# How do you maximize an electric engines thrust?

I‘ve been recently looking for answers to this question on the internet but the jungle of propellers, fans and electric motors didn‘t quite get me an anwer. How would I have to design an electric engine to produce as much thrust as possible on an area as small as possible, so the thrust/area ration should be high. Also, assume there‘s enough power available. Would I use propeller and if so, how many blades ? Would I use a fan like the turbofan of a jet engine ?

With the optimal solution, which thrust do you think a 500 mm prop/fan could produce ?