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Old 06-10-2013, 08:54 PM   #133 (permalink)
freebeard
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I was thinking an articulated wiper arm off a city bus or something (at the stagnation point). I never worked out how to have the smoke nozzle travel along the arm, but a simple start-stop control would be enough to get one one's half-body of revolution.

Heh, just have three or four nozzles spaced along the arm.
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