YS 45 performance
Hideho and welcome to the world of YS's.
Gotta love em'.
OK, so the first thing one realizes about YS's is that like a wee smaller prop. 11X4 or 5 APC depending on your plane, like a funfly.
11X6 or 7 for a sport aero. 8 for speed.....
They like to spin up quicker than most. Stay away from the 12's on the YS 45's...I have a few of them, BTW.