Thread: New Product Model Aero Polaris Ultra ARF
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Old Dec 20, 2012, 09:02 AM
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Northwest Ohio
Joined Jan 2002
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Originally Posted by kingsflyer View Post
My Ultra arrived today in great shape. Wonderful packing job! Parts looked excellent!

I was working on mounting the motor and found a couple of items. NOTE -- I'm not using the recommended motor, so some of these issues may not apply if you use the Model Aero motor.

First, my motor shaft extended out behind the motor mount too far and it hit the plywood motor pylon brace. Rather than cut out the plywood, I shortened my motor shaft.

Second, I measured the distance from the firewall to the end of the plastic cowl and found that I needed 1-7/8" (48mm) for the prop to clear the front of the cowl. For my motor, I needed to add 3/8" spacers for the prop to clear, or I guess I could have cut 3/8" off the cowl.

So far, I'm very happy with my purchase. Now I need to get back to work.

Kingsflyer, we sized the plastic cowl specifically for the recommended 2810-9 motor, while realizing other motors may require some trimming or shimming as yours did.

Can you share what motor you are using? The 2810-9 motor on 4S pulls about 420 watts with an 8 x 4 prop.

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Last edited by Model Aero; Dec 20, 2012 at 10:16 AM.
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