Rapid-Built Liquid Rocket Engine Hits Supersonic in New US Test

The Affordable Rapid Missile Demonstrator (ARMD) moved into supersonic territory during a recent flight trial, thanks to a rapidly developed liquid rocket engine.

The demonstrator used Ursa Major’s Draper propulsion system in the test, highlighting its role in validating new engine technology for future missile applications.

Company officials said the flight-ready engine was completed in just eight months, positioning the effort as an innovative step “toward a cost-effective, mass-producible deterrent.”

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