Elon's SpaceX Starship:
Depiction of metallic heat shield tiles between the Raptor 3 engines. The engines themselves have regenerative cooling on their outsides, as well as the internal combustion areas. This simplifies and reduces the mass of the V3 booster's heat shield.
Screenshot from #WAI video.
The first Stoke Aerospace Nova launch will be to heliocentric orbit, so the 1st upper stage won't attempt re-entry yet. The first launch is for Nova to attempt to put payloads in orbit for customers. Later launches will attempt to land both stages after a mission is complete.
The 1st stage is a methalox stage with 7 Zenith FFSC engines. The 2nd stage is a hydrolox aerospike with the multichambered Andromeda engine.
"On Monday, Booster 19 lit its engines for the first time. It lasted about three seconds. [Stopped early due to a ground issue]."
(~23 minutes #WAI video)
- Youtube video: https://youtu.be/VJwD85E7OcU
- Invidious video: https://inv.nadeko.net/watch?v=VJwD85E7OcU
Flight ready Andromeda engine for Nova's reusable upper stage. This hydrolox engine also acts as a heat shield that uses liquid hydrogen for its regenerative cooling.
So instead of an ablative heat shield using vaporized heat shield material to remove heat by convection, this heat shield uses liquid hydrogen to remove the heat by convection.