NASA's X-57 Maxwell validated the core aerodynamics of distributed electric propulsion while revealing the systems integration challenges that will define the next decade of electric aircraft development.
VectorThe North American XB-70 Valkyrie was America's most technically advanced Cold War bomber - capable of Mach 3 at 70,000 feet but cancelled before entering service.
TaildraggerDARPA's X-65 reached a key assembly milestone in June 2026 as its fuselage was mated to wings that carry no ailerons, rudder, or elevators - only pressurized air.
TowerTen ambitious aircraft programs that were cancelled before production, from nuclear-powered bombers to forward-swept wing fighters.
Tower