SpaceX on Twitter: "The first Raptor Vacuum engine (RVac) for Starship has shipped from SpaceX's rocket factory in Hawthorne, California to our development facility in McGregor, Texas https://t.co/xp2luf6XaI" / Twitter
Why doesn't the SpaceX Merlin engine pipe the turbopump exhaust around the main exhaust nozzle like the F-1 engine in NASA's Saturn V? - Quora
![Everyday Astronaut on Twitter: "Just finished this little animation showing the expansion ratios of @SpaceX's Merlin 1D engines. Crazy how much bigger the vacuum nozzle is compared to the sea level nozzle! Everyday Astronaut on Twitter: "Just finished this little animation showing the expansion ratios of @SpaceX's Merlin 1D engines. Crazy how much bigger the vacuum nozzle is compared to the sea level nozzle!](https://pbs.twimg.com/ext_tw_video_thumb/1174457544359759872/pu/img/yw4YUPr0oeCMWrmA.jpg)
Everyday Astronaut on Twitter: "Just finished this little animation showing the expansion ratios of @SpaceX's Merlin 1D engines. Crazy how much bigger the vacuum nozzle is compared to the sea level nozzle!
![spacex - What is the ring at the bottom of the Merlin vacuum engine? - Space Exploration Stack Exchange spacex - What is the ring at the bottom of the Merlin vacuum engine? - Space Exploration Stack Exchange](https://i.stack.imgur.com/9qIFO.jpg)