The Journal of Space Commerce

The Journal of Space Commerce

VR35K-A Upper Stage Engine Development Contract Awarded

Tom Patton's avatar
Tom Patton
Aug 17, 2023
∙ Paid
Share

The US Department of Defense has awarded a contract to Sierra Space for maturation of its VR35K-A upper stage engine. The firm-fixed-price contract is valued at $22,605,083.

"Once complete, the VR35K-A will allow our launch vehicle teammates and partners to deliver up to 30% more payload mass to orbit."

Rusty Thomas, Sierra Space

Sierra Space completed a 1…

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