HV Brushed Matrix? - RC-Monster Forums

Takedown · **HV Brushed Matrix? -** 09.19.2008, 07:52 AM

Have any one of you guys ran lets say 36-48v on a 1/8 with a powerful brushed setup? Ive been thinking about doing something like this with my matrix so it will have absolute gobs of power and some good speed. I was thinking I could run a motor such as the "24v 100w black can"...
http://www.electricscooterparts.com/motors.html

on lets say 36v "2x of those"...
http://www.hobbycity.com/hobbycity/s...00mAh_5S1P_15C

and a brushed HV ESC...

http://www.astroflight.com/index.php...products_id=91

I know its RCM "The best place to be for brushless activity but I want to see how this will run. I will ofcourse be running chain drive to the center diff and a custom mount for the motor.

brushlessboy16 · 09.19.2008, 07:54 AM

oh here we go again

Takedown · 09.19.2008, 07:55 AM

Yeppers, I just want to see what kind of torque this thing will have because the driveline is pretty damn solid. BTW: respond on aim.

Takedown · 09.19.2008, 07:59 AM

Heres what I figured...

ESC- $60
Motor- $30
Batts- $160
Custom mount- ?
Trays for batts- ?

Really not that bad if you ask me.

brushlessboy16 · 09.19.2008, 08:03 AM

batts don tpush that many amps... why not just get bl

Takedown · 08:08 AM

Motor wont pull any amps. Its a small Razor E100 motor. These motors dont pull many amps. Their all torque.

BrianG · 09.19.2008, 11:23 AM

The only good thing about brushed is the absolute lack of any chance of cogging. But, for a given motor output, there will be more losses in a brushed setup which obviously results in lower efficiency. Not to mention brush and contact wear.

That said, those two 18v motors would have to be put in series to operate on 36v.

Other than that, it should be fine.

Takedown · 09.19.2008, 11:50 AM

These motors are heard to have run up to 48v with a light load meaning 40-60lbs kids riding them. It will run 36v-48v without issues.

Takedown · 09.19.2008, 11:51 AM

Im not worried about efficiency because I'd take power of runtime. I'd be happy with 5mins runtime.

brushlessboy16 · 09.19.2008, 01:40 PM

hey ryan... might have found you a SIM motor..

Needs some endbell bolts but the comm is clean and brushes have lots of life in them,

74% efficiency
440kv
5280rpm on 12v. should be able to do 36 :D

Takedown · 09.19.2008, 06:22 PM

Quote:

Originally Posted by trev3813

Isn't this a Brushless Forum.....

Why do you think I quoted this in the first post...

Takedown · 09.19.2008, 09:27 PM

I think Im going to have to pass on the motor ben. It will be a amp hawg if it has 4x the kv ratings of all the other motors of the same size and I want this to be a very low amp draw setup.

BL_RV0 · 09.20.2008, 12:21 AM

Do you plan to put diff locker oil in the shocks? You're gonna need it. Its basically going to be a 35mph cinderblock.

SpEEdyBL · 09.20.2008, 01:12 AM

I don't think this is going to be any faster than a stock tamiya rtr. Tell me how a 100 watt brushed motor = "a poweful brushed setup." Plain and simple 100 watts is 100 hundred watts, so even if it has 10 times the torque of a 1000 watt brushless motor, it will have 1/100 the rpm.

Takedown · 09:26 AM

The 100w is rated differently than any brushless motor you guys have on the forum thats used in an r/c. Its all torque like lutach and a few others have stated before and no big amp draw so it spools up very fast and then conserves energy. So it will have gutwrenching power, and the rpm rating doesnt bother me because I have that all figured out. It will be around 4100rpm total with a 14t pinion and a 13t spur "chain driven". I already calculated all this out...