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ESC and motor matching

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Old 02-11-2013, 06:24 PM
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overhall
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Default ESC and motor matching

I am new to this whole electric scene and I know you need to match the motor to the plane, battery, and ESC. I was looking for some options for the Tower Hobbies Razor 3D I plan on using 2 3S packs in series. All that I know is that Tower gives me one option, but I wanted to look at other options and gain a little knowledge on the subject.

[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXASMG]Tower Hobbies Razor 3D GP/EP ARF 52"[/link]
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Old 02-11-2013, 06:38 PM
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Default RE: ESC and motor matching

If there are variables that you will not change from recommended then it makes it a lot easier because there will be fewer options.

Are these variables unchangeable?

6s pack
14x7 prop
speed
thrust

If so then we are stuck with the same kv as well and the only option left is the easy one (the esc) It's easy because one only has to select one that has at least the voltage range and current range as will be encountered.
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Old 02-11-2013, 06:45 PM
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Default RE: ESC and motor matching

It is all variable I was just looking if I can find a better setup than what they recommend I would rather have the better setup. If I was choosing between speed or power I would go power
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Old 02-11-2013, 07:00 PM
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Default RE: ESC and motor matching

Perhaps a 15x8 prop would be a simple change, and the current just might be under the esc max. The current goes up a LOT over and above the 14x7

I'm no expert yet , but the combo they recommend looks very good. Maybe a 14x8 would be a touch "better"

The only thing I see that MAY be overkill is the esc (and possibly the motor) , but that's ok. There's nothing wrong with upsizing the esc or the motor (just cost and weight) You can play with numbers and changes all day long such as upping voltage and lowering kv for similar performance.
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Old 04-20-2013, 09:03 PM
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Default RE: ESC and motor matching

Let's see - -
5.5Lb aircraft
3D  150-200W per Lb.
I used 175W
Aprox 1kw

The rimfire motor data sheet did not list max power (watts) or current
I'd use another motor such as an E-Flite power 46 or 52
At least they give you enough data that you can determine what to do.

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