T-6A Texan II – Motor Selection

To continue on with my T-6A Texan II Build Log, I am in the process of determining the appropriate electric brushless motor.  There is a lot of science around selecting the best electric motor for specific applications and, I must admit, I am still learning.

This aircraft is designed for a .75 to .91 cu in 2-stoke engine or.91 to 1.00 cu in 4-stroke engine.  I am estimating the flying weight to be 9.5 pounds.

A good starting point for sizing electric brushless motors is to use the following:

150 watts per pound Scale Flying
200 watts per pound Aerobatic/3D Flying

Since this is a military aircraft, I am basing my initial calculations on 150 watts per pound. With that said, 150w X 9.5 = 1425 total watts.

There are many electric brushless motor, battery and prop combinations that can be used.  So many that it can be confusing.  So any input is greatly appreciated.

UPDATE – I’ve made my decision.  I’m going with the E-flite Power 90, 8S 5000mAh batteries and 16×8 prop.  This will produce 1800 watts max. which is plenty of power for this aircraft.

Options I am looking at right now are:

MOTOR/PRICE RPM/Volt (Kv) WATTS CURRENT CELLS RECOMMENDED PROP
E-flite Power 90
$129.99
325Kv 1800 50amp
65amp max.
6S to 8S LiPo 16×8 to 18×8
E-flite Power 110
$139.99
295Kv 2000 55amp
65amp max.
8S to 9S LiPo 17×8 to 19×10
Hacker A50-16L-V3
$169.00
265Kv 1862 80amps
100amps max.
8S 16×8

I feel any of these motors would work well in this aircraft.  If you have any comments or recommendations, please leave them!