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Tim Dodd

๐Ÿ‘ค Speaker
2986 total appearances

Appearances Over Time

Podcast Appearances

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

It will literally stop like, say it stopped 200 feet above the ground,

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

Their only option is to kill the engine and then it's just going to fall those 200 feet.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

So it's what we call like a suicide burn or a hover slam, kind of interchangeable terms, because your thrust to weight ratio is never below one.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

So they have to actually literally be riding the throttle.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

So what you do is you kind of start, ideally, you know, you kind of start like in the middle of your window of throttle range.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

So let's pretend your engine can throttle down to 40%.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

of its maximum rated thrust.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

You might start at like 70% of thrust in the middle of that window of where it could burn.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

So if all of a sudden it's kind of coming in too hot, you have room to throttle up.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

If you're coming in too, you're actually a little too early, you throttle it down.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

You have a little bit of wiggle room.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

And it's just amazing how smoothly and how perfectly they're able to still control that thing, even though they're down to one engine out of the nine.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

And they're still riding the finest margin of what's possible.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

And they're continually playing with that to try to get it.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

Because every bit of fuel they're using and propellant they're using to land is propellant they weren't using to put something into space.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

So they want that to be as efficient as possible.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

So they're really watching them hone that in and just continue to evolve and edit that and just get it to be the workhorse.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

We're coming up on 100 consecutive landings.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

Perfect landings, 100.

Lex Fridman Podcast
#356 โ€“ Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

I think they've done like 150 something landings altogether, 160 altogether.