Welcome to the Inert Ordnance Collectors.
  • Login:
Page 1 of 4 123 ... LastLast
Results 1 to 10 of 32
  1. #1
    Premium Member
    Join Date
    Jun 2007
    Location
    Holland
    Posts
    2,148
    Thanks
    612
    Thanked 3,217 Times in 652 Posts

    BLU-43/B or BLU-44 A/B "Dragontooth" minelet, USA

    Cutaway model of a US designed and manufactured BLU-43 B or BLU-44 A/B (Bomb Live Unit) “Dragontooth”, a cluster mine (also called minelet) as used extensively in the Vietnam war during operation “Igloo White” (1970) , a program to prevent infiltration of NVA and Vietcong personel into the southern part of Vietnam.
    The mine is a hydraulicly activated air dropped dispenser mine. Due to it’s shape –borrowed from nature’s earonautical design of a maple seed- it does not need a parachute, it will descend to the ground rotating on it’s wing, minimalizing the impact force.
    120 Dragontooth mines were packed in a CDU-2/B Cluster adepter, forty of which were loaded into a SUU-13/A dispenser (remains on plane, dispensing cluster adepters), meaning one dispenser holds 4800 mines to form the CBU (Cluster Bomb Unit) 28/A cluster munitions.

    Functioning of the mine:
    The mine exists of a plastic body, in which an aluminium fuze body with two radial slots is placed. A spring loaded piston with a sleeve is placed in the fuze body which is kept in upper postion by the arming piston retainer (1). The piston also acts as a sort of valve, keeping the liquid sensitizer fluid –Propylenediamine/Methanol- (B) apart from the main charge of 9 grams Nitromethane/ Nitroethane (A) by means of two O-rings. The spring loaded firing pin is kept in backward position by two balls which are kept in inward position by the release sleeve surrounding the firing pin housing (green). Connected to this sleeve is an aluminium cup in which the duplex detonator is placed. A spring keeps this assembly in it’s forward position. A rubber O-ring around the detonator and the inside of the piston sleeve prevents the fluid (B) from leaking away. A sterilizer capsule (C ) is placed in the mine body. This exists of an aluminium cup with a spring loaded sterilisation tablet, kept in place by a disolvable cover.

    After release from the CDU-2/B Cluster adepter, the arming tab is released (03), enabeling the arming piston retainer (01) to fall out. This enables the spring to move the piston with the sleeve downward, thereby enabeling the sensitizer fluid (B) to mix with the main charge fluid (A) to form the explosive mix. The fuze and the main charge now form one space filled with liquid. If pressure is applied to the mine body, the hydraulic pressure will push down the aluminium cup with the duplex detonator and the connnected release sleeve, riding it’s spring downward. This enables the two balls to move outward and release the firing pin, exploding the mine.
    The mixing of fluids A & B also enables the sensitizer fluid (A) to start to dissolve the dissolvable cover of the sterilisation tablet. If after activation of the mine it is not stepped upon after a certain time, the spring will push the sterilisation tablet (C ) through the weakened dissolvable cover, forming a chemical self- neutralisation system. However, this does not render inert the duplex detonator.

    The main difference between the BLU-43B and BLU-44B is in the chemical proces of neutralisation.
    The mine weighs 90 grams.
    The mine is activated if 7 kg of pressure is applied.
    The mine can be found in the colours olive drab, tan, brown, camouflaged or white. An inert Dummy model of the mine is also available.
    The transport safety (02) was removed only after the mine was loaded into the CDU-2/B Cluster adepter.

    The Sowjet union made a copy of this BLU mine, the PFM-1. However this mine is larger than the BLU-43B or BLU-44 A/B.

    Regards DJH
    Attached Images Attached Images
    Looking for / Suche noch:
    -8,8cm Pzgr.40.
    -8,8cm D (drahtsperre)

  2. #2
    ORDNANCE APPROVED/Premium Member
    Join Date
    Feb 2009
    Location
    Michigan - US
    Posts
    3,999
    Thanks
    303
    Thanked 4,029 Times in 1,164 Posts
    Nice work DJ.
    All dug or live ordnance shown in my posts is under EOD control and has been or will be dealt with accordingly by EOD personnel

  3. #3
    Premium Member
    Join Date
    Jun 2007
    Location
    Holland
    Posts
    2,148
    Thanks
    612
    Thanked 3,217 Times in 652 Posts
    Thanks US-subs. It is a very interesting design with the two seperated fluids, and the sterilizer capsule that only can work if the sensitizer fluid (B) is added when the mine is activated.
    Last edited by pzgr40; 8th March 2010 at 06:18 PM.
    Looking for / Suche noch:
    -8,8cm Pzgr.40.
    -8,8cm D (drahtsperre)

  4. #4
    Senior Member
    Join Date
    Nov 2007
    Location
    Ohio, US of A.
    Posts
    1,645
    Images
    9
    Thanks
    243
    Thanked 175 Times in 99 Posts
    Pzgr40,

    If I maybe so abrupt on two things.

    1) "Igloo White" is where the Air Force dropped seismic devices over over the jungle, especially on the Ho chin Mihn Trail. These ones were ment for trucks and tanks. In order to pick up some of the rumble of trucks, heavy machines, and Tanks. Some of these detectors were also. where also developed for listening to the enemy if he was walking down the Ho Chi Mihn Trail and were just lolygagging all the way.
    Now within the "Igloo White Program" I have some doubt about those devices were ever developed for that program. I could be wrong. But I have Been there, done that, and I'll never go there again, promise.

    2) Those dragon teeth were also used for a Recon Team that is running for its life. They were usually used behind the the RT if they had advanced more than 50 meters from the enemy. The Air Force would usualy drop them from side to side, perpendicular to where the enemy was and this would by them time in order to get a "Prarie Fire" extraction.

    Just my 2 cents worth.

  5. #5
    Premium Member
    Join Date
    Jun 2007
    Location
    Holland
    Posts
    2,148
    Thanks
    612
    Thanked 3,217 Times in 652 Posts
    Of cource you may, and I am shurely happy with any added info. The mine was called in conjunction with operation Igloo White on wikipedia in this piece of text:

    " The use of Dragontooth mines in Vietnam went largely unnoticed, likely as a product of its essentially classified usage primarily in Laos as part of Operation Iglo white. Production of the system had ceased by 1970, and it was predicted that existing stocks would be exhausted by the end of 1971."

    However, of cource I take your word as a first hand wittness for more true.

    About your second point; very interesting I did not know that. I only know the M86 PDM, the Persuit Discouragement Mine, in fact a ICM shell delivered ADAM mine fitted with a handgrenade fuze. However this M86 is of a later design.

    Thanks for the added info.
    Regards, DJH
    Last edited by pzgr40; 28th February 2010 at 11:15 PM.
    Looking for / Suche noch:
    -8,8cm Pzgr.40.
    -8,8cm D (drahtsperre)

  6. #6
    Senior Member
    Join Date
    Nov 2007
    Location
    Ohio, US of A.
    Posts
    1,645
    Images
    9
    Thanks
    243
    Thanked 175 Times in 99 Posts
    Check this out for I am thinking you are looking up the wrong item(s).

    [ame="http://en.wikipedia.org/wiki/Operation_Igloo_White"]Operation Igloo White - Wikipedia, the free encyclopedia@@AMEPARAM@@/wiki/File:Flag_of_the_United_States.svg" class="image"><img alt="Flag of the United States.svg" src="http://upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Flag_of_the_United_States.svg/22px-Flag_of_the_United_States.svg.png"@@AMEPARAM@@comm ons/thumb/a/a4/Flag_of_the_United_States.svg/22px-Flag_of_the_United_States.svg.png[/ame]

    Also, they do mention some of the air dropped ordnance, but I believe it was a very small portion of the program. About 90% was about the sensors.

    I guess we are both right.
    V40
    Last edited by V40; 1st March 2010 at 02:38 AM.

  7. #7
    ORDNANCE APPROVED/Premium Member
    Join Date
    Feb 2009
    Location
    Michigan - US
    Posts
    3,999
    Thanks
    303
    Thanked 4,029 Times in 1,164 Posts
    Quote Originally Posted by pzgr40 View Post

    The main difference between the BLU-43B and BLU-44B is in the chemical proces of neutralisation.
    The mine weighs 90 grams.
    The mine is activated if 7 kg of pressure is applied.
    The mine can be found in the colours olive drab, tan, brown, camouflaged or white. An inert Dummy model of the mine is also available.
    The transport safety (02) was removed only after the mine was loaded into the CDU-2/B Cluster adepter.

    The Sowjet union made a copy of this BLU mine, the PFM-1. However this mine is larger than the BLU-43B or BLU-44 A/B.

    Regards DJH


    Here are the three colors I know of, followed by the dummy and an East German/Soviet training copy. I've never seen one camouflaged or tan, nor heard of their existance before now. I'd be interested in seeing the reference source material.
    Attached Images Attached Images
    All dug or live ordnance shown in my posts is under EOD control and has been or will be dealt with accordingly by EOD personnel

  8. #8
    Premium Member
    Join Date
    Jun 2007
    Location
    Holland
    Posts
    2,148
    Thanks
    612
    Thanked 3,217 Times in 652 Posts
    Does anybody have info about the chemical composition of the sterilizer stick?
    Looking for / Suche noch:
    -8,8cm Pzgr.40.
    -8,8cm D (drahtsperre)

  9. #9
    Premium Member
    Join Date
    Jun 2007
    Location
    Holland
    Posts
    2,148
    Thanks
    612
    Thanked 3,217 Times in 652 Posts
    Hi, US-Subs, just look below the chapter design. I added white, as I had seen a white one before in another collection. For use in snow?
    Regards , DJH

    http://en.wikipedia.org/wiki/BLU-43_Dragontooth
    Last edited by pzgr40; 1st March 2010 at 06:47 PM.
    Looking for / Suche noch:
    -8,8cm Pzgr.40.
    -8,8cm D (drahtsperre)

  10. #10
    ORDNANCE APPROVED/Premium Member
    Join Date
    Feb 2009
    Location
    Michigan - US
    Posts
    3,999
    Thanks
    303
    Thanked 4,029 Times in 1,164 Posts
    post will be re-done
    All dug or live ordnance shown in my posts is under EOD control and has been or will be dealt with accordingly by EOD personnel

 

 
Page 1 of 4 123 ... LastLast

Bookmarks

Posting Permissions

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