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  1. #376
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    Quote Originally Posted by Edmond View Post
    Actually, is there a fallback that it can still operate if one fails?
    Takovers is the man to ask.

    However, some have allegedly suggested one or two possibly.

    Above 7 they have to ditch the steerage class passengers.

    At 1:32 there is a black circle on the rocket, just above the venting gasses.

    Coincident or a hidden feature?

  2. #377
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    Quote Originally Posted by OhOh View Post
    All 33 engines worked OK?
    Quote Originally Posted by Edmond View Post
    Actually, is there a fallback that it can still operate if one fails?

    This booster has only 27 engines. Or rather it will have. Booster 4 has not been test fired yet, it will be tested on the orbital test stand, so at least in theory it could be test fired with all engines. Booster 3 has been test fired on a suborbital test stand with only 3 engines. The suborbital stands have been damaged with 3 engines. Though some people who should know, havementioned they will test fire Starship 20 with 6 engines, but that's really stretching it.

    The 33 engine version is coming soon. They will probably fuel it only in part so it can take off. Very little payload capacity with this. It will carry the traditional wheel of cheese only.

    The idea is that both the booster and Starship can at least lose one engine in any phase of the flight and still complete the mission. It is intended to be safe enough that they can fly people without abort capability like all the capsules have.
    "don't attribute to malice what can be adequately explained by incompetence"

  3. #378
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    Quote Originally Posted by tomcat View Post
    ...of course, once plasma engines are developed, such elaborate constructions will no longer be necessary...

    None of the envisioned new propulsion systems will be capable of launching from Earth. They are purely in space propulsion that can fly only orbit to orbit between planets. They will be efficient but low thrust.

    What do you mean with plasma engines? Ion drives like Hall thrusters or do you think of nuclear drives?

    I hope for direct fusion drives. Maybe they can develop fusion that can directly produce thrust. I may be too optimistic.

  4. #379
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    A phantastic photo by BocaChicaGal. It is the thrust puck for a 33 engine booster. This puck has 13 engines in the center. Additional there will be an outer ring of 20 engines that thrust directly to the rocket skin. A beautiful piece of equipment. Forged, then machined.

    Elon Musk has said, this is the final configuration for the booster. But with SpaceX final means only until the next change.

    SpaceX - On to Mars-thrust-puck-13-engines-jpg

  5. #380
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    Things are moving forward at Boca Chica. One of the many daily videos of NSF forum about the progress of launch preparation and building the factory. They already have everything to build first and second stage of Starship. What they are doing now is to streamline and speed up production. They are really preparing for producing Starships at a rate that has only been done in the 2060ies for ICBMs on the height of the cold war. With a highly reusable vehicle this means they are preparing for multiple launches a day. A capability that is needed only for a full settlement drive of Mars.

    Robert Zubrin, a very active proponent of going to Mars and founder of the Mars society, said this is not an expedition to Mars, this is D-day. An invasion, sending an endless stream of people and material to Mars for building a self sustaining City on Mars.


  6. #381
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    SpaceX has done a test of Starship. First time all 6 engines are installed. First they did a preburner test which resulted in a huge fireball of methane burning off that was expelled from the engines not burning.

    Then a test of all 6 engines, 3 sea level engines and 3 vacuum engines. Raptor Vac engines can be fired at sea level but only in full thrust, not throttled. Video is on twitter, worth opening. Elon Musk confirmed 6 engines firing.

    The preburner test
    SpaceX - On to Mars-preburner-test-jpg


    SpaceX - On to Mars-6-engine-fire-jpg


    https://twitter.com/NASASpaceflight/...23181684838403
    Last edited by Takeovers; 13-11-2021 at 01:41 AM.

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