RE: Turnigy motors from hobbyking
I have 2 of the 35-36-1400 motors, and they are pretty decent, especially for the price. However, as Dr. Kiwi says, I wouldn't try to run it at 550 watts. I run mine very hard on 3S with a 10X7E prop, and pull a constant 325-350 watts, and it performs excellent, but I really don't think I would push it too much harder. I did test run one on 4S with a 9X7.5E prop on my GP P47, and it hauled, *****, but it really pushed the motor hard.
I will say this though, the 35-36-1400 is a thirsty motor, be sure you have a decent capacity pack with it. A 3S 2650ma pack only lasts 4 1/2 to 5 minutes, only pushing it moderately.
The AUW of that plane is expected to be around 2.6lbs, I would recommend probably the 35-42-1250 instead. You would be able to run it on 3S, and should perform pretty well.
Put a drop of household oil in the berings before you put it together, it will last longer if you do.
As far as the magnet issues, it's mostly the larger motors (50mm and up) that seem to have issues. I have a 50-65-350 that had magnets come loose. I returnd it, and they sent me another one that is good.
I have many Turnigy motors, from the 35-30-1400's, all the way up to the 50-65, and all are decent for the money. They do have bearing issues though, as long as you oil them, they work fine.