In the middle of WWII, engineer Charles Zimmerman built one of the strangest aircraft ever to take flight - the Vought V-173 “Flying Pancake.” With its flat, circular wing and twin massive propellers, ...

In the 1960s, a group of young Sukhoi engineers sketched out one of the strangest aircraft ever imagined — the Shkval, a fighter with four wings in an X shape, twin engines for vertical takeoff, and ...