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Joined 1 year ago
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Cake day: December 16th, 2024

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  • Bruh they’re just warming up.

    A couple street executions here, a detainment and (separate) FBI search of journalists there to gauge public response. They’ll adjust their approach, improve their propaganda and continue dismantling communities.

    They’re deep into abducting and concentrating innocent people including children They will continuously escalate their brutal and violent responses to resistance.

    They demanded voting records. They aren’t stopping with immigrants and they’re taking the first steps toward cataloging the opposition.

    Trump is not in charge. He is the distraction, the orange herring providing cover for the likes of Stephen Miller, Russell Vought and other focused, effective organizations operating in the background. The true consequences of the dozens of executive orders Trump auto-penned in his first months have hardly kicked in yet.

    We’re just reaching the second quarter.


  • Depends on how much effort went into reverse engineering the part, but most likely when tolerancing enters the conversation. Most machine shops aren’t able to hit those tolerances and would laugh you out of the shop.

    A shop that can hit those tolerances will kick you out of the shop; there’s a good chance they already work in aerospace. They have a deeply vested interest in avoiding the accompanying FAA inquiry should it be installed or, Satan forbid, actually flown.

    A non-aerospace shop capable of meeting those tolerances would start laughing at the desired price point. Purchasing a suitable blank alone would cost over $1500, much less cover the actual machining.




  • UniversalBasicJustice@lemmy.dbzer0.comtoLemmy Shitpost@lemmy.worldgenius
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    3 months ago

    Aerospace manufacturing has a paper trail longer than you can imagine. The company selling this part can tell you (well, the FAA) the exact ingot out of the foundry and every single process and every person who has touched it since then.

    No machine shop will take this job; the moment this guy is unable to produce a serial number and paperwork from an approved manufacturer (likely during preflight if not installation) the FAA will track down the owner of said shop. At best that owner will lose their business and pay a massive fine, at worst spend a good long time in prison.

    The FAA doesn’t fuck around and for that I am thankful.


  • I was a huge fantasy nerd as a child. Wanted magic to be real so badly, wanted to be able to affect change in the world purely through force of will. As I grew older I realized humans do have magical abilities; a group of humans with sufficient domain knowledge and the right tools can absolutely bring about change through sheer force of will. I absolutely studied magic (engineering) in University and seeing magic from other disciplines always left me awestruck.

    Especially sparkies; “don’t let the magic smoke out of the wires” is the extent of my electrical knowledge.





  • Not stupid at all, that’s an excellent question! I’m not privy to the details of this furnace satellite but I have an idea or two on how I’d approach the problem. Pure (somewhat educated) speculation ahead.

    Firstly, you mentioned nonconductive materials. Insulating material isn’t perfectly nonconductive but can get pretty close. I’d imagine combining insulation with the vacuum of space would limit conductive heat transfer between furnace and the other equipment.

    Insulating and limiting the conductive transfer of heat doesn’t eliminate it though. You’d still need an active form of transfer to shed the heat. I’d investigate the feasibility of a convective heat exchanger; use coolant to transfer heat from the furnace to a radiator.

    From there I’d study how the James Webb Space Telescope maintains equilibrium. It uses a reflective shade to shield the radiator from the sun but I lack specific knowledge of the design. The temperature difference between hot side and cold side is a driving factor in heat transfer; maximizing the difference between the two leads to more efficient, effective control.

    Honestly though, its been a few years since my senior heat transfer course. Radiative heat transfer in the vacuum of space is Master’s if not PhD level specialization. I’m not at that level yet, so please take this answer with a large block of pink Himalayan salt.




  • There are three modes of heat transfer; conduction, convection, and radiation.

    Conduction happens when two bodies at different temperatures come into contact with each other. The total heat transfer depends primarily on the difference in temperature, contact surface area and time spent in contact.

    Convection takes place when a fluid (I.e. a gas such as air or a liquid such as water) comes into contact with another body. Here, again, heat transfer depends on difference in temperature, contact (“wetted”) surface area and time in contact which is primarily dictated by how fast the fluid is moving over the body.

    On Earth we generally leverage these two modes. An example of mixing the two modes is a CPU heatsink and fan setup. The heatsink conducts heat away from the CPU and is (usually) distributed throughout several extended surfaces I.e. fins. The fins increase the surface area in contact with air, enhancing the rate of heat transfer.

    Now, we can’t really take advantage of those in space. The lack of an independent physical medium means the heat ultimately has no where to go; this is known as a “closed system”. So if we generate or store enough heat in a body subject to the void of space without promoting radiative heat transfer, that heat will more or less stay put.

    Radiative heat transfer is fucked up. Everything above absolute zero radiates heat. You mostly can’t see this except for one glaringly obvious example; the Sun. Sol is so fucking hot that it heats the Earth through the vacuum of space purely via anger aka photons. And thanks to the miracle of science, you radiate anger right back at it.

    Explaining radiative heat transfer further is outside the scope of this reply and will be left as an exercise to the reader.

    I hope I explained this well enough for you or other readers to impart a ‘basic’ idea of a complex engineering discipline that I adore. I’m absolutely willing to answer any questions.