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Posts posted by Exploro

  1. On 6/3/2024 at 11:40 PM, mikegarrison said:

    So ... the Hubble might be non-functional due to a gyroscope problem. Or maybe they can remotely work around that and keep it functional, but for no more than about 10 years.

    The decision is to resort to single gyro operating mode for pointing the telescope. This will pose have some limitation on the type of science Hubble can do, but should still allows for the kind of science the spacecraft has been doing for nearly three decades. The article also mentions that the NASA has ~10 years to decide on sending a propulsion unit to the telescope for orbit modification or for controlled re-entry.

  2. Granted. A random string of code that represents vocal sounds corrupts the means of manufacturing and their various control systems. What transpires is a scenario straight out of Zero Horizon Dawn where everything on the earth surface is consumed all to continuously manufacture the symbols of this alphabet. You are welcome.

    I wish the avoid becoming converted into a vowel.

  3. As of the end of last month, the Hubble was considered to be in good health. Three gryos are functional, though one of the three produced erroneous readings that caused the spacecraft to enter safe mode at least twice, once in April and again last November. According to source, the Hubble could be made to operate running on one of the healthier gyros for pointing operation with the second healthy gyro to serve as back up.

  4. On 5/17/2024 at 9:43 PM, tater said:

    So put a NASA astronaut aboard. Problem solved.

    It's more than just crewing the mission with NASA astronauts. The question is this; do the capabilities exist in the private space sector that can allow for a crewed servicing mission to the Hubble that mitigates as much of the risk to not only the crew tasked with the mission but also the orbiting piece of public property that is the Hubble Space Telescope? I would posit that it still does not have that capability at the present time. Even Polaris Dawn; as ambitious as it is, it still not enough of a demonstration to justify confidence that an Issacman/SpaceX venture to Hubble can be safely executed in the near term.

    15 hours ago, Kimera Industries said:

    I mean, it's free- how do they not want this? 

    Red tape makes me mad. We need a deregulation of the space industry, just like we do with nuclear reactors. There's so much lost potential.

    The issue here has nothing to do with red tape or regulations. Issacman is basically soliciting NASA with regards to a service which it has not officially asked for. It may be receptive to hearing ideas on the matter; as evident by it's dealing with Issacman and by responses to the agencies requests for information to other commercial space companies on a robotic Hubble orbital-boost mission. But that interest is not the same as a publicly stated (and congressionally funded) objective the agency intends to execute. Furthermore, Issacman is asking the Agency to stake its reputation on a mission that will be badly damaged if it were to allow such a mission to proceed it its name that results in the deaths of crew, the premature destruction of a public asset, or both. That alone would justify reticence on the part of NASA officials to proceed with a such a mission proposal. 

  5. On 4/21/2024 at 3:18 AM, Spacescifi said:

    We make turbofans for flight on earth.

    Scenario: Attempt to fly a turbofan jet plane on:

    Mars: Nothing much happens right? No air. Jet engines need oxygen.

    Neptune: Same?

    Saturn: Same?

    Jupiter: Same?

    Conclusion: In theory you could bring liquid oxidizer but that just makes the plane weigh more and reduces flight range.

    Which leads to the conclusion that ductfans and propeller craft powered by electric power are the ways we know could work for flight virtually anywhere. Since all you need is atmosphere to react with.

    Anything requiring oxygen or any specific chemical is niche.

    Yes you could design aircraft specifically FOR Neptune or Saturn to exploit their specific chemicals in the air, but they would not be craft good for flying almost on any other planet with atmosphere.

    The foundation of modern industrial power began with mechanical power (pulleys, levers, etc), graduated with chemical power (gunpowder, dynamite, oil and gas, and rocketry), and has entered the age of electrical power, although we have not fully exploited it yet.

    Chemical power has limits based on chemical reaction power released.

    Electric only has limits based off heat and storage, and so far chemical beats it purely based on chemical storing more power.

    EDIT: I did not mention nuclear, because although you could make a nuclear turbofan... the nuclear part is the danger. Specifically the radiation. Although if you had no better alternative it would be perhaps a good alternative in any atmosphere where free oxygen is rare or nonexistent.


    Point of fact, jet engines do not need oxygen to operate. In fact, they don't even require combustion at all. Case in point, squids and octopus use jets. The means to accelerate reactant mass does not involve combustion.

    With regards to turbojets, and by extension the cores of turbofans, as long as there is a source of heat and the engine operates as close to an ideal Brayton-cycle as possible, it should work in almost any gaseous medium. As you correctly identified, input heat to the core can be supplied from a nuclear reactor. As the diagram below shows, heat from the reactor is added to the fluid flow downstream of the compressor via a heat exchange.


    Of course, why would you wish to use a turbojet, or turbofan, for powered flight within the atmospheres of other planets anyway?

  6. Quick reading of the wiki page on human tolerances to g-forces, having a pilot standing will not enhance resistance to g-forces. In fact, it would do the opposite in that the body would be aligned with the aircraft's vertical axis, along which most of the g-forces a pilot sustains occurs along. If the aim is to improve the magnitude and duration of g-forces a pilot endures, ideally you would want the pilot to be laying down, perpendicular to the axis of the g-forces.

    Of course, that is not a practical orientation. As a trade off, many fighter planes use seats that recline to reduce the effects of g-forces on the pilot. An Aircraft Stack Exchange post puts the angle around 13-15 degrees. The post indicated the F-16 seat has an unusually large reclining angle of 20 degrees.

  7. On 4/3/2024 at 11:59 PM, kerbiloid said:

    Granted. You are undisturbedly watching the eclipse on the 8th, scratching your fur with tusks and howling.

    I wish the eclipses were more often.

    I became a were-walrus?! Cool.

    As for ColdJ, granted. However, your increase in creativity is limited to the niche of drawing lousy memes.

    I wish for were-walrus to become the next big meme.

  8. Granted. Before you is a bowl of delicious baked beans for dinner. As you proceed to dig into your meal, you are approached by two middle aged ladies holding clip boards. "Would you like to take a survey?!", they ask in unison. From here on out, you are endlessly peppered with questions related to beans and George Wendt.

    I wish for for an undisturbed viewing of the eclipse on the 8th.

  9. Granted. Behold a sandwich materializes before you. It is comprised of two slices of bread. So far so good. Each slide is slathered with the appropriate amount of mayo and trimmed with whichever cheese suits your fancy. As for the meat; it is monkey's brain which has the texture of snot but I am told the taste is out of this world.

    I wish for a hearty vegetable soup.

  10. Granted. A woodpecker arrives at your home and proceeds to play the song of its people for hours, drumming, drumming upon your chamber door.

    I wish that the 3.5 mm headphone port on my phone would go back to being functional once more, in a way that does not compromise the functionality and utility of the rest of the phone.



    39 minutes ago, TwoCalories said:

    Granted. You try it and go to the ER with a broken pinky.

    I wish pinky toes had a purpose other than get bumped into table legs and causing extreme pain.

    Granted. Your pinky toes double as olfactory organs. Thus your world constantly reeks of stinky-feet. This is in addition to the prospect of bumping them into table legs and experiencing the extreme pain that ensues. You're welcome.

    I wish future generations are not cursed with accessory nails on their pinky toes.

  12. 4 hours ago, tater said:

    They should have been working starting April 21 IMO. FAA has experience with this stuff, Fish and Wildlife doesn't. They are government employees, so it's safe to assume they are the B team anyway (A team quality people would be doing literally any other work). (NASA is about the only exception to this paradigm I can think of)

    You would have wanted them to commence work on assessing the impact of flame mitigation system that had not even been implemented at the time and of which a final configuration was not really fleshed out till around the May or June time-frame?

  13. 1 hour ago, CatastrophicFailure said:

    No. Incorrect. Wrong. 

    Unless you think building a launch site in, say, the middle of downtown Corpus Christi is somehow a valid choice. As others have pointed out, there is literally nowhere else in the US they could have placed a launch site without ruffling SOMEone’s feathers. The lesser of evils really isn’t much of a choice.

    I concur with Sunlit, the existence and continued development of Starship facilities at LC-39A demonstrates an alternative option.

  14. G'day mate. Your wish has been granted. You're in Esperance, Australia, July 12th 1979. It is just past the midnight hour. You are standing in the midst of the outback when you see bright streaks in the night sky. One appears almost motionless for a short while, but then appear to draw nearer. Get ready to receive Skylab, albeit, a giant chuck of it.

    I wish to visit the last of the Babylon stations, that shining beacon in space, all alone in the night.

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