Chris Bergin - NSF on X: "These BE-4 Flight Engines have been a long time coming. Clearly, Blue Origin has achieved the confidence level they can perform for the expendable Vulcan. The
![File:Blue Origin BE-4 rocket engine, sn 103, April 2018 -- LOX inlet side view.jpg - Wikimedia Commons File:Blue Origin BE-4 rocket engine, sn 103, April 2018 -- LOX inlet side view.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Blue_Origin_BE-4_rocket_engine%2C_sn_103%2C_April_2018_--_LOX_inlet_side_view.jpg/2560px-Blue_Origin_BE-4_rocket_engine%2C_sn_103%2C_April_2018_--_LOX_inlet_side_view.jpg)
File:Blue Origin BE-4 rocket engine, sn 103, April 2018 -- LOX inlet side view.jpg - Wikimedia Commons
![Tory Bruno on X: "The BE4 Flight engine #1 is in Texas for its acceptance firing. But I forgot to share this picture taken right before it left Kent. Standard Reference included Tory Bruno on X: "The BE4 Flight engine #1 is in Texas for its acceptance firing. But I forgot to share this picture taken right before it left Kent. Standard Reference included](https://pbs.twimg.com/media/FZPnaIeXEAMxZLd.jpg)
Tory Bruno on X: "The BE4 Flight engine #1 is in Texas for its acceptance firing. But I forgot to share this picture taken right before it left Kent. Standard Reference included
![Blue Origin Completes the Delivery of Flight Engines to ULA for Vulcan's Initial Launch | Blue Origin Blue Origin Completes the Delivery of Flight Engines to ULA for Vulcan's Initial Launch | Blue Origin](https://d3ezn0y6hdgq62.cloudfront.net/be4_flight1_tipdown_3000px.jpg)
Blue Origin Completes the Delivery of Flight Engines to ULA for Vulcan's Initial Launch | Blue Origin
![Tory Bruno] OK. You guys have all asked so nicely. Here is a picture of the freshly COMPLETED BE4 Flight Engine #1 for Vulcan's first flight, in the stand at @blueorigin 's Tory Bruno] OK. You guys have all asked so nicely. Here is a picture of the freshly COMPLETED BE4 Flight Engine #1 for Vulcan's first flight, in the stand at @blueorigin 's](https://external-preview.redd.it/80KCtWcJQ1EaCc1FJKeVmY7kTsHaY7lLXC5SAq0d56s.jpg?auto=webp&s=a4ea38adfcf07b724cccc61f105a69d37620ab6b)