Comments by "Martinit0" (@Martinit0) on "Scott Manley" channel.

  1. Scott, why don't you interview Wally after the flight?
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  2. "I don't have very much Apollo 8 stuff". Yeah, I can relate - I have that problem too.
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  3.  @TheVillainInGlasses  Probably diluting the U salt concentration by mixing pure water in
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  4. They will probably x-ray them needles and put under electron microscope in search for ultra-advanced minituarization tech
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  5. Let's be happy that Steve Jurvetson went out to spend his own money to preserve these artifacts for everybody.
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  6. Not only that, but it also slowed down, which means that propellant likely sloshed to the front end and engines might have ingested gas.
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  7. ...on a spring
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  8. Space cowboys?
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  9. Falcon Autonomous Refuelling Tanker
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  10. They are different types of problems/difficulties. Booster catch is mainly about engine relighting and precise trajectory control and coordination with the catching tower. A lot of it can be simulated so preparations can be made more easily. The engine problem with Starship seems to be of a different type. It's a hydrodynamics problem or a material science problem (stuff getting too hot or corroding away). It may also be that SpaceX hasn't yet fully understood the problem they have. Clearly the fixes they implemented didn't resolve the issues. It could also be that there are several problems and they have only solved some but not all of them. Anyway, we are looking forward to what SpaceX will say about it.
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  11. Only the first ship will be more expensive and let's remember that SpaceX have a long line of would-be investors waiting to get in. So money to invest in R&D is not a problem as long as they can demonstrate progress and reasonable chance of eventual success. Furthermore they are now building a second revenue stream, StarLink which will eventually give them at least 3 independent revenue streams in different markets in addition to the Mars project: launching business (currently Falcon 9), StarLink i.e. telecom business and BFR for fast world-wide travel replacing conventional airlines long-haul routes in first and business class.
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  12. Is the US tax payer ready to drop another $100b on an ISS successor station?
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  13. It would take additional propellant to slow down before re-entry. The Falcon 9 booster actually perform their "re-entry burn" to do exactly that.
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  14. They are in business now - you should go and interview.
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  15.  @johndododoe1411  Actually, that would be an interesting topic for a dedicated video
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  16. Or maybe not switch off that many engines to avoid actually deccellerating.
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  17. I think his kids are now in the age where he has to beg so they agree to see him (except his youngest).
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  18. Since the fuel is reaction mass it exits at a few km per second relative to Dragon and the ISS and is also divergent.
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  19. Micah: my guess is, Mars visitors will be scientists first, because their ticket will be paid by institutions, accompanied by tourists. Engineers are kind of needed all the time - probably need to be a good generalist to be on the first few trips. Just need to keep in mind that if you want to start a business there you need to plan for a couple tons of supplies and machines too, so your budget will be way more than 100k. Farmer - or botanist as you say - will be an exciting and important job again!
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  20. now even in hard mode, apparently
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  21. You sure it wasn't the bugs?
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  22. Business models everywhere. I see a disruption of the farm silo delivery industry.
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  23.  @colinsouthern  I would expect the rocket to accelerate again once it gets lighter and in thinner atmosphere.
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  24. Scott, we know you are probably accumulating $500k in savings so you'll be on the first manned mission to and reporting directly from the surface of Mars. Fly safe!
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  25. If the Dragon heat shield is a single piece, like it seems to be, it's much easier to replace than thousands of individual tiles.
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  26. We truly want Scott to report from Mars, not just the station
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  27. seconded
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  28. I think of the time error as in you don't precisely know the radii of those circles unless you have a precise time.
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  29. Damn, there's a lot of ex-SpaceX people there. Their know-how must be diffusing quickly.
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  30. heatshield is basically a toast that's already been toasted massively
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  31. This was Ruassian trying an ISS playthrough on hard mode with only knife as weapon.
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  32. Ok, now we know how we can disrupt Elon Musk. He's finished.
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  33. Obligatory post of the G-Monster doing 30 seconds of 9g: https://youtu.be/_0nbRYIBVDQ?t=291
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  34. Water is a pretty good radiation shield. Rock too.
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  35. Why aren't magnetic bearings used?
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  36. My guess would be a ticket costs somewhere between 10 and a hundred million
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  37. Knowing Elon as we do he'll go for the lowest possible price but if it were really low they would publish it to attract more demand. An F9 launch costs $60M, but they lose the fairings and the upper stage. The BFS comes back but OTOH it needs to be human rated and mission time is several days. So they'll probably need to have a revenue of at least $100M per trip. Now it depends on how many seats there are. If more than 10 PAX a seat could cost less than $10M.
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  38.  @stevensmith797  That should probably take you half way to Mars if Elon Musk keeps his target price. Probably way more than Mars if you invest that much wisely now and wait until flights are availble.
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  39. Wait for Branson to announce name change to Manley Galactic
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  40.  @DistracticusPrime  How about "Anticipation of A New Lover's Arrival" (from Excession)
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  41. Think of it like a gravity acceleration assist, but with time reversed.
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  42. Would be great if you could go through the beam path of each of the sci instruments. The European NIRspec looks especially interesting.
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  43. Did he launch?
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  44. Hans Koenigsmann from SpaceX recently said in Bremen that SpaceX declined getting money for developing rockets. They prefer to develop on their own terms and sell the service.
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  45. NASA knows who is the customer LOL
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  46. So you guys basically sent a carrier battle group to Mars?
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  47. Looks like an Axel https://youtu.be/itruQOKoFFs
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  48. Elon: Fair point Scott, I will try a career as sit-down comedian then.
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  49.  @vaterchenfrost7481  no, we need SM to report on location from Mars. Doesn't matter if it takes 20 more minutes to upload the video.
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  50. What would happen if orbital mechanics would be introduced in EVE Online?
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  51. Scott, we really want you to save for that Mars trip
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  52. Christophe Gabriëls  Hayabusa2 main contractor is NEC
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  53. Meanwhile New Zealand's Rocket Lab managed to reach orbit on January 21, 2018: https://youtu.be/eg5234BOED8
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  54. Who knows, maybe Scott can license his control code, LOL
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  55. Can we also appreciate the fact that SpaceX was so crazy to do the stack operation in night time?
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  56. The answer is "everywhere inside the bell and combustion chamber". Since the exhaust chamber and nozzle are open on one end none of the gas pushes that way against the construction, hence the rocket goes the other way.
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  57. Thrust is a force whereas exhaust is the material that comes out at the end - two different things. My opinion: when you call the fuel "exhaust" is a matter of semantics. You could define exhaust as "when it passes the aft end of the nozzle bell". It's probably safe to say that at that point the fuel won't create any more thrust. Whereas when the fuel exits the combustion chamber it can still generate a bit of thrust when their molecules collide with the nozzle walls.
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  58. In this case, make sure to not wear a red shirt
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  59. Yeah, that's probably why they put the kitchen satellites at the butt of the rocket
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  60. 230 g ! That's like running into a concrete wall
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  61. Germans and Russians don't count.
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  62. In fact, this is the new booster block 6, which upon water landing turns into a submarine and then autonomously sails to SpaceX facilities at Port of L.A. Now you know why it needs fins.
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  63. 4:34 Scott's DJ self comes out LOL
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  64. 1:05 The Crew stage! So we are going! Scott leaked it
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  65. ton is a unit for mass though ;-)
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  66. Well, now you know why entering the atmosphere is so challenging and why Russians never had a successful landing on Mars
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  67. SpaceX is working on it. If they can refuel a Starship in earth orbit before departing for deep space that should speed up things considerably.
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  68. According to Wikipedia the 2017 vacuum version of Raptor has an Isp of 375s, so still much less than LH2/LOX RL10 at 460s
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  69. You misunderstood. He's changing his name in 2025, probably to Scott Colombo.
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  70. What's the typical percentage of mass flow that is lost through the exhaust of gas generator types?
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  71.  @Xinnie_The_Flu  It seems like it's more extreme than hot dry sand on the beach, but maybe only by a factor of 2. Maybe more close if the sand was black?
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  72.  @scottmanley  I am now imagining that Airbus and likely also Thales employ somebody specializing in proper wrinkling of space mylar sheets.
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  73. No, but they could launch a huge remotely operated vacuum cleaner.
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  74.  @masi416  No
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  75. It's the rocket equivalent of a shiny PowerPoint presentation
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  76.  @bentemple6043  Kepler: Just a flesh wound
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  77.  @Urgelt  Agree, inexpensively, but work it must. I suppose we'll hear the real reason in Elon's next presentation.
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  78. Yes https://en.wikipedia.org/wiki/Shackleton_(crater)
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  79. Next in series: Crazy Things You Can Do With Asteroids
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  80. Although in this particular case they had to step waaaay back to get all the subjects into the frame.
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  81. Pah! Just ja flesh wound!
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  82. What about Orbcomm?
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  83. The point of being reflective is to not absorb the heat in the first place. What you don't absorb you don't have to re radiate.
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  84.  @Simple_But_Expensive  Is that what people call the iterative approach?
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