REFLECTOR: Rudder flutter fix

TimRhod at aol.com TimRhod at aol.com
Thu Aug 3 12:29:49 CDT 2006


Duane suggested this:   Measure the distance from the middle of  the leading 
edge on the winglet just above the wing to the other leading edge  winglet. 
Then  measure from the trailing edge of one rudder to  the other trailing edge 
of the opposite rudder. The distance between the  trailing edge of the rudders 
needs to be at least one inch and not more than two  inches greater that the 
winglet leading edge measurement.  Mine was less  than a half inch. So because 
My ball is centered when I fly I need to shim out  each rudder equally un till 
I get at least one inch greater than the leading  edge measurement.  Both the 
top and the bottom of the rudder need support  stops when moving the rudder 
out.    An interesting observation  on my way home from Oshkosh. On a shallow 
decent I was doing about 205kts  indicated and once again I felt the slighest 
flutter  in the left rudder  When I looked out I could see the rudder 
fluttering  but only the top half  of the rudder was doing it.  I had shimmed out the 
bottom but not the top  and so I observed only the top vibrating.  Dwane had 
showed me at Oshkosh  how the factory on their new demonstrator had been shimmed 
out on the top and  bottom.  I am making these modifications and will report 
my findings when I  have them. It may be a while before I test fly as I am 
still a little freaked  out about going so fast. Every little bump I feel I think 
something is going  baaaad.  Pat I would appreciate knowing your 
measurements. You certainly  can go fast without flutter.  Thanks for making the trip to 
compete.  I enjoyed meeting you and talking.    Tim  Rhodenbaugh
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