8 ms·

This is the first flight of the new engines. They look so much sleeker and simpler than the previous two generations: https://encrypted-tbn0.gstatic.com/images

This is the first flight of the new engines. They look so much sleeker and simpler than the previous two generations: https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQGMtnPjtG8DUA5B2Do-Tzpb0Kp06Uzo5G9xgXLkS6sjsgxBZiXNoCUg4kJ&s=10 https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQGMtnP... * And supposedly with a 20% power increase to boot!

chasd00 4mo ago
The stats are pretty out there. Iirc just the fuel pump, which you can probably pick up and put on your desk, generates 100k HP.
- jvanderbot 4mo ago
  Well, it's powered by bleeding exhaust from a very big rocket.
  - TomatoCo 4mo ago
    One of my favorite clips to give a sense of scale for rockets is this one. https://www.youtube.com/watch?v=70u748VALt4 https://www.youtube.com/watch?v=70u748VALt4 I show someone and then I tell them, that's not the rocket exhaust. That's the exhaust for the engine that runs the fuel pump for the rocket.
    - ethbr1 4mo ago
      To me the coolest thing about rocket engines from an engineering perspective is the tyranny of efficiency that the physics mandate. Because weight is so critical, there's no luxury of "another component". If something can be repurposed, it is! And the power opportunities afforded by continually dumping that much fuel through are mind boggling. Even regenerative cooling with combustive fuel blows my mind.
  - jasonwatkinspdx 4mo ago
    Nope, Raptor is full flow staged combustion, so both the fuel and oxidizer have dedicated preburners and turbopumps each.
    - jvanderbot 4mo ago
      Thanks for that correction!
MattDamonSpace 4mo ago
Oh wow that photo is from years ago but you’re correct, this is the first flight of that design
russdill 4mo ago
SN1 was a test engine, the flight engines are even cleaner https://fixupx.com/interstellargw/status/2057165036196409820 https://fixupx.com/interstellargw/status/2057165036196409820
Culonavirus 4mo ago
Booster dry mass savings of around one ton per engine iirc.
dylan604 4mo ago
Raptor1 looks like the steampunk or mad max version

chasd00 4mo ago

The stats are pretty out there. Iirc just the fuel pump, which you can probably pick up and put on your desk, generates 100k HP.

jvanderbot 4mo ago
Well, it's powered by bleeding exhaust from a very big rocket.
- TomatoCo 4mo ago
  One of my favorite clips to give a sense of scale for rockets is this one. https://www.youtube.com/watch?v=70u748VALt4 https://www.youtube.com/watch?v=70u748VALt4 I show someone and then I tell them, that's not the rocket exhaust. That's the exhaust for the engine that runs the fuel pump for the rocket.
  - ethbr1 4mo ago
    To me the coolest thing about rocket engines from an engineering perspective is the tyranny of efficiency that the physics mandate. Because weight is so critical, there's no luxury of "another component". If something can be repurposed, it is! And the power opportunities afforded by continually dumping that much fuel through are mind boggling. Even regenerative cooling with combustive fuel blows my mind.
- jasonwatkinspdx 4mo ago
  Nope, Raptor is full flow staged combustion, so both the fuel and oxidizer have dedicated preburners and turbopumps each.
  - jvanderbot 4mo ago
    Thanks for that correction!

MattDamonSpace 4mo ago

Oh wow that photo is from years ago but you’re correct, this is the first flight of that design

russdill 4mo ago

SN1 was a test engine, the flight engines are even cleaner https://fixupx.com/interstellargw/status/2057165036196409820 https://fixupx.com/interstellargw/status/2057165036196409820

Culonavirus 4mo ago

Booster dry mass savings of around one ton per engine iirc.

dylan604 4mo ago

Raptor1 looks like the steampunk or mad max version