RE: Biela props??
Chris
I have a 3W-50I that swings a 23x8 Biela around 6100 RPM and my motor pulls a 17.5 lb QQyak54 straight up for a long as you can see it. 3D is very good at that RPM, forward speed is faster with a 3W 22x10 but 3D transitions well with the Biela propeller. I use them consistantly over the Mejzlik on my 3W's.
JDS