Scaled Composites Model 401

Twin Jet

The Scaled Composites Model 401 is an experimental twin-jet research aircraft developed by Burt Rutan's legendary Mojave-based aerospace company, known for pushing the boundaries of unconventional aircraft design. Built in the mid-2000s, the Model 401 served as a testbed for advanced aerodynamic concepts and systems integration, continuing Scaled's tradition of rapid prototyping for both commercial and defense applications. The aircraft features a sleek, low-wing configuration with twin jet engines, representing a departure from many of Scaled's earlier composite pusher designs. With a maximum takeoff weight around 7,000 pounds, the Model 401 occupies the light jet category and was designed for high-speed research missions rather than operational service. Scaled Composites has historically maintained tight operational security around its experimental programs, and the Model 401 is no exception—detailed performance specifications remain largely unpublished. The aircraft has been observed operating from Mojave Air and Space Port under experimental certification, where Scaled continues to develop cutting-edge aerospace technologies ranging from suborbital spaceplanes to high-altitude reconnaissance platforms. SkyMeter has tracked flights across airframes and operators, with the sole observed operator.