Piper J-3 cub 3d printed - Down sized - question about motor size

[Grezer34]

So I have several 3d printed Piper J-3 cubs that I have 3d printed, for a newbie I am a bit intimated by the size, so decided to print one out of PLA + that was 15 % smaller then the original plans both the servos and engine are going to need to be smaller to handle the plan, I found that the ES9051 servo fits perfect in the wing for the servo's and in the body, so know that these will work just fine, my issue is, how do you determine the motor size right now I have the 1806 flight test radial that looks to be 2280 KV but not sure that this will be enough to get the model in the air. the others I printed with LW PLA, but as this was printed in PLA + the weight is a bit more then the larger plan so not sure if there is a smaller motor that will be able to power the smaller plan. I dont know how to determine what would be needed for the weight of the plan for the size of the motor.

 

[Mr Man]

Normally, Larger Planes are easier to fly. If I were you, I would just stick to the bigger planes.
If this is your first Plane maybe consider building a Simple Scout, Tutor, or Simple cub instead, as they would be a better starting plane.

 

[quorneng]

Making a plane smaller and heavier is a receipt for disaster.
With a higher wing loading it will actually have to fly faster than the bigger original and could well need more power not less! It goes without saying the faster also means it will crash harder too.
The suggestion by Mr Man to build and fly a FT "simple" and robust design first is sound.