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Old 07-18-2002, 05:59 AM
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AndySteere
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Default Dual-servo elevator linkage geometry

What is the best way to setup dual-servo elevator halves? Here's the deal... I'm getting ready to start on a P.A.M. Gee Bee Y and the manual suggests setting up the servos and linkages in a way that looks like it will cause differential movement between the two elevator halves. Take a look at this pic, from the manual, on how they recommend you set it up:



On the left side, they have you use the bottom of the two servo-openings for the elevator servo, and put the servo-arm on top. On the right side, they have you use the top servo-opening and put the servo-arm on the bottom. Note the difference in the angle of the pushrods in relation to the stab.

Is this a good setup? They indicate this method doesn't require a reversing servo. Would it be better to go ahead and set the two elevator servos exactly the same (both in the top slots with the horns facing down) and put a reversing-Y on one of the servos?

Thanks in advance!