Ursa Major’s Draper Engine Sets New Benchmarks in Hypersonic and Space Propulsion

Ursa Major has revealed the successful completion of both ground and hotfire testing for its cutting-edge Draper hypersonic rocket engine, marking a pivotal advancement in their propulsion technology efforts.

Conducted at their Berthoud, Colorado facility, the Draper engine highlights innovative engineering and swift development progress, establishing fresh industry benchmarks.

Advancement and Trials of the Draper Engine

The Draper engine delivers a thrust of 4,000 pounds through a closed catalyst cycle and runs on a storable, non-cryogenic fuel, enhancing its suitability for space-based propulsion. This fuel choice allows it to perform orbital maneuvers without exhausting all available propellant, facilitating extended mission capabilities.

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Using a fuel that doesn’t require specialized cryogenic storage enables missions with longer dwell times and multiple engine firings while simplifying operational logistics.

Ursa Major’s ahead-of-schedule milestones demonstrate their engineering skill and the success of their accelerated development strategy. Crucially, the program has been supported by a close collaboration with the Air Force Research Laboratory (AFRL), which has provided both funding and critical technical insight.

This collaboration has proven essential in advancing the Draper engine from design into successful testing, underscoring the value of public-private partnerships within aerospace innovation.

Brad Appel, Chief Technology Officer, expressed enthusiasm about the rapid progress, emphasizing the engine’s promising applications for hypersonic flight and in-space maneuvers.

The Draper’s design builds on the proven architecture of Ursa Major’s Hadley engine, blending the benefits of storable solid rocket motor propellants with the controllability and throttle precision of liquid propulsion systems.

This fusion delivers the maneuverability and operational versatility necessary for emerging hypersonic defense missions, providing a flexible propulsion option adaptable to varied requirements.

Impact on U.S. Defense and Hypersonic Technologies

The Draper engine is expected to strengthen U.S. hypersonic capabilities, filling critical operational needs and counteracting developments in adversarial anti-satellite technology. By enabling effective hypersonic threat simulation, it plays a strategic role in sustaining U.S. technological dominance.

Its capability to maneuver in orbit without quickly consuming fuel supports prolonged defense operations, offering continuous coverage in contested scenarios.

Dr. Shawn Phillips, Chief of AFRL’s Rocket Propulsion Division, lauded the program for delivering a highly versatile storable propellant engine on an accelerated timeline. He noted the importance of this achievement in responding to calls from U.S. Air Force and Space Force leadership for rapid capability development and stronger industry partnerships. Draper’s creation represents both a technical milestone and a strategic edge in space and hypersonic technology leadership.

The Draper engine’s success highlights the importance of propulsion systems that combine power, efficiency, and adaptability to accommodate diverse mission demands in a dynamic threat environment.

Its unique blend of storable fuel, significant thrust, and precise control offers a tailored solution for a wide spectrum of missions, from intercepting hypersonic threats to extending the operational lifespan and maneuverability of space vehicles.