Mailing List lml@lancaironline.net Message #19090
From: Pat Cohenour <patricktc@cox.net>
Sender: Marvin Kaye <marv@lancaironline.net>
Subject: IV-P flap adjustment
Date: Mon, 09 Jun 2003 03:25:04 -0400
To: <lml>
Does anyone have any suggestions for the best method of adjusting the flaps on a IV?  We have the wings inverted on the cradles; the right flap as set at the factory travels freely throughout its motion with only a slight amount of friction in the fully extended position.  The left flap however  was binding significantly as it was set at the factory.  We have tried many different combinations of settings for the connecting rod and flap tie rod lengths and while improving on the factory adjustment, we have not been able to achieve the freedom of movement we see in the right flap.  With the left flap in the fully extended position, it takes a significant push to get it moving so it will "free-fall" to the full up position and only moves freely in the center of the range of motion.  (Or we can get no binding toward either end of the range, but not both).  I can see that the problem is, for example, the inboard tie rod will be too short at fully closed, but too long at fully extended, while the outboard will be just the opposite.  I am concerned that this may lead to excessive wear on the mechanism or possibly overloading the motor.
 
Maybe I'm too concerned about this, as perhaps the air loads in actual use will overpower any effect of the binding we are seeing.  Any thoughts or suggestions?
 
Pat Cohenour
IV-P
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