Based on various rules of thumb that I've picked up from this forum I've worked up the following power system parameters to power a 65 oz. plane using a 770 kV motor.

Peak power required = 715 Watts
Number of cells = 5
ESC current rating = 50A
Battery capacity = 3300 mAh

Expected battery weight based on power required = 230 grams approximately

Does the above make any sense at all or is it right out to lunch?  Comments?  Anyone?  Anyone?

Unless the motor contemplated is dramatically less efficient than the usual, I don't think it matters much for the capacity calculations.

It may matter as far as motor longevity goes, though.

Nice bit of calcuations, some other ideas:

* KV x voltage --> RPM.  you want to run around 70%-75% of the available RPM with nominal voltage.  With 770 kv you can run 4S and a 6 pitch, or 5S with a 4.5 pitch; either can work, you just need to decide where you want to go.

* Also 5Sx3300 mah is going to weigh quite a bit more than 230g.

* John C gave tood advice, go to List your set-up", I think you will find systems of comparable power range are using either 4Sx3300 or 5Sx2700

David,
Here is a spreadsheet and article I published in Stunt News a year ago.  It'll figure everything you'll need based on the circle ready airplne weight.  Works very well.