Trigonal Planar: It might help if you asked a little nicer. Your OP sounds more like a demand than a request, and your subsequent messages seem to have a little attitude to them as well.
You’re really not giving enough information to get good answers. The correct prop pitch really depends on the usage, the airframe its being attached to, etc.
I’ve never actually designed propellers, so I’m basically guessing at the rough parameters of the design. So take this with a grain of salt, but here’s the approach I’d take:
For heavy lift, you’ll want to design an airplane with a big, high lift wing, flying at a slow speed. Once you’ve calculated the best L/D for the airplane, you’ll know what speed you will be flying at. From that, you can size your propeller. The pitch of the prop on a model, if I recall correctly, is the measurement of how many inches the prop would move forward in a full revolution, neglecting slip. Off the top of my head, I think you’d want to look at the power curve for your engine, and find out the RPM for max power. Once you have the RPM you’ll be turning, and the speed you want to fly at, you can calculate the theoretical pitch you need. Then you have to calculate propeller size, and I’m thinking that’s going to be more trial-and-error. Basically, you want the biggest prop you can turn at the RPM you need. Go too big, and the engine will lug and not make rated power.
From that rough guide, you could do a lot of fine tuning. Perhaps you want to go to a slightly bigger prop and slightly less RPM and more pitch to get better prop efficiency. Maybe you want to go the other way. Then there will be slip, so maybe you want a slightly smaller prop with a coarser pitch to maintain best L/D at max power.
Perhaps the easiest way to do this, since model props are so cheap, would be to buy a range of propellers of various sizes and pitch according to the engine manufacturer’s recommendations, and fly them. Collect some data, draw some curves, and optimize your design.