2 blade or 3 blade props???

[ram1000]

I'm building a 250 quad copter and want to use it primarily for a training excersize. I' hoping to make it fly very easily and wondered whether I should install 2 blade or 3 blade props with that purpose in mind.

 

[Jackson]

Buy them both, props are cheap enough. Part of the fun is in experimenting. In general you may find the 3 blades smoother, but with less runtime.