Timeline for For Starship, using B9 and later, how will separation work if the Hydraulic Power Units are no longer needed for the TVC System?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| May 9, 2023 at 19:13 | comment | added | user19132 | If it already works well between 2nd stage and payload for F9, isn't starship separation from superheavy supposed to happen in atmospheric drag ? | |
| May 3, 2023 at 7:57 | comment | added | Jörg W Mittag | @geoffc: Except Elon didn't say what's in your quote. In fact, he said the opposite: he said that stage sep didn't fail because it was never attempted, as the criteria for stage sep were never hit. When he talks about stage sep, he says it wasn't attempted, and when he talks about hydraulics, he talks about TVC, not stage sep. He talks about hydraulics in the context of fault isolation and that it is hard to have fault isolation if you have a common manifold feeding hydraulic pressure to multiple actuators. He then continues that the problem is fixed in B9+ with independent electric motors. | |
| May 2, 2023 at 20:28 | comment | added | geoffc | If you read my question, I quote Elon saying that Separation failed because the hydraulic system failed. So there is some component of the process that is hydraulic, even if not all of it. | |
| May 2, 2023 at 7:43 | comment | added | Jörg W Mittag | It follows Musk's 5 steps of engineering: 1) Your requirements are dumb. Make them less dumb. 2) Delete the part / process step – if you are not realizing that deleting it was a mistake and have to add it back in at least 10% of the time, you haven't been deleting aggressively enough. (cough flame diverter cough water deluge cough) 3) Third, and only third: optimize. The biggest trap for a smart engineer is to optimize a thing that should not exist. 4) Accelerate the cycle time. 5) Automate. (4 and 5 refer to mass production.) Starship stage sep is currently at step #2. | |
| May 2, 2023 at 0:08 | comment | added | Organic Marble | Thanks for the explanation. I had only heard garbled versions of it and couldn't believe it. Still seems like a terrible idea but we'll see. | |
| May 1, 2023 at 22:13 | history | edited | uhoh | CC BY-SA 4.0 |
added 22 characters in body
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| May 1, 2023 at 16:53 | history | answered | Jörg W Mittag | CC BY-SA 4.0 |