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Which Motor To Use

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Which Motor To Use

Old 04-25-2012, 07:41 PM
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Maylon
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Default Which Motor To Use

I have a new Aeroworks 52” Extra 260 Freestyle QB-L, this plane
and am wondering which of these motors would be good to install in it. The plane will be right at 4 lbs. with battery. And I want unlimited 3D.
I realize they aren’t a Hacker, AXI, Scorpion, or Hyperion, but neither is the price; and I understand you get what you pay for but with that in mind which would be ok?
Also the reasons it would or wouldn’t be good. Trying to learn something here. Thanks for the help.
Old 04-25-2012, 08:30 PM
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Jetdesign
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Default RE: Which Motor To Use

Edit:
Forget everything below - you have a sweet new $250 plane and you're trying to shave $40 off your motor selection? DON'T DO IT! Hackers can be run over their limits, are made very well and have great support! Start with the recommended prop, and prop up until the Hacker is getting warm, or do some research on what people are running. Don't put a garbage chinese motor in a nice aeroworks plane, it's a sin, and is NOT going to give you the great 3D performance you want for very long. It's a $40 difference, that's next to nothing in this hobby. If you can't afford it, wait to build the plane until you can, it will be worth it.




The process I would go through:
1) suggested motor from the aero-works website: Motor Hacker A30-12XL
2) specs from Hacker (aero-model.com): 700W, 700kV, 1.46in (37mm) diameter, 6.3oz weight (176g) (http://www.aero-model.com/Hacker-Bru...-A30-12XL.aspx)
3) it should fly good with the suggested Hacker, so I would only go slightly over the kV, keeping similar weight and diameter (the diameter is a big factor in keeping the motor cool).

Of what you suggested, [link=http://www.valuehobby.com/power-systems/brushless-motors/out-runner-brushless-motor/emax-gt2826-860kv.html]this motor[/link] is basically the same size and weight and rated for more power than the Hacker (whether or not you can run it that hard and have it last, well, there's a reason it's not the same price as a Hacker).

So, this motor, with the same batteries and same prop, will give you more power due to the higher kV. You can theoretically prop it up, too, since it's 'rated for higher power'. HOWEVER, this motor looks like it's made out of a recycled soda can and used chewing gum.

The 920kV motor will force you to prop down. You really get better performance (efficiency) if you use lower rpm, higher pitched prop.

The other motor (800kV) looks a little more robust. It's a little heavier, which again helps deal with cooling.

What would I do? Buy the Hacker. It would be a darn shame to stick such a crappy motor in a sweet Aeroworks plane. You are probably going to smoke one of these motors in a matter of flights, if they even perform enough to get you off the ground. There is a reason they are $30.
Old 04-26-2012, 11:39 AM
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Jetdesign
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Default RE: Which Motor To Use

Good places to save money:
Sky lipo batteries from hobbypartz.com; free shipping over $50.
Hobbico servos from Tower Hobbies; made by hitec and/or Futaba and bulk discounts available.
EBay: Phil's Hobby Shop has good prices, good service, and ships cheap.
Old 04-26-2012, 05:37 PM
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Maylon
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Default RE: Which Motor To Use

ORIGINAL: gaRCfield

Good places to save money:
Sky lipo batteries from hobbypartz.com; free shipping over $50.
Hobbico servos from Tower Hobbies; made by hitec and/or Futaba and bulk discounts available.
EBay: Phil's Hobby Shop has good prices, good service, and ships cheap.
Thanks Joe for your lengthy informative reply (the 1st one), I appreciate youir insight.
Also thanks for your 2nd post (this one). I found Hobby Partz a couple of years ago and
buy all my batteries (Sky Lipo's) from them. Been buying from tower since at least
1979, can't remember if I used them when I first started in RC in in 1972 ha ha.
Have added Phil's Hobby Shop to my "favorites" file. Just started rebuilding that since I had a computer crash
and lost over 1 1/2 pages of favorites just about RC stuff.
Thanks again


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