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DDE

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Posts posted by DDE

  1. Detailed pics on the new Russian air defense decoy drone have just dropped. Orlan-10 was widely mocked for using the cap of a 5-liter water bottle as part of its fuel system, but here we see a an actual 5-liter bottle as fuel tank held in place by duct tape.

    https://t.me/xronikabpla/4752

    Looks like it's a simplification from an earlier pattern.

    Spoiler

    382198_O.jpg

    There is a perverse beauty in these things looking so WWI.

  2. 7 hours ago, magnemoe said:

    Guided missiles on earth uses fins to aim and unless ballistic they need to burn until they hit

    They generally don't AFAIK. Even the smallest ones have a ballistic cruise stage where they still have enough impulse to maneuver after their target.

    Anyway, this is the usual artwork of a Soviet Kaskad space missile

    original.gif

    And this is probably the actual Shchit-2

    max_g480_c12_r16x9_pd10

    The central array is best understood as a combination microthruster block and warhead. The whole thing is spin-stabilized and probably heat-seeking.

    max_g480_c12_r16x9_pd10

  3. 5 hours ago, magnemoe said:

    The original Gatling was feed from the top, the 40 mm AA gun famous from WW 2 was also feed from the top with clips. 

    The largest clip-based loading system I know of is an 82 mm automatic mortar, and it ties with the various 57 mm cousins of Bofors (S-60 is having a new lease of life as of late). Technically there also was a Swedish 155 mm gun, but there you'd use a crane.

  4. On 6/8/2023 at 10:36 PM, Shpaget said:

    Haven't seen the movie, but the trailer is chock-full of bad stuff.

    "I've got a shadow moving across the front of the Moon, and it's not Earth." Too bad it was not Earth, it would have saved the studio some embarrassment., but speaking of shadows, that looks like a terminator, not a shadow of another object.

    "This object is roughly the size of a city." Yet the shadow easily covers entire Moon

    That shuttle like vehicle takes off without the main engines firing. but keeps all four boosters and the external tank all the way up to the "meteor".

    They are hit by a giant rock, but deploying a repair bot will fix it, I suppose.

    Shooting guns at asteroids?

    If Armageddon and Deep Impact had a baby, and then abused it, neglected it and beat t with a stupid stick.

    So bad I want to hate-watch it...

    What is it with the recent wave of bad asteroid movies?

  5. 1 hour ago, SunlitZelkova said:

    2. Are computers necessary for spaceflight, or would it be possible without them? Just more difficult and dangerous of course.

    AFAIK early WWII electromechanics are roughly sufficient, with most of the advancement being in soecialized gyros. Most orbital computation work was double-checked by humans, so early XXth century tech was adequate. So, I'd say yes.

    Therefore,

    1 hour ago, SunlitZelkova said:

    1. Does a space program need to start with automated spaceflight, or could it have theoretically started with crewed spaceflight in the same way we went from small gliding models to airplanes?

    Technologically, this seems possible. But evolutionarily? There are two big hurdles to clear: first, the leap from small model rockets to V-2 or something else large enough to carry humans, and then the leap from V-2 to effective surborbital and orbital rockets. That's a heck of a lot to leapfrog through in order for crewed spaceflight to have an advantage. What's more, funding becomes an issue: V-2 only hapenned because someone throw money at it as a military technology; without it, it's not immediately clear how amateur rocket societies would have evolved out of small rocketry.

  6. I must congratulate [Florida presidential candidate redacted] because his staffers just made history for him with the first confirmed AI-generated political photographic smear. Truly groundbreaking. Absolutely not political suicide.

  7. 6 hours ago, StrandedonEarth said:

    So Boston Dynamics has put SPOT  on the market at $75k, IIRC. They reallly need to make that chassis mass-producible to bring the cost down by a couple of orders of magnitude.

    Unitree Go1 is marketed at $2700.

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