The upper stage of Astra's Rocket 4 will use the vacuum variant of Ursa Major's Hadley, an oxygen-rich staged combustion engine fueled by liquid kerosene that will provide 6,500 pounds of thrust. Learn more here: https://astra.com/launch-services/
On this page of the site you can watch the video online Launch System 2: Upper Stage Engine with a duration of hours minute second in good quality, which was uploaded by the user Astra 24 April 2023, share the link with friends and acquaintances, this video has already been watched 7,939 times on youtube and it was liked by 336 viewers. Enjoy your viewing!