The aniumation may work better in Internet Explorer as the motion is supposed to repeat. If you want to see it move and it is stopped, reload the page or click on the image itself to see the animation by itself.
The magenta lines represent the declination slow motion control driven by a 60 rpm motor (reversible) that drives a 1/2 inch shaft that feeds into the end of a tube where a nut is fixed to the end of the tube. The changing length of the slow motion is compensated for by sibstituting varying lenghts of tubes.
Cmdr. Silva used a similar mechanism as can be inferred from the drawing on the 737 Project main page. The mechanism is under construction in Mar. 2002.
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