Here we go again. Folks at MIT are proposing a low-drag low-boom supersonic aircraft, but this is a head scratcher to me:
Through calculations, Busemann found that a biplane design could essentially do away with shock waves. Each wing of the design, when seen from the side, is shaped like a flattened triangle, with the top and bottom wings pointing toward each other. The configuration, according to his calculations, cancels out shock waves produced by each wing alone.
However, the design lacks lift: The two wings create a very narrow channel through which only a limited amount of air can flow. When transitioning to supersonic speeds, the channel, Wang says, could essentially “choke,” creating incredible drag. While the design could work beautifully at supersonic speeds, it can’t overcome the drag to reach those speeds.
If the design “lacks lift” (which it does — that’s the problem with a Busemann biplane) how does it “work beautifully at supersonic speeds”? What holds the airplane up?
Anyone? Anyone? Bueller?