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S-1S Rudder Size?

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Premium Member
Jan 22, 2009
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I've noticed variation in the rudder size among S-1S models. Some have a more rounded shape, about the same size as the vertical fin. Others are significantly smaller and less rounded in shape.

Does anyone know the background and significance regarding performance differences, pros/cons, and whether thedesign isspecific to factoryvs. experimental models?


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