• cjameshuff's Avatar
    2021-May-16, 01:56 AM
    cjameshuff replied to a thread SpaceX in Space Exploration
    It has to be under some degree of pressure to support itself while loaded with propellant, we saw what happens when that isn't done with an earlier...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-15, 09:28 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    The same as flight pressure, considering it's brought to flight pressure on the ground...around 6 bar, I think. Or do you mean something else?
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-15, 02:00 PM
    cjameshuff replied to a thread Rocket Lab in Space Exploration
    Second stage failed. Got a brief shot of it igniting from the first stage, and a couple frames of a cooling engine bell from the second before they...
    23 replies | 781 view(s)
  • cjameshuff's Avatar
    2021-May-15, 01:28 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    Yeah, one set of connections/plumbing for all propellant transfer, whether in orbit or on the ground. The thrusters will be used to settle...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-12, 04:00 PM
    There's nothing strange about that. The OneWeb satellite was already actively maneuvering into its target orbit, SpaceX locked down the Starlink...
    1 replies | 52 view(s)
  • cjameshuff's Avatar
    2021-May-11, 11:59 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    You can put the engine on a truss with a shadow shield protecting the habitat...but then you have to keep the station in the shadow as well for all...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-11, 01:02 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    I see no reason to think this has anything to do with the NTR project. In fact, you'd have great difficulty combining the two due to the reactor...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-10, 10:43 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    Rapid maneuver of what? You've got to launch the stuff, and that's going to account for most of the delay. And NTRs are not exactly agile. It...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-10, 07:42 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    Yeah, that part doesn't make much sense to me. Even Mars is really too close, and the atmosphere and direct EDL for chemically-propelled vehicles...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-10, 01:41 AM
    cjameshuff replied to a thread SpaceX in Space Exploration
    NTRs are heavy and essentially only useful with liquid hydrogen propellant, or you don't even get that doubling of delta-v. A NTR LH2 tank isn't...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-09, 02:36 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    I very highly doubt they'll pursue either of those. Braking into orbit requires about double the delta-v compared to direct entry and landing. NTR...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-09, 12:16 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    And the Boeing Starliner not only isn't used for star travel, it's not a liner. And the Beechcraft Starship never even leaves the atmosphere. And the...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-07, 12:06 AM
    cjameshuff replied to a thread SpaceX in Space Exploration
    Mars is lower delta-v and easier to land on than Phobos, Deimos, or the moon. And Mars doesn't even have an atmosphere capable of supporting...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-06, 08:47 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    Mars is where the easily accessible off-Earth resources are. Water, CO2, nitrogen, high grade ores you can mine with a shovel...all in one place,...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-05, 06:09 PM
    If it was from any source other than the launch itself, it wouldn't have been visible except by impact. Orbital debris isn't something you're going...
    248 replies | 61071 view(s)
  • cjameshuff's Avatar
    2021-May-03, 12:38 PM
    cjameshuff replied to a thread Possible antistars? in Astronomy
    Ignoring dark matter, a substantial fraction of a typical galaxy's mass (10+% for the Milky Way) is in interstellar gas, which is constantly being...
    18 replies | 615 view(s)
  • cjameshuff's Avatar
    2021-May-02, 03:54 AM
    cjameshuff replied to a thread SpaceX in Space Exploration
    The Dynetics lander doesn't use the BE-7, it uses something developed in-house. The mass issue was described as it exceeding its "mass...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-May-01, 06:54 PM
    cjameshuff replied to a thread Possible antistars? in Astronomy
    The existence of rogue stars is precisely the problem. There's nothing special about stars that makes them uniquely capable of escaping a galaxy, and...
    18 replies | 615 view(s)
  • cjameshuff's Avatar
    2021-Apr-29, 06:47 AM
    cjameshuff replied to a thread SpaceX in Space Exploration
    ...their what? Since they launched their boss's car into solar orbit, exactly what percentage of NASA's deep space launches have gone to SpaceX?...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-Apr-28, 05:53 PM
    cjameshuff replied to a thread Possible antistars? in Astronomy
    That still leaves the question of how it got here without being accompanied by other antimatter dust, gas, and stars from wherever it came from, and...
    18 replies | 615 view(s)
  • cjameshuff's Avatar
    2021-Apr-28, 02:18 AM
    cjameshuff replied to a thread Possible antistars? in Astronomy
    Never mind the antistars, how could we possibly miss the giant clouds of antimatter they formed from? If any antistars exist anywhere, it seems like...
    18 replies | 615 view(s)
  • cjameshuff's Avatar
    2021-Apr-23, 06:52 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    The Falcon 9 booster lacks the throttle range to hover, but there's really nothing to gain from hanging around in the air just above the ground. A...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-Apr-23, 06:32 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    For the reentry burn, a higher throttle means decelerating at higher altitude and then accelerating more post-burn, a lower throttle means getting...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-Apr-18, 11:12 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    And even if they aim for a Starship equivalent, they're going to need a crash program...complete with crashes...to catch up. That's culturally...
    4977 replies | 695852 view(s)
  • cjameshuff's Avatar
    2021-Apr-18, 01:30 PM
    cjameshuff replied to a thread SpaceX in Space Exploration
    Stainless steel metallurgy is about 200 years old, amateurs on shoestring budgets were vertically landing rockets 20 years ago, and Bezos has a...
    4977 replies | 695852 view(s)
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