I want to build something similar to this
but with two holes in the wing, where I want to put two propellers. But I need to make the proper calculations (shape and size of the wings, I'll work on the propellers separately). It should be a simple design, just a prove of concept.
Is there a software that can help me do this? I can have an idea of the weight I need to lift, the velocity, and need the design (with the two holes).