Stratolaunch Carrier Aircraft Completes Fifth Flight with New Pylon

Stratolaunch announced the completion of its fifth flight test of Roc, the world’s largest flying aircraft. The aircraft flew for 4 hours and 58 minutes over the Mojave Desert and reached an altitude of 22,500 feet (6858 m).

The fifth flight debuted a new pylon on the aircraft’s center wing that will be used to carry and release
Talon-A hypersonic vehicles. The hardware is comprised of a mini-wing and adapter that is constructed
with aluminum and carbon fiber skins. It weighs approximately 8,000 pounds and occupies 14 feet of
Roc’s 95-foot center wingspan, allowing for adequate space between the aircraft’s dual fuselages for safe vehicle release and launch. The state-of-the-art structure also features a winch system that will load Talon onto the platform from the ground, expediting launch preparation and reducing the need for ground support. Talon-A vehicles are rocket-powered, autonomous, reusable testbeds carrying customizable payloads at
speeds above Mach 5. This testbed capability enables routine access to the hypersonic flight
environment, which is critical for scientific research, technological development, and component

Initial results from today’s test objectives include:
• Validation of the aircraft’s general performance and handling characteristics, with the addition of
the recently installed pylon hardware
• Continued validation of landing gear operations including door functionality, and alternate gear

“Today’s successful flight validates important hardware improvements to the carrier aircraft,” said Dr.
Zachary Krevor, Stratolaunch Chief Executive Officer and President. “The pylon is a crucial component of our combined launch system, and I am proud of the team’s timely and quality integration work that
occurred since our last test flight. It is through their dedication that we continue to make steady progress toward achieving our next milestones of Talon-A flight tests later this year.”

In addition to testing the carrier aircraft, the team continues to make progress on system integration and
functional testing of two Talon-A test vehicles, TA-0 and TA-1. The team has also started fabrication of a third vehicle, TA-2, the first fully reusable hypersonic test vehicle. The company anticipates beginning hypersonic flight testing and delivering services to government and commercial customers in 2023.