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Weapons: Biggest Bunker Buster Ever Is In Production
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August 8, 2011: After nearly a decade of development, the U.S. Air Force has ordered eight MOP (massive ordnance penetrator) GBU-57A/B bunker buster bombs. These 14 ton weapons cost $3.5 million each. In the last few years, several B-2 bombers have been equipped to carry these weapons (two bombs per B-2). This was apparently meant to send a message to Iran and North Korea. There were no known targets for such a weapon in Iraq or Afghanistan, but there are plenty of such targets in Iran and North Korea. Moreover, even were there deep bunkers in Iraq or Afghanistan, you didn't need a stealth bomber to deliver a MOP. The enemy in those countries have no way of detecting a high flying B-52, much less a stealthy B-2.

But Iran and North Korea do have radars, and a B-2 could slip past those radars and take out the air defense system command bunkers, or any other targets buried deep. The 6.2 meter (20.5 foot) long MOP has a thick steel cap, and can penetrate up to 7.9-61 meters (26-200 feet) of concrete (depending on degree of hardness) or up to 61 meters of rocky earth, before exploding.

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bikebrains       8/8/2011 4:39:01 PM
In WWII the British dropped the six short ton "Tall Boy" and the eleven short ton "Grand Slam."  The Tirpitz was sunk with Tall Boys.    Does anyone know the story about a Tall Boy being on display at a military installation until someone mentioned that the bomb was filled with explosives?  
 
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pzkwmkv    B-2 payload   8/9/2011 9:59:01 PM
Is was just wondering how the B-2 was going to carry two 28,000 lbs when numerous we sites list the payload capacity at 40,00lbs? That is a big discrepancy between 40,000 and 56,000 lbs(2*28,000).
 
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LB       8/10/2011 6:06:51 PM
I wouldn't worry about it.  The empty weight of the B-2 is 158,000 lbs, it can carry 167,000 lbs of fuel, and it's max take off is listed at 376,000 lbs.  That produces the commonly cited number of the B-2's max load at 50,000 lbs.  If the weapon bays can handle a 28,000 lb weapon structurally there's no problem carrying two.  If the listed max take off isn't too conservative it can always take off with less fuel and top off in the air.
 
Remember that different loads require different carriage devices.  So while it's often listed the B-2 can carry 16 2,000 lb weapons the B83 is actually 2,400 lbs and then you have to add in the weight of each rotary launcher.  Another listed load is 80 500lb JDAM's which weigh 576 lbs ( 46,000 lbs) plus the two bomb racks.  Even NG lists the load at 40,000+.
 
Is was just wondering how the B-2 was going to carry two 28,000 lbs when numerous we sites list the payload capacity at 40,00lbs? That is a big discrepancy between 40,000 and 56,000 lbs(2*28,000).

 
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