US hypersonic aircraft to soar at Mach 5+ with new upgraded engines

The U.S. aerospace company Ursa Major has secured a $32.9 million contract to supply 16 upgraded Hadley H13 rocket engines for Stratolaunch’s Talon-A hypersonic test vehicle over several years. These new engines are designed to be more reusable, supporting more flight starts and thus reducing the cost per test. The H13 engine is an evolution of the existing Hadley engine, featuring advanced metals and an oxygen-rich staged combustion cycle that provides higher thrust (5,000 lbf) and longer operational lifespans. This upgrade aims to enhance Talon-A’s performance and durability, facilitating more frequent and cost-effective hypersonic flight tests. Talon-A is a reusable hypersonic vehicle capable of flying at speeds exceeding Mach 5 and is air-launched from Stratolaunch’s large carrier aircraft. It serves as a Pentagon test platform for military hypersonic technologies and recently completed its second successful Mach 5+ flight test in May 2025. The