The best thing is to learn how to do the relatively simple math involved.

I just answered an almost identical question on this thread: [link=http://www.rcuniverse.com/forum/m_9124560/tm.htm]Click me![/link]

BTW: I also ordered that plane...

With an expected weight of 5.7lbs I'm looking for about 140-150watts per pound performance.

That works out to...

5.7lbs x 150watts = 855 watts

So you are right in the ball park with your 1000watt max motor. You should get GREAT performance.


BP's site says:

"Use this motor with 4-6 cell Li-Poly packs and 11-13 inch props on planes up to 8 lbs flying weight. We suggest propping for around 800 watts continuous. Manufacturer suggests a 12 x 8 prop on 5 cells or 13 x 11 on 4 cells. "

I would do as indicated, and put a good watt meter on the plane, to see where your power system comes out.

If you are drawing less than 800 watts, increase the prop size and pitch. If more decrease it.

Rememeber that the higher the voltage goes, the more current draw, which you need to offset by DECREASING your prop diameter and/or pitch...

Also, assuming you go with a 12 x 8 prop on 5 cells...

3.7v x 5 = 18.5v

800 watts / 18.5v = 43A so you'll need an ESC capable of at least 45A @ 18.5v.

Most ESC's are rated at 11.1v, and as you increase the voltage, the rated amperage the ESC can handle DROPS...

I will be using at least a 60A ESC as a result.

Also remember that most ESC's which have on board BEC's, have "linear" ( aka ANALOG ) becs unless they specifically say otherwise.

Analog BECs really cannot handle more than 11.1v and even then their performance is MARGINAL.

You'll need to either purchase ESC's with SWITCHING BECS ( a more expensive proposition ) or use a separate BEC capable of dealing with the higher voltage ( a MUCH cheaper and what I normally do ).