Footage appears to show aircraft larger than football field soaring over Calif.

"Described as the world's largest flying aircraft, Roc - which looks like two 747s fused together and has a wingspan larger than a football field - recently completed a series of test flights last year, where it reached an altitude of 35,000 feet. Named after a large bird of prey from Arabian folklore, the unique composite aircraft has six engines, a 385-foot wingspan, and a takeoff weight of 1.3 million pounds."

"According to Stratolaunch's website, the legendary bird was so large, it could carry elephants and transport sailors to safety. Similarly, it appears that the 21st-century iteration is designed to carry another Stratolaunch aircraft, the fully autonomous Talon-A2, which is capable of reaching hypersonic speeds when released into the air - that's five times the speed of sound. Photos show the enormous plane taking off from the Mojave Air and Space Port at Rutan Field, an aerospace testing center in the high desert."

Roc is an experimental composite aircraft built by Stratolaunch with a 385-foot wingspan, six engines, and a 1.3 million pound takeoff weight. The aircraft recently completed a series of test flights reaching 35,000 feet and appears intended to carry the fully autonomous Talon-A2, a vehicle capable of hypersonic speeds when released in flight. Roc operates from the Mojave Air and Space Port at Rutan Field, a long-standing aerospace testing center that hosts more than 60 aerospace companies. The design evokes very large twin-fuselage aircraft and connects to airborne launch concepts for supersonic and hypersonic flight testing.

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