How accurately is body lift calculated in FAR? For a while I have been using a design(Below) where I rotate Mk2 fuselage until they blend together to form an almost perfect shaped lifting body. Is the shape being calculated to give me wing type lift or is it just giving me generic body lift based on the amount of fuselages I have? As you can see, the body is blended together to make an almost perfect lifting body. Is this accurately calculated or am I just making my plane blunt and more susceptible to drag? p.s. This craft in question doesn't want to stay nose first. When re-entering the atmosphere, at around mach 6, the nose either pitches up or down violently and goes engine first and it's impossible to get it going nose first after that. No matter where I move the CoL too, it always flips over engine first. Is it the gull wings or is it the body? I included the FAR analysis if someone more familiar with aircraft/spaceplane design could give me some advice.