Titan Missile Museum: Butterfly Valve Lock Control (BVLC)
The butterfly valve lock control prevented an unauthorized or accidental launch of the missile. The BVLC used six thumbwheel selectors, each of which had 16 letters of the alphabet, creating nearly 17 million possible combinations. The BVLC code came in with the launch order, and unless the correct code was put in, the butterfly valve would not open and the missile could not be launched.
Видео Titan Missile Museum: Butterfly Valve Lock Control (BVLC) канала Titan Missile Museum
Видео Titan Missile Museum: Butterfly Valve Lock Control (BVLC) канала Titan Missile Museum
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