I am trying to help a fellow flier who wants to convert his .46 and .60 glow planes to electric.

Need suggestions from people who have actually used HobbyKing motors on large planes about choices of motors for both these sizes.  Specifically, HK seems to have have multiple motors families (like G60, SK3, NTM etc), any direct experience about these would be appreciated.

I have seem one person use this one below on the field, and it seems to work well, but currently out of stock.

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=19617

0.46 engine review
http://www.rcuniverse.com/magazine/article_display.cfm?article_id=1016

So, a 0.46 ci (Cubic Inch)[=7.5 cubic centimeter] engine gives 1.16HP

Therefore a 2KW engine should be sufficient for that.

Now a low KV motor need more turn for less KV.
Now for taking MMF being same, NI (no. of conductor x Current) be same.
Again, as turn increases, current decreases per conductor.
But electrically to keep same power, voltage should be higher. [power = volt x amp.]
Again higher turn gives higher backemf and so supply voltage should be higher.
So, go for a 4-6S motor of low KV. and use maximum voltage supported by the motor, always to take more output.

0.60 = 1.68 HP [at 16000 rpm i. e. 266rps]

Please have a look at: http://www.rcindia.org/for-sale/converting-ready-40-to-electric/msg41934/#msg41934 
it might help?

Kalyan - I was looking for real life usage experience...  theory is easy in most cases.  Build quality of various models of motors is what I am really after.