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
|6S to 8S LiPo||16×8 to 18×8|
|E-flite Power 110
|8S to 9S LiPo||17×8 to 19×10|
I feel any of these motors would work well in this aircraft. If you have any comments or recommendations, please leave them!