Rightly called a robot bomb during WWII, the V2 rocket was the world's first fully cybernetic weapon - a war robot. And nothing illustrates the V2 robot's automated character better than the A72 launch switch. It's a small, almost invisible, part of the missile, but as our video shows, it leads us into the deepest secrets of the V2's function.

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00:00 A look at the A72 , the true King of switches
01:00 Where to find the A72 on the missile
04:20 Adding the mounting plate
04:47 The exact location using old parts
05:50 Finding the A72 on museum V2 rockets
08:27 Looking at the spring actuator design
10:43 Where to find it on drawings
13:11 What the A72 does
18:59 The importance of electromagnetic relays
24:06 The domino analogy
24:36 Model demonstrating what it does and how relays are used on the missile
35:00 The V2 robot wakes up
36:50 Back to the real thing
38:02 The click you never hear
39:04 Thanks for watching

Our thanks to www.v2rocket.com and Ed Straten for additional photography.

Visit www.v2rocket.com for more information about the V2 missile.

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Presented by Robert J Dalby

Produced by DB Video Services for Astronomy and Nature TV

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