what is the best prop to be used for the Hanger 9 Tripute with 36 evolution engine ? ?? for speed not 3d flight ?

9x6

is it a 36? or a 46 engine?, if its a 46 you can go for a 9x8. remember apc props only, and if you balance them you can get an extra 200 rpm

This is a trick question...right?!
My Tribute's rudder starts to flutter when it gets going "fast"...

I'm using a 12 X 4 APC on an O.S. .46FX w/ Tower muffler...14,000+ on 15% (straight up like a rocket...but I don't use WOT in level flight for more than a couple of seconds )

To answer your question...I'd say the 9 X 6 (or maybe 9 X 7 ) would work, but don't expect much in the way of speed from that thick winged, draggy airplane...