price.

In the past HobbyCity motors, especially the smaller ones, have had overheating and bearing issues. In my opinion the newer larger motors as above and below have good quality and are a very good value.

You might also want to look at these although the Kv is a bit higher:
Turnigy 80-100-A 180Kv Brushless Outrunner (eq: 70-55)
TR 80-85-B 170Kv Brushless Outrunner (eq: 70-40)

Then for more $$$ you can check out the Astro's:
http://www.astroflight.com/index.php?main_page=product_info&cPath=20&products_id=122
http://www.astroflight.com/index.php?main_page=product_info&cPath=9&products_id=123

 

[etard]

Haha, I have that exact motor! Just from handling it, the motor seems to be a decent built motor, the windings are tidy, there is no slop,10mm shaft, you can't beat the price. The guys are right about the KV, ACCEPT if you plan to run it for a friction drive on a 26" wheel with the EV Warrior roller. I am gonna do this one day, I just need to motivate! Anyway, I have an extra long 1/2" shaft(inside diameter of roller) that I'm gonna machine down to 10mm for the motor side, isolate the roller completely with outboard bearings, and strap it on. Anyway, get a Turnigy motor, alot of guys are using these with success, upgrades and replacement parts will be easier to find, and I'm sure Matt will be able to strap it onto his reduction drive no problem.

 

[def215]

ACCEPT if you plan to run it for a friction drive on a 26" wheel with the EV Warrior roller.

now were talkin!

I always wanted to do a friction drive setup. That's what I planned on doing on my first build but it ended up as a chain drive. I was inspired by one of your build threads etard where you were gonna use a 3-speed hub as a roller powered by an rc motor. I do want a friction drive so I'll keep that in mind.

Oh yeah for the build I would want it on a bmx bike or maybe a 24 inch mountain bike. Not sure which one to build on yet because I don't really climb any hills in the city. Most likely I'll do more research on the turnigy motors and read some more in swblutos thread about kv's and power.

 

[Lock]

Gettin OT but the only negative I have ever read about friction drive is slippage where the tire is wet. EV Warrior roller like this:


...now if the roller(s) instead were rubber and acted on the rim rather than on the tire... Maybe the same slippage but without any concern about digging "flat" spots into the tire itself... Or maybe a controller selectable to ramp up power more gently in wet conditions.
Just my 2 cents CDN
Lock

 

[def215]

not off topic at all for me...lol. instead of a knurled metal/steel spindle, like the ev warriors, what about a rubber or polyurethane spindle on the tire. would that give grip better than the knurled metal? what about a coat of epoxy on the spindle and coat it with sand? i know the spindle driven goped guys do that to get better spindle traction.