+ Reply to Thread
Page 11 of 12 FirstFirst ... 2 3 4 5 6 7 8 9 10 11 12 LastLast
Results 151 to 165 of 173

Thread: Carrier killers (an article from JED online)

  1. #151
    Staff Emeritus
    Join Date
    03 Aug 03
    Posts
    16,429
    Country: Switzerland
    Alas, you are right, two 'air to surface missiles' clearly have nothing in common.

    LOL....just STFU and pass me the vodka you G-damned whining Russian troll...i need a drink.

  2. #152
    Senior Contributor lurker's Avatar
    Join Date
    12 Aug 03
    Posts
    773
    Quote Originally Posted by M21Sniper View Post
    Alas, you are right, two 'air to surface missiles' clearly have nothing in common.

    LOL....just STFU and pass me the vodka you G-damned whining Russian troll...i need a drink.
    I am trying to slow down on vodka :( My girl have something against it, so only beer for me now ;/

  3. #153
    Defense Professional
    Join Date
    18 Jun 04
    Posts
    1,632
    Just came back from the meeting with a friend who was working in RKK Energia. He said to me that Reshetneva has finished land testing fo the new satelite for the Legenda system. It has 2 times less weight!!! It can be used on the low altitude up to 6 years!!! Its reactor is updated - in the past the whole satelite was parked on a higher altitude.... now reactor module can be separated at the end of the service and only this module is to be parked on higher altitude while main body of the satellite destroys on its way down.

    This let them save a lot of weight for fuel for sustaining low orbit for a period not less than 4 years and up to 6 years in good case scenario. The cost of each sattelite grew significantly but the launch cost and total program cost reduces DRAMATICALLY as much less satelites would need to be replaced annually.

    One more thing - Legenda would not be only targetting any more.... it would have lot more functions to share its budget.

    Seems like NAVY wants to relaunch the program observing oceans
    Last edited by Garry; 14 Dec 06, at 09:57.

  4. #154
    Registered User
    Join Date
    18 Aug 05
    Posts
    129
    Quote Originally Posted by lurker View Post
    I am trying to slow down on vodka :( My girl have something against it, so only beer for me now ;/
    Damned, I sweared you were gay!

  5. #155
    Military Professional Master Chief's Avatar
    Join Date
    07 Nov 06
    Location
    USA
    Posts
    201
    Country: United States
    The US navy needs to get its head out of its own ass! As for the A Chinese submarine stalked a U.S. aircraft carrier battle group in the Pacific last month and surfaced within firing range of its torpedoes and missiles before being detected, Now back when I was in the navy, during the cold war years and for some time after this would have never happened! Why? The russians kept us sharp! We drilled and drilled time after time. There is a thirty mile kill zone around each and every carrier. Where no sub, ship or sub should not get into, with out escort. And the navy cutting back on surface ships is ********. Also back then there was more then one class of cruiser, and more then two class of destroyers. Yea what do we have now the A. Burks and the Zumwalts. and now just one class of frigate the O.H. Perry.

  6. #156
    Defense Professional
    Join Date
    18 Jun 04
    Posts
    1,632
    Quote Originally Posted by Francois View Post
    Damned, I sweared you were gay!
    Lets hope your other beliefs are closer to reality

  7. #157
    Defense Professional
    Join Date
    18 Jun 04
    Posts
    1,632
    Quote Originally Posted by Master Chief View Post
    The US navy needs to get its head out of its own ass! As for the A Chinese submarine stalked a U.S. aircraft carrier battle group in the Pacific last month and surfaced within firing range of its torpedoes and missiles before being detected, Now back when I was in the navy, during the cold war years and for some time after this would have never happened! Why? The russians kept us sharp! We drilled and drilled time after time. There is a thirty mile kill zone around each and every carrier. Where no sub, ship or sub should not get into, with out escort. And the navy cutting back on surface ships is ********. Also back then there was more then one class of cruiser, and more then two class of destroyers. Yea what do we have now the A. Burks and the Zumwalts. and now just one class of frigate the O.H. Perry.
    The GLONAS is covering Eurasia... and it is going to be fully operational by 2010.... open for commercial use since 2009....

    Assuming that new LEGENDA requires around 24 satelites.... if the prototype which is tested now proves operational... I guess Reshetneva can not manufacture more than 6 new Legenda satelites per year... so 4 years or more needed to restore system to cover the globe... I guess they would start with areas close to Russian shores.

    Again... the secret of the long survavability of the new satelites is separation of reactor module. Legenda satelites could not be abandonned to fall down because of nuclear reactor. Hence they were quite heavy due to requirement to park them on higher orbit at the end of operation... This required A LOT OF FUEL to boost it up at the end. One the low orbit one needs spendng a lot of fuel to keep the orbit... and even more if you are heavy...

    Now the circle is broken. Only reactor is going to be parked.... => less fuel for parking lighter weight... => less weight less fuel for keeping orbit => longer time you may stay on the low orbit with the same fuel => less frequent replacement launches => system gets MUCH cheaper.

  8. #158
    Global Moderator Defense Professional
    Join Date
    30 May 06
    Posts
    997
    Country: Australia
    Quote Originally Posted by Garry View Post
    The GLONAS is covering Eurasia... and it is going to be fully operational by 2010.... open for commercial use since 2009....

    Glonas is not a full constellation - and it won't be a completely global system by 2010. There aren't enough sats in the constellation to provide full global race track redundancy.

    Going on current russian track records for launching, they won't get the requisite number of sats up for quite a while.

    Their marketing people certainly deserve a bonus though....

  9. #159
    Defense Professional Dreadnought's Avatar
    Join Date
    12 May 05
    Location
    Philadelphia, PA.
    Posts
    13,520
    Country: United States
    Quote Originally Posted by M21Sniper View Post
    Alas, you are right, two 'air to surface missiles' clearly have nothing in common.

    LOL....just STFU and pass me the vodka you G-damned whining Russian troll...i need a drink.
    LMAO
    Fortitude.....The strength to persist...The courage to endure.

  10. #160
    Defense Professional
    Join Date
    18 Jun 04
    Posts
    1,632
    Quote Originally Posted by gf0012-aust View Post
    Glonas is not a full constellation - and it won't be a completely global system by 2010. There aren't enough sats in the constellation to provide full global race track redundancy.

    Going on current russian track records for launching, they won't get the requisite number of sats up for quite a while.

    Their marketing people certainly deserve a bonus though....
    They have 18 now - hence they lack 6 sats. I don't know what is replacement need for the near future..... those low orbit sats are not living long.... Next year they budgeted 50% growth in millitary launches, but we don't know what they would launch.

  11. #161
    Ex-Wabber Defense Professional
    Join Date
    10 Dec 04
    Posts
    7,029
    Country: United States
    Quote Originally Posted by Garry View Post
    They have 18 now - hence they lack 6 sats. I don't know what is replacement need for the near future..... those low orbit sats are not living long.... Next year they budgeted 50% growth in millitary launches, but we don't know what they would launch.
    Hi Garry. 16 in their slots, not 18. Only 11 of which are operating. 6 in Plane 1 and 5 in Plane 3. Plane 2 is empty. This is a decrease of 4 active sats since April 2006, There have been a total of 5 dropouts since July, and one (783) was brought back online but is living on borrowed time- it is over 5 years old, and the grandaddy of the bunch.

    There were 3 sats launched in 2005, 2 of which are working (one dropped out about 3 weeks ago). No new Glonass sats were launched in 2006.

    Of the 16 sats, 9 are at or beyond their service life, 2 will reach that mark in 2007, and 1 more in 2008. At least 6, and most likely 8 of the active sats will dropout by 2010. Of the 5 inactive ones, only 1 (714) has any real chance of getting back to active status and surviving until 2010.

    So to have a full Constellation by 2010, you will need to launch minimum 20 new sats, as there are only 4 Glonass-M variant in place today. And that's assuming 714 comes back online, and hasn't suffered a major failure.

    I have to question if the launch schedule can even keep pace with the dropouts, let alone build up to full operational status. They are certainly going down faster than they are going up...

    edit to add: I just found out that another Glonass sat has been malfunctioning since December 17. R04 (795) is observed on the wrong frequency and broadcast messages are not available. The Glonass website is still listing it as active, but JPL has classified it as unusable.
    Last edited by highsea; 27 Dec 06, at 20:19.
    "We will go through our federal budget – page by page, line by line – eliminating those programs we don’t need, and insisting that those we do operate in a sensible cost-effective way." -President Barack Obama 11/25/2008

  12. #162
    Official Thread Jacker Senior Contributor gunnut's Avatar
    Join Date
    27 Jan 06
    Location
    DPRK, Demokratik People's Republik of Kalifornia
    Posts
    21,322
    Country: United States
    Do we replace our satellites every year, or when they stop working? How many are up there? What do you think of the new European system, the Galileo (I think)?
    "Only Nixon can go to China." -- Old Vulcan proverb.

  13. #163
    Ex-Wabber Defense Professional
    Join Date
    10 Dec 04
    Posts
    7,029
    Country: United States
    Quote Originally Posted by gunnut View Post
    Do we replace our satellites every year, or when they stop working? How many are up there?
    Are you referring to GPS sats or just in general?
    Quote Originally Posted by gunnut View Post
    What do you think of the new European system, the Galileo (I think)?
    It does basically the same thing as GPS, but by a bigger committee, lol.

    Garry- how did the Christmas Day launch go? This will add 3 Glonass-M sats if everything works as planned. They should come online sometime mid-2007.

    If the schedule is followed, there will be 6 launched in 2007, and 5 more in 2008. This would give 18 total sats by mid-2009 assuming 714 comes back up and there are no failures.
    "We will go through our federal budget – page by page, line by line – eliminating those programs we don’t need, and insisting that those we do operate in a sensible cost-effective way." -President Barack Obama 11/25/2008

  14. #164
    Official Thread Jacker Senior Contributor gunnut's Avatar
    Join Date
    27 Jan 06
    Location
    DPRK, Demokratik People's Republik of Kalifornia
    Posts
    21,322
    Country: United States
    Quote Originally Posted by highsea View Post
    Are you referring to GPS sats or just in general?
    It does basically the same thing as GPS, but by a bigger committee, lol.
    GPS satellites. How many do we have up there and how many is the minimum needed for a system like that?
    "Only Nixon can go to China." -- Old Vulcan proverb.

  15. #165
    Ex-Wabber Defense Professional
    Join Date
    10 Dec 04
    Posts
    7,029
    Country: United States
    Quote Originally Posted by gunnut View Post
    GPS satellites. How many do we have up there and how many is the minimum needed for a system like that?
    There are 31 GPS sats in orbit, 29 are operational. The constellation calls for 24 sats in 6 orbital planes, with one spare in each plane.

    The design life is about 7.5 years, but we have one that is over twice that and still going, and about 8-9 that were launched in 1992-1993.

    You can check status here:

    ftp://tycho.usno.navy.mil/pub/gps/gpstd.txt

    Tha Gallileo system is also a 30 sat constellation, but with 9 sats ea. in 3 orbital planes and one spare per plane. Design life is 10-12 years. It is projected to become operational in 2010, a couple years behind schedule.
    Last edited by highsea; 27 Dec 06, at 21:40.
    "We will go through our federal budget – page by page, line by line – eliminating those programs we don’t need, and insisting that those we do operate in a sensible cost-effective way." -President Barack Obama 11/25/2008

+ Reply to Thread
Page 11 of 12 FirstFirst ... 2 3 4 5 6 7 8 9 10 11 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Similar Threads

  1. Favorite Naval Book(s)
    By Ytlas in forum Naval Warfare
    Replies: 80
    Last Post: 10 May 10,, 20:52
  2. World Naval Rankings
    By rickusn in forum Naval Warfare
    Replies: 82
    Last Post: 22 Jan 09,, 15:12
  3. Carrier Battle Group Essay
    By rickusn in forum Naval Warfare
    Replies: 56
    Last Post: 05 Sep 07,, 18:27
  4. An Interseting article....
    By rickusn in forum Naval Warfare
    Replies: 2
    Last Post: 10 May 05,, 12:59

Share this thread with friends:

Share this thread with friends:

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts