section_path: Launch vehicles/Eclipse/Current design
section_name: Current design
paragraph_text: Current design
  
  Since its announcement in August 2022, the MLV design has undergone several revisions. Renamed to the Medium Launch Vehicle, or MLV, the rocket is now 4.32 m (14.17 ft) in diameter with 7 Miranda engines on the first stage and 1 Vira engine on the second stage. It will be capable of delivering over 16,000 kg to LEO in a 5 m (16.4 ft) fairing. The first MLV launch is scheduled for the second half of 2026 from Wallops Flight Facility in Virginia. MLV will initially be expendable but will eventually "incorporate first-stage reusability." In April 2024, the company reported on social media that it was progressing and on track with Miranda engine testing for the MLV. In mid-2024, the company added that the MLV's first stage is being architected for return to launch site landings, and hope to have the technology refined by flight 6 of the vehicle. In May 2025, Firefly and Northrop Grumman announced that MLV would get renamed to Eclipse.