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Old June 15th 16, 02:05 AM posted to rec.aviation.soaring
Andreas Maurer
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Posts: 345
Default ASG-29 Coke Bottle Whistle

On Sun, 12 Jun 2016 15:37:46 +0100, RickH
wrote:


I hope some of you ASG-29 drivers have either experienced or heard of
this issue I'm having with my 2012 ASG-29. The ship has about 200 hours
on it. At about 100-110 knots I have a very loud and annoying sound
that comes from the rear of the ship. It sounds just like someone
blowing over a coke bottle to create a tone. I can get rid of the sound
by applying a little rudder although the yaw string is running true
while the sound is being generated. Rex Williams said he thought it was
the tail dump opening. I've put duct tape over the tail dump valve and
still have this annoying tone accelerating through 100-110 knots. John
Murray thought that it was the gap seal tape on the rudder. I would
have thought that would have produced more of a buzz sound but this is
probably my next step. Hopefully someone can enlighten me as to a
possible cause!



I just had this case with the 29 of a friend.
It turned out that the gap seal of the gear doors was loose. Replacing
it fixed the problem immediately.

Cheers
Andreas