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US Lags Behind In Hypersonics, Ursa Major Offers Solution

December 3, 2025

2 min read

Key Takeaways

US potentially lags behind Russia and China in hypersonics.
Ursa Major's storable liquid rocket engine offers improved maneuverability.
Engine can start, stop, and throttle for better survivability.
Modular design uses advanced 3D printing techniques.

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Strategic Implications

This technology may indicate a shift in the US approach to hypersonic propulsion, suggesting a focus on flexibility and maneuverability. The use of storable liquid rocket engines could provide a competitive advantage, potentially altering the balance of power in hypersonic development. Ursa Major's advancements may signal a new direction for the US military in addressing peer and near-peer adversaries.

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What Happened

American-Made Storable Liquid Rocket Engine Technology Advances

The US is potentially behind Russia and China in hypersonic technology, but Ursa Major’s American-made storable liquid rocket engine technology offers advantages over traditional propulsion methods. The engine provides improved maneuverability and survivability, with the ability to start, stop, and throttle. Ursa Major CEO Dan Jablonsky discussed the company’s capabilities and the US Air Force’s Angry Tortoise-Draper powered hypersonic program. The technology was first reported by Breaking Defense.

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