RE: 3 Bladed prop for OS 160
Rufus,
I use a APC 15.75 x 13 repitched by Dave Lockhart to 15.75 x11. Works very well.
Another off the shelf prop to try is the 2 blade 18.1x10W that APC introduced. You might have to order direct from them. Be sure to note the "W" at the end of the size.
Jon Lowe