Three bladed carbon fiber props?

The more blades you have, the slower the rotor disk has to turn to get the same amount of lift...

The old Huey pilot.

You need to consider the blade pitch too. 3-bladed props can be designed to give the same amount of lift per RPM as 2-bladed if the the pitch is reduced.
 
take a look on u tube they are extremely unbalanced not worth it.i used them on my P2.and when i flew it the vibration was so bad.it fudged up the imu.i had no controll and it wanted to fly away.it basically did what ever it wanted todo.then finally it came down to about ten feet and i had to kill the power to get it to land.the esc cant compensate for a triblade.good luck
 

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