The Journal of Space Commerce

The Journal of Space Commerce

Test Campaign on New Vortex LOX LH2 Engine Completed

Sierra Space Also Secures Follow-On $16 Million Contract with U.S. Air Force

Tom Patton's avatar
Tom Patton
Feb 19, 2025
∙ Paid
Share

The test campaign for the Sierra Space fully integrated VR35K-A upper stage engine, under contract with Air Force Research Laboratory’s (AFRL) Rocket Propulsion Division at Edwards Air Force Base has been completed. The milestone marks a major step forward in Sierra Space’s development of advanced propulsion systems.

“Our powerful new upper stage engine…

Keep reading with a 7-day free trial

Subscribe to The Journal of Space Commerce to keep reading this post and get 7 days of free access to the full post archives.

Already a paid subscriber? Sign in
© 2025 Ex Terra Media, LLC
Privacy ∙ Terms ∙ Collection notice
Start writingGet the app
Substack is the home for great culture