"Dale" wrote in message
...
In article ,
Carl Ellis wrote:

The wing root ventilation tubes on a 172 can cause a very strange noise
if
they are pulled most of the way out. I aborted a take off one time
because
of it. They noise was low frequency and oscillating, following the
throttle and acceleration of the airplane.


A real hard pushover will cause the vent tubes to "scream".

--
Dale L. Falk


So will your passengers ...

;O)

Jay Beckman
PP-ASEL
Chandler, AZ