mamba max brushed

[GriffinRU]

Originally Posted by Serum

You could get a purple fegao, and polish it till it's silver.. That's some work too.. :p

Just get a brushless motor, no matter what you do with a brushed, brushless will outpreform it in terms of efficiency and most likely torque..

With 4S you need am external BEC (or a loose battery)

I will be carefull with torque...

Artur

P.S Recently got plettenberg 355 for testing...

[jollyjumper]

for me, its like mamba max is an on or off motor. so far it does seem like that.

[Serum]

Artur; take a BL motor of that size, and see how that preforms in terms of torque.. but i covered myself with this sentence 'and most likely torque'

Largest brushless motors i know of, are in a 933ft tall ship, they actually push the entire ship.. All the fossil fuel engines are used to feed the generators. talking about lots of megawatts..

[jollyjumper]

:rolleyes:

[GriffinRU]

Originally Posted by Serum

Artur; take a BL motor of that size, and see how that preforms in terms of torque.. but i covered myself with this sentence 'and most likely torque'

Largest brushless motors i know of, are in a 933ft tall ship, they actually push the entire ship.. All the fossil fuel engines are used to feed the generators. talking about lots of megawatts..

Rene, you safe with "most likely" just sometimes it is enough for somebody to make wrong decision based on such comment. Let's be true to the physics and mechanics, its all about maintenance and lifespan, but if you want torque then brushed motor is the one you want...
So back to RC that is why there are lots of guys here and there still enjoying brushed setups, while BL offers power and almost trouble free operation. While it is very difficult to find 550-can with neodymium magnets ... :)

Artur

P.S. 355 has many poles (like outrunner) 3-4 poles covered by one brush at given time, so torque won't be a problem.

[jollyjumper]

i was wondering now if any of you guys have torque ratings of any motors?
i know some of the trinity's(540's)
it would help me alot if i know what i would need to push the 4 kilo trucks around.

[GriffinRU]

Originally Posted by jollyjumper

i was wondering now if any of you guys have torque ratings of any motors?
i know some of the trinity's(540's)
it would help me alot if i know what i would need to push the 4 kilo trucks around.

It is quite simple Kt=(Kv/1000)*1.345 (oz-In/A)

Artur

[jollyjumper]

hmmmmm
so how would i convert oz-in to newton-mm then?
thanks.

[Serum]

100 oz/inch is about 71 N/cm

1oz is about 28 gram, and 1" is about 25.4 mm..

[jollyjumper]

ok, i found a converter online.
i calculate kt value of mm 5700 and with that i do some more work and get to 1600 newton millimeters @ 30 amps. a average 19 turn has 130 Nmm of torque at unknown amps.

[Serum]

160n/cm? i think there is a small error.. 16n/cm would be closer..

Originally Posted by Serum

160n/cm? i think there is a small error.. 16n/cm would be closer..

Serum form what i can tell his measurements are in newton millimeters while you are measuring in newton centimeters maybe im wrong, its just a guess

[Sylvester]

Originally Posted by boss 302

Serum form what i can tell his measurements are in newton millimeters while you are measuring in newton centimeters maybe im wrong, its just a guess

I think your right.

[coolhandcountry]

1600 nmm is same as a 160 ncm

[jollyjumper]

ah yes, i made a mistake, sorry bout that.:035:
it is 160Nmm. :027:
that seems alot more realistic.