Mojave air and space port

The company said the test craft, part of its Talon-A product line, reached supersonic speeds approaching Mach 5.

Stratolaunch test flies the world’s largest airplane—by many metrics—with a view towards air-to-launch operations.

Test flight crews for Stratolaunch’s Roc shortened their mission Thursday after a malfunctioning sensor near the airplane’s left elevator on the left fuselage.

Stratolaunch’s Roc, the world’s largest airplane, made its fourth test flight Thursday over California’s Mojave Air and Space Port with a mission of fully operating all landing gear in flight for the first time.