Yes I did/ do a number of reviews for 3D Flyer - th EDGE is a good flyer
And I read Jason's review --
3 bladed props get some really interesting commentary.I was a bit puzzled by some of his comments.
Our own finding- is that they are not as efficient in these small sizes as two bladed designs (at least all of those I have used ).
But if you have the power to make em pull the model - they are quieter and the reason, may be one never mentioned
Here goes ---------
The blades deliver pulses of air NOT in sync with the exhaust pulses .
We have noted this sound difference in flight on our big gassers and this is an idea I came up with .
The prop blades produce a whup whup sound in sync with two stroke putt putt. and if the three baldes put the putt and whups out of sync - may not the result be some sound cancelling?
Wanna think on that?