Blast doors

For general discussion with your fellow Minuteman III crewdogs, maintainers and cops. Currently based at Minot AFB, ND, Malmstrom AFB, MT, and F. E. Warren AFB, WY. Formerly based at Grand Forks AFB, ND. Operational from 17 Apr 1970 to present. Share your stories and meet up with an old friend.

Blast doors

Postby silo warrior on Sat Nov 19, 2011 7:01 pm

I have a question about the blast doors at the Minuteman LCCs. Bieng a Titan II guy the closest I ever got to a Minuteman LCC was walking past the trainers at Vandenberg. Here is my question in Titan II we had three blast doors you had to go through to gain acess to the LCC. No two doors could be open at the same time this kept the site from ever becoming soft. I have seen pictures of the big blast door at the Minuteman LCCs but are there two doors so that the complex is never soft? Just wondering how you gain acess and still keep the complex in a hardened state.

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Re: Blast doors

Postby Capt. Bill on Sat Nov 19, 2011 7:42 pm

This applies to the Boeing LCF with a downstairs LCEB (support building) that should be Minot, Whiteman and Warren.

There is a 25 ton blast door between the elevator shaft and the LCEB and LCC. The LCC has it's own 10 ton blast door. I believe both of those doors are not supposed to be open at the same time.

The elevator shaft door can be opened from either side. The LCC blast door can only be opened from inside the LCC.

Both doors have pins that extend into the wall. The elevator shaft door pins are operated by a hand wheel and the LCC blast door pins are pumped out hydraulically.
MM I, DMCCC 741st, 742nd SMS Oct 69 - Oct 71 3 HQs and a Select Crew rating
MM III DMCCC, 742nd SMS Oct 71 - Feb 72
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Re: Blast doors

Postby Capt. Bill on Sat Nov 19, 2011 8:05 pm

In the LCC we had an indicator light that showed the elevator shaft blast door was closed and locked. Pretty sure that when the relief crew came down we waited until that light went out and came back on to open the LCC blast door. So we would have the door open while the relief crew as doing their LCEB inspection.

If someone was having Standboard check in the LCEB we would not open the LCC door until they finished. Not sure how we communicated with someone in the junction though.
MM I, DMCCC 741st, 742nd SMS Oct 69 - Oct 71 3 HQs and a Select Crew rating
MM III DMCCC, 742nd SMS Oct 71 - Feb 72
MM III MCCC, 742nd SMS Feb 72 - Aug 72
GT 07,08,09GM - Nov 1971 (key turned all three)
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Re: Blast doors

Postby TerrorOfTucson on Mon Nov 21, 2011 6:14 am

See pix of Whiteman's O-1 (Boeing built) here: http://news.webshots.com/album/572884993VFIOee

Virtual Tour of MM (Deuce--Sylvania built) LCC: http://www.captainswoop.com/icbm/mslpull3d.html

Warren, current, with pix and drawings: http://cryptome.org/eyeball/n1/n1-eyeball.htm

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Re: Blast doors

Postby TJer99 on Thu Dec 01, 2011 2:08 am

There is really only one blast door to the LCC that is hardened. I assume by "soft" you mean susceptible to EMP. In the MMIII we were soft whenever the blast door was open and so only supposed to open for access and minimize having it open. We accepted the risk of being soft for several times for crew change and getting food, etc.
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Re: Blast doors

Postby Capt. Bill on Thu Dec 01, 2011 4:25 am

TJer99 wrote:There is really only one blast door to the LCC that is hardened. I assume by "soft" you mean susceptible to EMP. In the MMIII we were soft whenever the blast door was open and so only supposed to open for access and minimize having it open. We accepted the risk of being soft for several times for crew change and getting food, etc.


You still had the elevator blast door and the blast valves.
MM I, DMCCC 741st, 742nd SMS Oct 69 - Oct 71 3 HQs and a Select Crew rating
MM III DMCCC, 742nd SMS Oct 71 - Feb 72
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GT 07,08,09GM - Nov 1971 (key turned all three)
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Re: Blast doors

Postby nasa1974 on Fri Dec 02, 2011 8:01 pm

Bad Sam, Thanks for the pictures. Brings back some memories. N-1 sure has changed since I was in it.
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