Opjose, I here you're the one that can answer my question. I'm trying to determine what size of propeller I need for my current setup. I am new to electrics and have actually been out of the hobby for 30 years! Here's what I've got.

Plane: Sky Raider Mach II, 54" wing span, 5lbs (or less)
Motor: MonsterPower 46 (670kv) OutRunner
ESC: 60A Brushless Speed Controller ESC [Volcano Series]
Battery: Blue Lipo 4-Cell 5000mAh 14.8v 4S1P 25C

Can you help me out? Thanks!