The Scaled Composites Model 281 Proteus is a tandem-wing high-altitude long-endurance aircraft designed by Burt Rutan to investigate the use of aircraft as high-altitude telecommunications relays. The
Proteus in flight in 2002 in the Department of Energy's Atmospheric Radiation Measurement – Unmanned Aerial Vehicle (ARM-UAV) Program
Proteus flies over the Tehachapi Mountains with the MP-RTIP radar pod
Orthographically projected diagram of the Scaled Composites Proteus
The Scaled Composites Model 351 Stratolaunch, or "Roc", is a solitary testbed aircraft built by Scaled Composites for Stratolaunch Systems to carry air-launch-to-orbit rockets, and subsequently repurp