Originally Posted by prototype3a

I ran 3x VTX 697 on a heli blade test rig using the Align head but I never ran them up to "3d" headspeeds as I was more interested in using them for heavy lift "drone" use.

I can say, I did see some interesting trends on them compared to more traditional blades.

FWIW, the Align 3 blade head is essentially rigid and had some really weird vibration issues whenever you gave it any sort of cyclic input making it unsuitable for aerial videography. I remember looking at the Goblin 3 blade head design but I can't remember what if any conclusion I had were. I have been waiting for MSH to release their 3 blade head as I suspect it will actually fly properly.