It improves down line braking and is much quieter than a 2 blade. It also gives a smoother transition from slow to fast. It helps with a touchy throttle. Gives you the feel of only 3 speeds. slow medium and fast.

It is an APC 15.75 x 13 repitched to a 15.75 x 10 I turn about 8100 - 8300 RPM.

Carl