I want to design a UAV to fly at faster cruise speeds than usual. Setting aside the powertrain selection, which will probably be a big part of this, I want to know what kind of design choices I can make that would make this aircraft more efficient at faster speeds, vs designing a traditionally efficient aircraft (Fly it wherever the L/D is the highest) and flying it faster.
From what i understand, wherever the max CL/CD is at is the most efficient aoa/speed to fly at. How would we design an aircraft to solve max cl/cd for a certain speed? i.e., if i wanted to design an aircraft to cruise and be its most efficient at, say, 130mph instead of 60mph. Is there design choices that'd make it more efficient at those speeds (Low lift airfoils, picking airfoils for the right RE numbers, etc), or is this as simple as making an aircraft with a high CL/CD and making it fly at faster speeds?