Thanks for your excellent thoughts. I will keep my eyes open for more info
on this. Still can't remember if I put the counter weight in the rudder.
One thing for sure, if it is there, I am not going to bother trying to get
it out.
Best Regards
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
klehman@albedo.net
Sent: Tuesday, March 06, 2001 12:03 PM
To: murphy-rebel@dcsol.com
Subject: Re: Rudder tip
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Hi Brian
I believe the flex (and twist) properties of the structure that a
control surface is attached to is a very important part of flutter. It
is possible that the attachment method of the vertical fin vs. the stab
is sufficiently different that an added weight is not needed in the
rudder. Happily there are enough Rebels flying to confirm that the
weight is not needed on a stock rudder.
Similar situation with ailerons. Some ailerons need a mass balance
because of wing flex properties but the stock fabric covered Rebel
aileron doesn't at normal speeds. Change the construction method of the
wing though and troubles could arise.
There are other factors as well but I think that is the most likely
explanation.
Ken
ps - as an unrelated tidbit that has nothing to do with a Rebel - I have
even read of situations where the aileron became a trim tab for the
wing. ie up aileron twisted the wing enough to make the wing go up. Bad
day!
that the rudder would needHi There
The weights are definitely there to reduce flutter. I am reasonably sure
one as well as the elevators as the design in similar.
Comments?
Brian #328R
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