Jay, please notice that it is not my project but Peter's (user Acrojet), I was merely commenting an information provided on this thread. In terms of scaling, the KAI FA-50 is basically a lighter weight 85% scale F-16. Flies fine, has solid supersonic performance, weighs tons more than Peter's plane. At 900 lbs empty mass and 2100 lbs MTOW, the wing loading of such an aircraft is still very low even if he'd further reduce the wing area. At 60% the aircraft is still pretty huge and at the planned MTOW he could do fine even in a 50% scale. You are right about the giant inlet below the fuselage, it would ingest debris, gravel, dust and dirt from airfield runways. Your suggestion about a split inlet like on the FA-50 might indeed be a better solution, it's a good idea and up to Peter to see. I heard a rumor that the side inlets on the FA-50 was a suggestion from Lockheed Martin or some other American experts working on the project, to reduce the water/dust/dirt ingestion on wet runways that used to be a problem on the F-16 original design. This would also ease the design of the front retracting landing gear, so the FA-50 is indeed an F-16 with most design flaws resolved.