Yes. You need to have very good knowledge about aerodynamics, propulsion, control systems, electronics, materials (aircraft materials, of course. Because they are light in weight and can withstand greater loads), etc. read more
You need to have knowledge in Flight dynamics, Propulsion Systems and control Systems to make yiur Iron man suit fly stable amd in desired direction .And yiu also need to ahve strong knowledge of Physics especially to design the arc reactor that could provide so much energy. read more