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    Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

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    Vann7

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  Vann7 on Sun Mar 04, 2018 9:54 pm

    kvs wrote:Putin did the right thing to put this information out.   The retards running NATO really believe that Russia has no
    technological and scientific capacity and potential.    These f*ckwads don't even have physics degrees and think
    they know all there is about physics.    In NATO we have conclusive evidence that only scum rises to the top and
    the talent of the scum is to be scum and nothing else.  

    This laser system probably has the ability to shut down all aircraft activity within some radius without using SAMs.
    That is not a trivial achievement.   SAMs take time to reach their target and can be messed around with via EM
    tricks.   A high power laser beam cannot be defeated even if hypothetically a mirror surface is used.   There is
    always some absorption just due to QM effects.    And there is no way that stealth F-22s and F-35s ware going
    to drop their RAM coatings for mirror finishes.  

    High power lasers can also take down air to surface missiles of any speed.   So Russia is developing technology that
    defeats its own innovations such as Kinzhal.    This is smart.    Yankees and their corrupt procurement process are
    going to have a hard time catching up.    

    As cool as Lasers are.. because of the pretty star wars movie like light..
    They have limitations ,get interference from clouds ,water and dust and bad weather..
    This is why to intercept Ballistic missiles ,American had to mount their lasers in a 747 plane.. to fly very high and
    by pass the weather and clouds interference ..This means that for long range targets is neccessary a plane.. and by the way the American airborn laser project failed.



    And while the Americans haven’t been very successful here, Russia’s aircraft-mounted laser has proved
    its ability to successfully fulfil the set tasks,” he added.

    https://sputniknews.com/russia/201608071044027427-russia-laser-weapons/

    But i think that the much more more advanced weapons Russia military is working ,that looks like taken from
    a science fiction movie are not their lasers weapons , but instead their indirect physical impact radio electronic weapons .. Because radio waves ,can bypass easily not only air but also solid rock ,bad weather and water too..
    WIth a powerful radio wave ,using very obscure science ,that soviets were experimenting first than anyone.. according Sputnik.. it can be used to shutdown satellites ,planes ,drones and warships.. anything and it have been confirmed by the company ,that produce them.. working on it.   It can active bombs or it can fry electronics.. and the most interesting thing about this weapons is that can be used to SEE in 3d everything.. for example spy inside a plane ,of how many people are inside and even see people faces.. even if they behind a wall.. With such weapons ,you will have a field day with NATO swarm of drones and completely neutralize hundreds if not thousands of them ,without firing a single missile or bullet. and apparently neither you need a nuclear reactor ,so much energy like lasers to make it work.

    Such weapon if released , will make look lazers like yesterday science.. Because a radio electric weapon ,can be used
    with equal effectivements to destroy electronics in air ,ground or see ,or even kill humans inside a plane ,without firing a missile. and even people inside a tank can be killed with such weapons without destroying the tank.

    https://sputniknews.com/military/201610131046285777-russia-energy-weapons/

    Such weapons will completely revolutionize modern warfare to a whole new level..
    Tanks ,planes ,satellites could be aimed equally by the same gun and the range will surpass anything..
    Terrorist that hide for example inside a house or behind a heavy rock ,could be killed without firing a shot.. just by radiating with lethal radio waves them.. Mines fields could be cleared fast by aiming the radio beam..
    there are endless possibilities..
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    gaurav

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  gaurav on Mon Mar 12, 2018 4:10 pm

    http://interfax.com/newsinf.asp?pg=7&id=815802

    Russian combat lasers can destroy hostile targets - Defense Ministry
    MOSCOW. March 12 (Interfax-AVN) - Combat laser weapons capable of disarming enemy capabilities and destroying
    hostile targets were supplied to the Russian army last year, Deputy Defense Minister Yury Borisov told the ministry's newspaper Krasnaya Zvezda in an interview.

    "Our nuclear scientists have learned how to concentrate energy required for destroying relevant enemy weapons instantly, in a split second," Borisov said.

    "Laser weapons capable of disarming capabilities of the potential enemy and destroying every target of the laser beam were commissioned last year," he said.

    "I think the dynamics of achievements, especially in the field of weapons based on new physical principles, has gained pace," Borisov said.
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    GarryB

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  GarryB on Tue Mar 13, 2018 7:00 am

    As I look through this thread I see some confused posts... can I point out that some of you are talking about airborne laser systems, while others are talking about the truck based system revealed by Putin recently.

    Each has different roles and therefore are not really comparable.

    As pointed out the ground based system is likely designed to defend ground targets so it makes sense for it to be ground based... it will likely operate with other air defence systems including short and long range missiles and perhaps even guns...

    The air based system is intended for defeating strategic recon assets... not that includes satellites, but unlike the US airborne laser which was supposed to blow away ICBMs during their initial launch stage, this is a Russian system more likely being used to damage sensors and equipment on US satellites and also likely spy planes and UAV drones. It does not need to shoot anything down... a spy with destroyed optics and damaged electronics is much less of a threat, without filling earth orbit with debris.

    And yes, they already have lasers powerful enough, and for those suggesting clouds might be an issue... they would certainly defeat a visible light laser, but an xray laser or gamma ray laser would pass right through...
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    George1

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  George1 on Tue Mar 13, 2018 7:44 am

    Airborne laser thread is here:
    A-60 Airborne Laser weapon

    Ground-based laser mentioned by Putin is a different system
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    The-thing-next-door

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  The-thing-next-door on Tue Mar 13, 2018 11:09 am

    Could anyone maybe explain the mount for the ground based "laser" that was unveiled recently it does not seem to make any sense.

    Why would it need more than just horizontal traverse and vertical elevation?
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    kvs

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  kvs on Tue Mar 13, 2018 4:26 pm

    The-thing-next-door wrote:Could anyone maybe explain the mount for the ground based "laser" that was unveiled recently it does not seem to make any sense.

    Why would it need more than just horizontal traverse and vertical elevation?

    It looks like it is designed to cover hemispheres. The laser seems to be designed as a last and best defense against any air attack for ground
    based systems. The S-400/500 can cover over the horizon incoming threats. But a laser system with enough power is guaranteed to
    take out anything that manages to get through. Including hypersonic missiles.
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    The-thing-next-door

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  The-thing-next-door on Tue Mar 13, 2018 5:17 pm

    kvs wrote:
    The-thing-next-door wrote:Could anyone maybe explain the mount for the ground based "laser" that was unveiled recently it does not seem to make any sense.

    Why would it need more than just horizontal traverse and vertical elevation?

    It looks like it is designed to cover hemispheres.    The laser seems to be designed as a last and best defense against any air attack for ground
    based systems.    The S-400/500 can cover over the horizon incoming threats.    But a laser system with enough power is guaranteed to
    take out anything that manages to get through.   Including hypersonic missiles.  

    That still does not answer the question of why it has such a wierd mount.
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    GarryB

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  GarryB on Tue Mar 13, 2018 10:10 pm

    Why would it need more than just horizontal traverse and vertical elevation?

    What are you talking about?

    The roof slides back and the system can spin in the horizontal axis 360 degrees and can elevate vertically from what appears to be pointing straight down (presumably when not in use) to pointing straight up... what more would you need?
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    GunshipDemocracy

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  GunshipDemocracy on Tue Mar 13, 2018 11:54 pm

    The-thing-next-door wrote:
    That still does not answer the question of why it has such a wierd mount.

    and what's weird there?  It can traverse horizontally/vertically and initial position is securing it during transportation?





    kvs wrote:  But a laser system with enough power is guaranteed to
    take out anything that manages to get through.   Including hypersonic missiles.  

    Then power issue is interesting - hypersonic missile flies in thousands degrees hot plasma . Not sure how plasma physics works if you apply laser to it? is going though or just warm sup the whole plasma cloud?
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    The-thing-next-door

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  The-thing-next-door on Wed Mar 14, 2018 6:58 pm

    GarryB wrote:
    Why would it need more than just horizontal traverse and vertical elevation?

    What are you talking about?

    The roof slides back and the system can spin in the horizontal axis 360 degrees and can elevate vertically from what appears to be pointing straight down (presumably  when not in use) to pointing straight up... what more would you need?

    So you think the aditional axis of rotation is just to alowt it to fold up neatly when not in use?

    Does anyone know why they di not just make it one long tube or even better have the laser stretch along the entire lenth of the trailer and be directed by mirrors?
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    GarryB

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  GarryB on Wed Mar 14, 2018 11:20 pm

    Then power issue is interesting - hypersonic missile flies in thousands degrees hot plasma . Not sure how plasma physics works if you apply laser to it? is going though or just warm sup the whole plasma cloud?

    That reentry vehicle was design to operate at temperatures for a certain number of seconds or minutes in the atmosphere... applying a laser beam to add temperature to just one part of it rapidly is rather likely to cause problems... look at what happened to the space shuttle when one heat tile was damaged/removed.

    It does not need to blow the munition completely to pieces... just creating a hairline weakness or crack would be enough for the environment it is in to destroy it rapidly...

    I remember reading some science fiction that predated the whole idea of laser beams and it was stated with vigour that energy weapons were pointless because it was perfectly logical that any level of energy powerful enough to kill your enemy would kill you first. They had not thought of the idea of concentrated directed energy weapons... An EM weapon could pass through a heat shield shell and destroy the electronics inside that actually make it work... turning it into a kinetic weapon... a dud.


    Does anyone know why they di not just make it one long tube or even better have the laser stretch along the entire lenth of the trailer and be directed by mirrors?

    Inside earths atmosphere? Because any spot of dust or dirt on the mirror and the focused energy would destroy the mirror... and no mirror is perfect... every mirror or prism you use reduces the power of the beam.

    So you think the aditional axis of rotation is just to alowt it to fold up neatly when not in use?

    What are you talking about? It has two axis of movement... 360 degrees around so it can point in any direction of the compass, and up and down so it can point up and down at targets coming from different angles...

    Here is a screen shot... Axis A spins around horizontally and Axis B aims the laser up and down... in other words the same traverse elevation options any self propelled gun uses to aim at targets coming from any direction at any elevation.

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  GunshipDemocracy on Thu Mar 15, 2018 12:22 am

    GarryB wrote:
    Then power issue is interesting - hypersonic missile flies in thousands degrees hot plasma . Not sure how plasma physics works if you apply laser to it? is going though or just warm sup the whole plasma cloud?

    That reentry vehicle was design to operate at temperatures for a certain number of seconds or minutes in the atmosphere... applying a laser beam to add temperature to just one part of it rapidly is rather likely to cause problems... look at what happened to the space shuttle when one heat tile was damaged/removed.

    It does not need to blow the munition completely to pieces... just creating a hairline weakness or crack would be enough for the environment it is in to destroy it rapidly...


    1) Laser weapon needs time and energy to get THROUGH ball of plasma to any place. (aka laser beam propagation in Plasma). What percentage of energy will be lost? de-focused?
    2) materials from which Avangard is built must have some "security coefficient" designed on top of "working temperature" . Of course damging in shuttle style is end to anything but first you need to get there for enough long time and stay focused. And it flies 20mach...


    3) As for EM weapons - a Faraday's cage?




    Here is a screen shot... Axis A spins around horizontally and Axis B aims the laser up and down... in other words the same traverse elevation options any self propelled gun uses to aim at targets coming from any direction at any elevation.


    did you make those arrows? ugly handwrite Laughing Laughing Laughing
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    kvs

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  kvs on Thu Mar 15, 2018 1:32 am

    I was referring to lower atmosphere hypersonic missiles such as the Kinzhal. Such missiles will not have a thick layer of plasma
    around them and will likely not have 2000 C rates materials.

    The effectiveness of the laser is a function of its power. It has the market for speed of interception cornered for all time.
    There is no point building a military laser that takes a long time to damage surfaces. So any military laser will have

    1) a very narrow beam diameter by design. This allows for concentration of energy over a very small area of the intercepted
    target and hence maximizing of the damage

    2) a lot of power so that it will go through a human like a hot knife through butter. In fact any energy absorbing material
    will be penetrated fast.

    I bet they test these lasers on the tiles used for the Buran and the US shuttles.
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    The-thing-next-door

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  The-thing-next-door on Thu Mar 15, 2018 7:32 am

    GarryB wrote:

    What are you talking about? It has two axis of movement... 360 degrees around so it can point in any direction of the compass, and up and down so it can point up and down at targets coming from different angles...

    Here is a screen shot... Axis A spins around horizontally and Axis B aims the laser up and down... in other words the same traverse elevation options any self propelled gun uses to aim at targets coming from any direction at any elevation.


    Well then could you explain how it would elevate or depress its main weapon when pointing sideways?

    I really cannot believe that you came up with that anyone can see that you cannot have the traverse after the elevation.
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    flamming_python

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  flamming_python on Thu Mar 15, 2018 12:01 pm

    The-thing-next-door wrote:Well then could you explain how it would elevate or depress its main weapon when pointing sideways?

    I really cannot believe that you came up with that anyone can see that you cannot have the traverse after the elevation.

    That big mount it's on will turn to the side, and then the articulation connecting the mount to the the actual laser installation can rotate clockwise or counter-clockwise in order to depress or elevate the laser as needed.
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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  The-thing-next-door on Thu Mar 15, 2018 1:18 pm

    flamming_python wrote:
    The-thing-next-door wrote:Well then could you explain how it would elevate or depress its main weapon when pointing sideways?

    I really cannot believe that you came up with that anyone can see that you cannot have the traverse after the elevation.

    That big mount it's on will turn to the side, and then the articulation connecting the mount to the the actual laser installation can rotate clockwise or counter-clockwise in order to depress or elevate the laser as needed.

    My thoughts exacly but gary seems to think otherwise.
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    gaurav

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  gaurav on Thu Mar 15, 2018 1:56 pm

    GarryB wrote:Each has different roles and therefore are not really comparable.

    As pointed out the ground based system is likely designed to defend ground targets so it makes sense for it to be ground based... it will likely operate with other air defence systems including short and long range missiles and perhaps even guns...

    People started posting all data in this thread as it is convenient to gather all posts at one place.
    discussion on airborne laser and ground based laser have common technical aspects.


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    GarryB

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  GarryB on Fri Mar 16, 2018 12:32 am

    And it flies 20mach...

    The moon moves faster yet I can keep a camera pointed at it easily enough...

    did you make those arrows? ugly handwrite

    Would normally have used photoshop and made it pretty for you, but as I have ditched windows and I am using Mint Linux I had to use GIMP, which I am not really that familiar with yet.

    My thoughts exacly but gary seems to think otherwise.

    I thought it was too obvious to mention...

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    GunshipDemocracy

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  GunshipDemocracy on Tue Mar 20, 2018 1:20 am

    GarryB wrote:
    And it flies 20mach...

    The moon moves faster yet I can keep a camera pointed at it easily enough...


    Taking into account that moon has like 12 hours to travel over your head and it's considerable size there is a better comparison. Can you film a gun bullet travelling with say 340 m/s? and it's 20x slower then Avangard and flies in easy to calculate trajectory?

    Imagine how precise must have be servos to move laser optics to hit something like 1x5meters rockst coming with 1,800m/s say 10 kilometers away?





    did you make those arrows? ugly handwrite

    Would normally have used photoshop and made it pretty for you, but as I have ditched windows and I am using Mint Linux I had to use GIMP, which I am not really that familiar with yet.


    respekt respekt respekt  just admit it, it's ugly respekt respekt respekt


    Last edited by GunshipDemocracy on Wed Mar 21, 2018 12:11 am; edited 1 time in total
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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  GunshipDemocracy on Wed Mar 21, 2018 12:09 am

    Imagine now US is talking about Space militarization. And Russian scientists are peacefully working on lasers to explode meteorites. So far 200m diameter was modeled but did ever US field bigger station? I mean meteorite of course? welcome welcome welcome


    Eureka-alert claims this was from MIPT too Smile








    Russian physicists make toy asteroids and blast them with a laser

    MOSCOW INSTITUTE OF PHYSICS AND TECHNOLOGY


    A large team of Russian researchers from Rosatom, joined by three MIPT physicists, has modeled the impact of a nuclear explosion on an Earth-threatening asteroid. They manufactured miniature asteroids and blasted them with a laser. The modeling technique developed in this study is a way of experimentally evaluating asteroid destruction criteria such as the explosion energy needed to eliminate a dangerous object on a collision course with Earth. The English translation of the paper reporting the results will appear in the upcoming issue of the Journal of Experimental and Theoretical Physics.

    Asteroids are celestial bodies consisting of carbon, silicon, metal, and sometimes ice. Scientists usually classify objects larger than 1 meter as asteroids, although this lower limit is disputed. On the other end of the scale, asteroids get as big as 900 kilometers across. Traveling at 20 kilometers per second, such giants pose a threat of obliterating all life on Earth.

    There are two basic options when it comes to protecting the planet from a collision with an asteroid: It either has to be deflected or blown into pieces most of which will miss us or burn up in the atmosphere. The authors of the paper explored the second option by modeling the effects of a powerful shock wave released by a nuclear explosion on the asteroid surface. The research team showed that a brief laser pulse aimed at a miniature replica of an asteroid produces destructive effects similar to those of a nuclear explosion on an actual space rock. The distributions of heat and pressure predicted for the real event generally matched those measured in the scaled-down experiment.

    For their laser model to be accurate, the researchers made sure the density and rigidity of the small-scale asteroid -- and even its shape -- mimicked the real thing, and controlled the shock-wave pressures. Thanks to this precise correspondence, the researchers had a way of directly calculating the required energy of a nuclear explosion on the actual asteroid from the energy of a laser pulse destroying its miniature replica. Thus, for example, to eliminate a 200-meter asteroid, the bomb needs to deliver the energy equivalent of 3 megatons of TNT. This was calculated once the team measured that it took a 500-joule laser pulse to destroy a model 8-10 millimeters in diameter. For the sake of comparison, the most powerful explosive ever detonated -- Tsar Bomba, or "king of bombs," built by the Soviet Union in 1961 -- had an energy output of about 58.6 megatons, though accounts vary.

    The research team came up with a technology for manufacturing artificial asteroid material. Its composition corresponds to that of the chondrite (stony) meteorites, which account for about 90 percent of asteroid remains reaching the surface of the Earth. The properties of the model asteroid, including its chemical composition, density, porosity, and rigidity, were adjusted during manufacturing. The replicas were made using the data on the chondrite meteorite recovered from the bottom of Lake Chebarkul. It is the largest fragment of the asteroid that entered the Earth's atmosphere in February 2013, exploding over Chelyabinsk Oblast, Russia. The asteroid material was manufactured using a combination of sedimentation, compression, and heating, imitating the natural formation process. Out of cylinder-shaped samples, imitation asteroids of various shapes were made, among them spherical, ellipsoidal, and cubical ones.

    To confirm that their laser modeling fits in with reality, the researchers also did compressible flow calculations. They showed that a lab asteroid 14-15 orders of magnitude less massive than its space prototype requires almost twice as much energy per unit mass to be completely disrupted.

    The experiments made use of three laser devices: Iskra-5, Luch, and Saturn. The laser beam was first amplified to a predetermined power and then directed at the asteroid replica fixed in a vacuum chamber. Model destruction was monitored from behind as well as from the side, and fragmentation dynamics were registered. The laser affected model asteroids for 0.5-30 nanoseconds.

    To estimate asteroid destruction criteria, researchers analyzed the data available from the Chelyabinsk meteorite. It entered the Earth's atmosphere as a 20-meter asteroid and fractured into small fragments that caused no catastrophic damage. It therefore makes sense to say that a 200-meter asteroid has been eliminated if it is fractured into pieces with a diameter 10 times smaller and a mass 1,000 times smaller than the Earth-threatening rock itself. For obvious reasons, this conclusion only holds for a 200-meter asteroid entering the atmosphere at a similar angle and for fragments traveling along trajectories similar to that of the Chelyabinsk meteor.

    The researchers were also interested in whether the explosion effect is cumulative -- that is, can one powerful explosion be replaced by a succession of smaller ones? They found that multiple weaker laser pulses provide no significant advantage over a single pulse combining their power in terms of the general destruction criterion. This holds for simultaneous as well as consecutive pulses.

    In some of the experiments, the laser was targeted at a cavity made in the miniature asteroids ahead of time. By exploiting the cavity, the researchers spent less energy -- namely, 500 instead of 650 joules per gram. Similarly, the effect of a buried nuclear bomb is expected to be more pronounced.

    Calculations accounting for the scaling effects indicate that it takes a 3-megaton bomb to eliminate an Earth-threatening nonmetallic asteroid measuring 200 meters across. The research team now plans to expand the study by experimenting with asteroid replicas of different composition, including those containing iron, nickel, and ice. They also intend to identify more precisely how the shape of the asteroid and the presence of cavities on its surface affect the general destruction criterion.

    "By accumulating coefficients and dependencies for asteroids of different types, we enable rapid modeling of the explosion so that the destruction criteria can be calculated promptly. At the moment, there are no asteroid threats, so our team has the time to perfect this technique for use later in preventing a planetary disaster," says study co-author Vladimir Yufa, an associate professor at the departments of Applied Physics and Laser Systems and Structured Materials, MIPT. "We're also looking into the possibility of deflecting an asteroid without destroying it and hope for international engagement."
    ###
    https://www.eurekalert.org/pub_releases/2018-03/miop-rpm031318.php






    The paper reporting the results of the study was published in the Russian edition of the Journal of Experimental and Theoretical Physics by a team of researchers from Rosatom -- a Russian atomic power state corporation -- as well as from MIPT and the Space Research Institute of the Russian Academy of Sciences. The two Rosatom institutes involved in the study are the All-Russian Scientific Research Institute of Experimental Physics and the Troitsk Institute for Innovation and Fusion Research.



    and now we know why so little quotations liberals find in US journals.

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  kvs on Wed Mar 21, 2018 6:26 am

    Silly journalists never gave us the scaling relation. What would it take to destroy a 2000 m metorite? Looks like something much bigger
    than Tsar Bomba will be needed. Nuclear devices in this class are very poorly researched. Tsar Bomba failed its predicted yield by over
    40%. Who says military development is bad: we need more development of nukes in the 100s of megatons sizes. Being able to build
    a 1 teraton device would be rather worthwhile.

    Not only do you get to wipe out some exceptionalist cancer afflicting the planet in one stroke, you also can save the planet from an extinction
    class meteorite.
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    The-thing-next-door

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  The-thing-next-door on Wed Mar 21, 2018 7:06 am

    kvs wrote:Silly journalists never gave us the scaling relation.   What would it take to destroy a 2000 m metorite?    Looks like something much bigger
    than Tsar Bomba will be needed.     Nuclear devices in this class are very poorly researched.   Tsar Bomba failed its predicted yield by over
    40%.   Who says military development is bad: we need more development of nukes in the 100s of megatons sizes.    Being able to build
    a 1 teraton device would be rather worthwhile.  

    Not only do you get to wipe out some exceptionalist cancer afflicting the planet in one stroke, you also can save the planet from an extinction
    class meteorite.  

    The RDS-220 was modified in order to reduce its blast yeal form 100 megatons to 50 in order for the pilotys that dropped it to survive.
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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  GunshipDemocracy on Wed Mar 21, 2018 9:46 am

    kvs wrote:Silly journalists never gave us the scaling relation.   What would it take to destroy a 2000 m metorite?    Looks like something much bigger
    than Tsar Bomba will be needed.     Nuclear devices in this class are very poorly researched.   Tsar Bomba failed its predicted yield by over
    40%.   Who says military development is bad: we need more development of nukes in the 100s of megatons sizes.    Being able to build
    a 1 teraton device would be rather worthwhile.  

    Not only do you get to wipe out some exceptionalist cancer afflicting the planet in one stroke, you also can save the planet from an extinction
    class meteorite.  

    Well this was actually scientific project. 200m isfirst iteration IMHO. They must first walk before they can run. For me anyway this is interesting as "dual use" technology and since Rosatom is in perhaps it has something to do with nuclear generators too...






    The-thing-next-door wrote:
    The RDS-220 was modified in order to reduce its blast yeal form 100 megatons to 50 in order for the pilotys that dropped it to survive.

    I think this is just a proof of concept. If it works against aircraft carriers or satellites same way I dont know yet but we might see some day Smile
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    GarryB

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  GarryB on Thu Mar 22, 2018 6:11 am

    Imagine how precise must have be servos to move laser optics to hit something like 1x5meters rockst coming with 1,800m/s say 10 kilometers away?

    Very high precision, though as mentioned in the original post about it the guy said the very high energy means it does not need time to build up energy to damage the target...

    A target moving at that speed will not be jumping around like a gymnast... it will largely be moving in a straight line with the potential for slight deviations... cameras can auto track targets already so it is not like someone has to manually track these things... computers can be fast and very precise...

    just admit it, it's ugly

    Your just a bully... Razz

    I am overweight too... so my doctor tells me... 122kgs isn't that bad is it?

    Traveling at 20 kilometers per second, such giants pose a threat of obliterating all life on Earth.

    That is probably where our friend got the 20000m/s from... a deep space object stuck in our solar system...

    Regarding falling warheads... at about 400km altitude the orbital speed is about 7.4km/s so if it is travelling faster than this it will not fall it will move to a higher orbit. If it starts falling from that height at that speed... ie pointed downwards then its acceleration due to gravity will be 9.8m/s/s.

    At 7.4km/s it will cover 400km in less than a minute... and a minute is 60 seconds, so 9.8++ times 60 is ... well 60 times 10 is 600m/s faster... so falling from 400km from a moving start at 7.4km/s when it hits the ground the fastest it could be moving would be 8km/s... except at about 100km altitude it hits the upper reaches of the atmosphere which starts to slow it down... by 30km or so the air becomes thick enough for some aircraft to fly so it probably generates enough drag to counter the pull of gravity... so it would be moving at less than 8km/s on impact.

    Not only do you get to wipe out some exceptionalist cancer afflicting the planet in one stroke, you also can save the planet from an extinction
    class meteorite.

    Not really... there are different types of asteroid... if it is what is called a rubble asteroid... rocks held together by the mass of all the other rocks in the pile and ideal strike that detonates in the centre of mass will just spread the rocks out... but they will all be moving on the same trajectory as before and will fall back into the same but now radioactive pile... if it is 2km across it wont matter what it is made of the mass alone will be enough for a planet wide extinction event... if the bits are still coming together again then you get a shotgun blast instead of a single hit... it will just spread the damage over a much greater area...

    Ironically it would actually be most efficient to land a vehicle on the problem asteroid and get it to dig up material from the asteroid itself and then launch it at a carefully calculated direction and speed... and keep throwing more mass until the asteroid changes direction and falls into Jupiter or the Sun, or just moves into a safe orbit...

    Later on such technology could be used for mining... have a vehicle dig through the surface and find minerals and material inside to see if it has any value... then launch it at a speed to land on the moon... with the right calculation you might even be able to launch an orbital spacecraft to intercept and catch it... it might take 5 years for it to arrive...

    Regarding explosives it really depends on the shape and spin and composition of the target... a warhead embedded in one side a few hundred metres deep could vapourise and blow off enough material in one direction to change the trajectory of the rest of the asteroid so that it misses this time... but unless the change is radical or makes it fly into the sun or jupiter or some other object then it will just come around again... whether it is in 50 years or 50,000 years...

    Think of it as being very like a bullet... the problem is that while a rifle bullet will stop a human coming at you... it wont stop a train... and it would definitely not stop a mountain falling on you... even really big bullets don't really change things when we are talking about really big objects.
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    Big_Gazza

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

    Post  Big_Gazza on Thu Mar 22, 2018 11:44 am

    kvs wrote:Tsar Bomba failed its predicted yield by over 40%.  

    Not true. The Tsar Bomb was a 3-stage weapon, and for test purposes, the 3rd stage uranium tamper was replaced with lead. They wanted to reduce the blast by approx half so that the aircraft dropping the weapons would survive the blast, and to prevent excessive fallout on Soviet territory. If they tested with the full deal, it would have reached the 100mT level.

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    Re: Directed-Energy Weapons | EM, Microwave, Laser, Sonic |

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