I have been flying 1.20 size pattern planes for 2 seasons now. I started with a 10 pitch on a 2-stroke and moved to a 12 pitch on a 4-stroke YS, and now am flying a 12 pitch on an electric motor. I like the higher pitch as it gives a pretty good ground speed at lower throttle, leaving plenty of reserve for verticals to maintain constant speed.

I am trying to learn about prop stalls though; seems that when I enter the higher pitch props into the motor calculators, it warns of a loss of thrust due to the prop stalling. It makes sense since a prop is basically a rotating wing and higher pitch is a high angle of attack, and there's only so much AOA a wing can handle before it stalls. Once I get a little more settled this season I might start experimenting with the calculator and props to see if I can see or feel what it's talking about.