Govt baffled over DRDO chief's claim on missile shield

Discussion in 'Strategic Forces' started by sayareakd, Jul 19, 2012.

  1. sayareakd

    sayareakd Moderator Moderator

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  3. p2prada

    p2prada Stars and Ambassadors Stars and Ambassadors

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    :lawl::lawl:

    One journo asking another journo for a quote.

    Indian journalism at its height.
     
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  4. sayareakd

    sayareakd Moderator Moderator

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    manoj joshi

    :rofl:
     
  5. sayareakd

    sayareakd Moderator Moderator

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    Mail today (Shiv Arror) too is in loop...................:rofl:
     
  6. trackwhack

    trackwhack Tihar Jail Banned

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    Where the hell in the article does anyone from the government say anything at all?

    There are a few valid facts about using the Prithvi to mimic an IRBM. Ideally we would want to test it against the Agni series. When we have shot down a few Agni 4 prime, we will be safe. What DRDO basically did was fired the Prithvi to an IRBM apogee of 120 km. That results in re-entry speeds that are very similar to IRBM re-entry speeds.

    The interception window for the PAD is 50-80 km. Which means that the Prithvi has already fallen 40-70 km from apogee. At that altitude, we are already talking about Mach 6 and above re-entry speeds. The AAD on the other hand intercepted the Prithvi at an altitude of 15km, which means 100+ km after apogee. Again, at those altitude, we are talking some serious re-entry speeds, possibly Mach 10+, even if the missile was in free fall from apogee it should reach Mach 5.
     
    Last edited: Jul 19, 2012
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  7. sayareakd

    sayareakd Moderator Moderator

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    Joshi must be asking for kiss ass amriki system to protect us.......:taunt:
     
  8. p2prada

    p2prada Stars and Ambassadors Stars and Ambassadors

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    They are a bunch of morons talking about stuff they shouldn't be talking about.
     
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  9. hit&run

    hit&run Elite Member Elite Member

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    ^ Moron is too light for them, they are Top level a$$holes. They do defence related reporting of national security interest like Page 3 Tabloid journalists, may be worst than that. One must check their bank accounts for any vested interest party payroll they are cashing out.
     
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  10. Armand2REP

    Armand2REP CHINI EXPERT Veteran Member

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    WoW... that report makes India ABM look like amateur hour.
     
  11. Bhadra

    Bhadra Defence Professionals Defence Professionals Senior Member

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    This is called "this is my file" syndrome in bureaucratic parlance.
     
  12. Virendra

    Virendra Moderator Moderator

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    Why are we not seeing some of you seasoned experts to contribute analytical articles on defense technology?
    Has any of you noticed the Indian Defense and Security Analysis home page of the site or gone through this - Announcements - Internal Security ?
    We would be grateful if you guys could do better than those journos. You have a platform to start here.

    Regards,
    Virendra
     
  13. Armand2REP

    Armand2REP CHINI EXPERT Veteran Member

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    Why is DRDO only using Prithvi at 70km range? Do some real tests.
     
  14. Ray

    Ray The Chairman Defence Professionals Moderator

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    DRDO is prone to fantasise.

    And people say they are being discriminated for foreign goods!
     
  15. Armand2REP

    Armand2REP CHINI EXPERT Veteran Member

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    Is it a better test than Black Sparrow tested by SAMP/T?
     
  16. p2prada

    p2prada Stars and Ambassadors Stars and Ambassadors

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    The Prithvi can be made to fire at an IRBM equivalent altitude. Trackwhack already explained it. As long as it is 200-300Km, then I am happy. A new PDV is being designed for interception at 150Km, so we can say Prithvi target missile will reach such altitudes if not more.

    As long as the warhead reaches IRBM type speeds of 3-4 Km/s then it demonstrates capability against IRBMs.

    Of course we don't know if such a capability was achieved.

    Black sparrow should be equivalent to what Prithvi is doing. Except that while Black Sparrows were fired from F-15s at 25Km height, Prithvi follows an actual ballistic trajectory. As long as the Black Sparrow is simulating Shabab 3, it should match Agni II.
     
  17. Apollyon

    Apollyon Führer Senior Member

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    I think current Aster 30 Block-1 can only have the ability to intercept BM with range of 900Km with up-coming Block 1 - New Technology will have the ability to intercept BM with range of 1500Km.
     
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  18. Armand2REP

    Armand2REP CHINI EXPERT Veteran Member

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    It can't exceed its max velocity and shooting at an almost vertical apogee will limit even further rentry speed. Is it Prithvi I being fired because that will limit even further.

    That is Mach 10-12. Can a Prithvi I get that fast much less do it on a near verticle apogee? I hear it is only Mach 5.

    Black Sparrow simulates Scud B at 1.4km/s rentry speed, the terminal speed of Prithvi is 1.7km/s and will go slower making a near verticle apogee at booster burnout. Just because it falls doesn't mean it will go faster... it slows down.
     
  19. sayareakd

    sayareakd Moderator Moderator

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    just saw the link posted at BR, here is something from that link of "The Hindu", Joshi should read this.....:rofl:

    Photo from the link
    [​IMG]
    you can see the spark in the eyes of Air Marshal Barbora, he is impressed with the test, even his body language says so.

    here is what Joshi said in the India Today

    Government baffled over DRDO chief's claim on missile shield : North, News - India Today

    It is high time these Jokers start doing research and start reading reputed publication rather then, just having one stupid quoting other to prove their agenda and posting their make believe stories. :rofl:
     
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  20. p2prada

    p2prada Stars and Ambassadors Stars and Ambassadors

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    You are looking at Prithvi's operational capabilities. The velocities achieved by a warhead has everything to do with gravity and not propulsion. The higher the warhead separation, the greater is the reentry velocity.

    Black Sparrows have simulated from Scuds to Shabab-3. To simulate Shabab-3, the F-15 flew to a height of 27Km before firing the missile, pretty impressive.

    Here 27Km is not an operational capability of the F-15, regardless it was achieved for tests. Prithvi and any other ballistic missile can do the same by crossing the threshold of what is perceived as normal for the system. The Prithvi being used for BMD tests don't have to be operational missiles, they would have obviously been modified specifically for the tests in order to simulate larger missiles.

    As for the math involved,

    v[SUP]2[/SUP] = u[SUP]2[/SUP] + 2as
    where v = final velocity
    u = initial velocity
    a = acc due to gravity
    s = distance.

    At heights of 200Km and considering initial velocity is zero, the velocity achieved is close to 2Km/s. Now this is only considering the warhead was merely dropped. If there was initial velocity then the speed will be greater. Add an equivalent initial speed and you have a simulated 2000Km IRBM. Air resistance plays foul too, so that needs to be catered for. I think the tests were used to simulate a 2000Km IRBM. Agni II has an apogee of 405Km and a speed of 4Km/s on reentry.

    In case of Black Sparrow we know a high initial velocity was achieved after it was fired.

    Btw, falling down against Earth's gravity increases speed, it does not slow down.

    The success of the first phase BMD highly depends on howmany batteries the IAF purchases. If the IAF buys a lot then we know the system is good enough for what we need. The problem arises only if IAF rejects the BMD.
     
  21. sayareakd

    sayareakd Moderator Moderator

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    no one else has made something which would suit our requirement of launch at very very short notice.
     

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