Firefly Aerospace Sets New Standard for Engine Development with Rapid Progress on Miranda Propulsion System

Firefly Aerospace has completed the first hot fire test of its Miranda engine, a turbopump-fed propulsion system designed for the Antares 330 and Medium Launch Vehicle (MLV). The test was completed just over a year after signing the initial contract and validates the design of the startup sequence, transient conditions, and tap-off engine architecture. Firefly is now building up to a full-duration, 206-second Miranda hot fire and plans to power the first stage of Antares 330 and MLV. The company is also designing and manufacturing the first stage structures for Antares 330 and the structures and fluids systems for MLV stages. Firefly Aerospace is an end-to-end space transportation company with launch, lunar, and in-space services. The company is headquartered in central Texas and is focused on delivering responsive, reliable, and affordable space access for government and commercial customers. The first flight of Antares 330 is scheduled for mid-2025, and MLV is expected to launch in late 2025.