I do have a very decent propeller aircraft, though it is my most heavily worked on aircraft to date. Working with propellers has been extremely hard, and often does not work at all in some aircraft. I have yet to make a single prop aircraft work, propellers hardly give enough power while stationary. Increasing it's power tends to turn an entire aircraft into a propeller as well, and adjusting the angle of attack on them drastically lowers the top speed. They also have a bad instability issues when it somehow collides with the airplane, by being push back into the engine.
Propellers are very hard to work with and inconsistent with the results. Along with many stability issues propellers are not very viable at all.
@DioTheCreative hey dio, welcome. Prop aircraft are challenging but not impossible, and rewarding once you get the hang of them. Check out THIS project, I helped another member with who was having trouble with the prop and the craft overall, but its a good starting point to see how to make a prop aircraft viable.
As luck would have it, I just completed a turboprop project last night, it uses jet engines partly for thrust but also the props provide thrust. You can find it HERE.
Otherwise feel free to post any craft youre having problems with, I'd be happy to help! 😊