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V-1's nose and propeller.

Apparently, the V-1 when it was originally shipped lacked the nose, as it contained the buzz bomb's fuze, but another bomb was acquired and a new nose was fabricated.

Picture 1 of 2.

Part of the guidance system, the air stream would turn the propeller as the V-1 flew, operating a mechanism which counted the number of propeller rotations. Once the counter hit the number of rotations programmed by the launching crew—and therefore had flown the desired range—the auto-pilot would send the missile into a steep dive toward its target.