Stratolaunch has acquired a Boeing 777-200ER as it expands its carrier aircraft fleet supporting the company’s Talon-A reusable hypersonic flight-test vehicles.
The aircraft will be modified to enable Talon-A vehicles to be air-launched from its fuselage, with the work expected to be completed in 2027. The addition gives Stratolaunch a third carrier aircraft alongside its existing Spirit of Mojave and Roc platforms.
The Boeing 777 acquisition is aimed at increasing Stratolaunch’s flight-test capacity and providing greater flexibility for global hypersonic test operations. The company expects the three-aircraft carrier fleet to increase overall flight capacity by approximately 35%, while supporting parallel missions and reducing scheduling constraints.
The modification programme will be a key element of integrating the 777 into Stratolaunch’s specialised flight-test infrastructure. The aircraft will effectively serve as a reusable first-stage platform, carrying the autonomous Talon-A vehicle to altitude before its release for hypersonic flight testing.
According to Stratolaunch, the air-launch approach provides greater deployment flexibility and allows test vehicles to operate across a wider range of mission profiles compared with conventional ground-launched systems.
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The acquisition follows a series of recent milestones for the company. Stratolaunch said in July 2026 that it had completed more than 10 successful hypersonic flights with Talon-A. Earlier this year, it also announced a US$90.8 million contract under the MACH-TB programme for air-launched hypersonic capability test vehicles.
For MRO and aerospace operations, the 777 programme represents the conversion of a commercial widebody platform into a specialised carrier aircraft, requiring structural and systems modifications to support air-launch operations. Once operational, the aircraft will add capacity to Stratolaunch’s growing flight-test and support infrastructure.
