In aerobatics, the cobra maneuver (often shortened to the cobra), also called dynamic deceleration, among other names, is a dramatic and demanding maneuver in which an airplane flying at a moderate speed abruptly raises its nose momentarily to a vertical and slightly past vertical attitude, causing an extremely high angle of attack and momentarily stalling the plane, making a full-body air brake before dropping back to normal position, during which the aircraft does not change effective altitude.

It is sometimes called Pugachev's Cobra named after Viktor Pugachev, the first pilot to bring the maneuver to the public eye.

The maneuver relies on the ability of the plane to be able to quickly change angle of attack (alpha) without overloading the airframe, and sufficient engine thrust to maintain nearly constant altitude through the entire move, but also post-stall stability and aerodynamics that allows for the recovery to level flight. The maneuver demands accurate pitch control, alpha stability and engine-versus-inlet compatibility for the aircraft, as well as a high skill level on the part of the pilot.

The cobra maneuver is an example of supermaneuverability, specifically poststall maneuvering. The Herbst maneuver and the helicopter maneuver are similar post-stall maneuvers that are often executed by 4.5th Generation and 5th Generation fighter aircraft employing thrust vectoring.

The maneuver is typically performed at air shows, but could be used as a last-ditch maneuver to force a chaser to overshoot in close-range air combat. The maneuver has never been verified in real combat, although it has been used during mock dogfights and border protection.

Execution (Sukhoi Su-27)

In the case of the Su-27, to execute the maneuver the pilot initially disengages the angle of attack limiter of the plane, normally set at 26°. This action also disengages the g limiter. After that, the pilot pulls back hard on the stick. The aircraft reaches an angle of attack of 90–120° with a slight gain of altitude and a significant loss of speed. When the elevator is centered, the drag at the rear of the plane causes a torque that makes the aircraft pitch forward. At the same time, the pilot adds power to compensate for the reduced lift.

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  • Sasuke [comrade/them]
    ·
    3 years ago

    i had to record a video presentation for an assignment and it looks and sounds like a hostage video

    :agony-minion:

    • Sasuke [comrade/them]
      ·
      3 years ago

      it also had to be in english (not my first language) which really added to the agony

  • Awoo [she/her]
    ·
    3 years ago

    The UK has 2,800 rough sleepers on any given night while the US has 557,000. The "homeless" figures are calculated differently and mislead people into thinking US homelessness is comparable to the UK homelessness of 280,000 which actually refers to all people without a fixed address but that might be sleeping at a friends house or in a hostel.

    Just in case americans wanted some perspective on american depravity. The US is 5x the population of the UK with 500x the number of people sleeping on the streets.

  • riley
    ·
    edit-2
    1 year ago

    deleted by creator

  • CyborgMarx [any, any]
    ·
    3 years ago

    Sure would be hilarious if the Sea People just showed up out of nowhere and caused the collapse of capitalism

    Climate change? Nuclear holocaust? Water wars? Nah son, the Sea People are back and they're itching for round two

  • WhyEssEff [she/her]
    ·
    3 years ago

    gonna get a c on this paper but worth it to write the sentence "An example of an undemocratic country that embodies this point is America" :sicko-yes:

      • WhyEssEff [she/her]
        ·
        3 years ago

        mini essay on barber's strong democracy i'm using it to argue for workplace democracy

          • WhyEssEff [she/her]
            ·
            edit-2
            3 years ago

            paraphrased it a bit to negate doxxing risk but just finished :sicko-yes:

            To have a truly democratic society, as Barber suggests, we would need to emphasize a balance between the participatory representative democracy we already have, as well as a widespread civic democracy which we need.

            Democracy is an essential aspect of matching governance with the human condition. Undemocratic countries tend to have governance that grows increasingly out of touch with it as time marches forward. An example of an undemocratic country that embodies this point is America. Single-payer healthcare is a massively popular idea in America, but due to bribery, corruption, insider trading, and conflicts of interests, American healthcare remains privatized and routed through insurance companies.

            One of the major issues with large-scale liberal democracy is that to obtain influence, airtime, and reach to voters, one must obtain capital. Grassroots campaigning is disincentivized by capitalism – sure, one could theoretically not accept the “I can’t believe this has caveats!” money from private interests, but unless you have a strong ideological hang-up, why wouldn’t you? As always, once issues are voted on, those donors will have their eyes on you, scissors hovering over the cash IV drip, hoping you’ve understood what you have gotten into.

            In fact, representative democracy (when the only democratic method available) is notorious for allowing private interests to creep into the institutions of governance. Barber even argues that it’s baked into the liberal ideology that guides it. “If politics can be redefined as the public airing of private interests, public goods can be redefined as private assets. Thus, soldiers are now "hired" on the private market, public lands are sold off into private hands to be maintained by charging the public for goods and services once deemed to belong to the public, and private "incentive" systems are used to get private corporations to live up to public responsibilities. This pervasive privatization of the res publica (things public) has deep roots in liberal thinking, although finally it corrupts even the most liberal and indirect forms of democracy.” (Barber).

            Barber’s argument is a very realist one. People like things. People like to be the ones better off than the ones who are dying. Under an individualist, liberal framework, this translates into wealth accumulation. If people feel they are constantly under threat of losing their stability and comfort, they will inevitably attempt to hoard things, stuff, and (sometimes draconic amounts of) cash. Therefore, people will usually take money if they aren’t harmed directly by taking it. Representatives are easily corruptible, as they too are participants in society and have a desire to maintain or improve their standard of living.

            Barber’s Strong Democracy is fundamentally an argument for baking democracy into the very fabric of society. Instead of ‘doing a democracy’ only once every four or so years and then disengaging, Barber argues that we should constantly be participating in collective decision-making when decisions are to be made that directly impact our lives daily – from a local level, all the way to the top – if we wish to have a true connection to the societal institutions we participate in every day.

            To this, I very much agree! We do need more democracy in our daily life. As humans with the ability to self-determine, it is our right to exercise that self-determination. Not being able to play a part in decisions that directly affect oneself is fundamentally dehumanizing, and dehumanization is an unjustifiable action.

            To see an example of this dehumanization, one must look no further than the most widespread dictatorship of them all: the workplace. Workplaces are fundamentally a totalitarian institution by default under capitalism. What the boss says, goes. Work or starve. Fundamentally, work under capitalism is only maintained by a dehumanizing choice between exploitation and death. What justification is there for this ultimatum that does not fundamentally rely on the argument that meritocracy is an axiom of life (and this is where you pull out Michael Godwin’s trusty invocation as to have them defend the meritocratic basis of his tenure) and therefore the workers don’t deserve to decide because they’re either stupid and lower-class, or some mystical reasoning that ends up at that exact conclusion under inspection.

            Barber is right. We do need a stronger democracy, now more than ever. If the past 8 years have not convinced you of the failings of liberal democracy, the next 8 years are more than happy to do so for you.

            there's lib isms in there because i need to pass this course but i cannot resist agitation when possible

            • DictatrshipOfTheseus [comrade/them, any]
              ·
              3 years ago

              Hot damn, this is just chock full of excellent takes. Obviously, as an essay it's :chefs-kiss: but like that last line for example... Imma be using that line against libs. So glad you shared comrade!

              It would be an injustice if you only get a C, but any lib who would give you a C doesn't give a shit about injustice, ipso facto.

  • viva_la_juche [they/them, any]
    ·
    3 years ago

    Just saw a video like “do we actually want affordable homes? The housing affordability crises we don’t want to solve”

    Who tf is we fam. I’m assuming it’s some justification of the status quo bc having affordable housing would fuck up banks and landlords ability to derive profit from housing but lol Idc

    • StuporTrooper [he/him]
      ·
      3 years ago

      Or paying taxes.

      Oh you don't know how much you owe in taxes? We do and we aren't gonna tell. Hope you guess right lol or it will cost you.

    • Grownbravy [they/them]
      ·
      3 years ago

      “Also the bridges are crumbling beneath you, ya know, to keep things exciting.”

  • mao_zedonk [he/him]
    ·
    3 years ago

    TIL the pilot episode of the X-Files spinoff The Lone Gunmen that is basically about Trueanon investigating the deep state, the literal first episode was about the deep state doing a false flag hijacking of a jetliner to fly into the World Trade Center and it broadcast in March 2001.

    Like holy shit how 👁️👁️👁️ can reality be.

    My favourite quote from the linked page:

    The creators of The Lone Gunmen could not have had advance knowledge of 9/11

    • FidelCashflow [he/him]
      ·
      3 years ago

      If it helps, that plane plot was from an old tom clancy novel.

      Tom Clancy being thrle kinda author that writes military thrillers that militarily people like. So occasionally someone from the pentagon would tell him stuff over beers. So there is no way to know of any idea in his books is his or from the pentagon

      • mao_zedonk [he/him]
        ·
        3 years ago

        I don't know, I looked into it (I'm assuming you're talking about Debt of Honor?) and that seems pretty meaningfully different. Like that an angry Japanese jet pilot flies his plane into the Capitol Building seems to trade a lot more on racist conceptions of the Japanese as kamikaze zealots than anything else.

        • FidelCashflow [he/him]
          ·
          3 years ago

          My gut tells me that he got that from a real old head defence guy that figured it was and old enough stiry it was safe to share. But the idea of making a plane intona truck bomb style situation was bouncing around long enough that a CIA employee like Bin Laden could have got it from the defence community

  • Quimby [any, any]
    ·
    3 years ago

    Btw, today is Yom Ha'Shoah, the Holocaust Day of Remembrance. Never forget, never again.

  • OldMole [he/him]
    ·
    3 years ago

    The modern isekai genre is extremely bizarre. There are maybe fifty mangas that are nearly identical, all very focused on a protagonist that doesn't really have a personality and almost no agency in the story. What if a slight variation of the same good things that happen in all those other stories also happened at this slightly different uninteresting guy? I hope psychologists are studying this, it feels like a symptom of a society that is very unwell.

  • AtomPunk [he/him]
    ·
    3 years ago

    Can’t even post on reddit gardening subs without being condescended to by some professional tree asshole