A solid fuel ramjet ignited and held thrust across its intended operating envelope, validating the design for tactical missiles.
L3Harris has reached a key milestone in next-gen propulsion, successfully testing its solid fuel ramjet propulsion system at full scale for the first time.
During the test, engineers ignited the propulsion system and operated it under flight-like conditions, validating its performance across its intended operating envelope.
Early results showed propulsion levels matched expectations, keeping the technology on track for a future tactical missile demonstration.
With key characteristics confirmed, L3Harris is scheduling more ground testing using critical validated data.
“This test is an important step in proving solid fuel ramjet propulsion can deliver the speed, range and affordability our customers need,” said Scott Alexander, president of Mission Propulsion at L3Harris.
“We are reducing risk now so we can move faster toward a scalable capability for the warfighter.”
Unlike conventional rocket motors, solid fuel ramjet engines draw in atmospheric oxygen instead of carrying an onboard oxidizer, reducing the number of moving parts while sustaining high-speed flight.
This approach is intended to simplify manufacturing, lower costs, and withstand extreme operating conditions without the overheating issues associated with some traditional propulsion systems.
L3Harris said the next-gen technology could expand the capabilities of advanced weapon systems while helping close what it describes as a critical gap in performance and affordability for US and allied forces.
“We are answering the Department of War’s call for longer-reach, more capable, lower-cost propulsion that is producible at the scale needed,” said Joel Warhurst, Business Development Director at L3Harris.
“We are designing for manufacturing, performance and production capacity with a straightforward goal of more speed, more range at a cost point that supports affordable mass.”
© 2026, GDC. © GDC and www.globaldefensecorp.com. Unauthorized use and/or duplication of this material without express and written permission from this site’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to www.globaldefensecorp.com with appropriate and specific direction to the original content.
