A Better Harrier?
How much more mileage is there in the Harrier design?
Kingston did propose a tin wing "Harrier GR5" in the early 80's before the AV-8B was selected. From memory it looked like a GR3 with a bigger wing. Did that offer any improvements performance wise?
I had heard that the AV-8B aerofoil is less than optimum due to CFD taking a wrong turn at the time it was designed.