I have been flying my -9A for 6 years now, and I have enjoyed it for 300 flight hours.
Since the first flight, people on the ground have remarked about a whistling sound from the aircraft when I fly by. I have wondered about he origin of this aerodynamic sound but not really digged too much into it, since you could'nt here it in the plane.
But lately this sound can be heard inside the aircraft, even with my Lightspeed ANR headset on.
A hight pitched tone, which gets higher with more speed, not related to engine RPM or alternator speed. From what I understand it is aerodynamic, possibly coming from an air leak in the tip-up canopy or somewhere else.
I have a thin foam list sealing the canopy to the airframe, which has been a little worn over the years, could a small air leak here produce such an annoying sound?
Or should I start looking somewhere else?
Anybody else out there with similar problems and a solution?
Best regards
Thomas Boyner
Since the first flight, people on the ground have remarked about a whistling sound from the aircraft when I fly by. I have wondered about he origin of this aerodynamic sound but not really digged too much into it, since you could'nt here it in the plane.
But lately this sound can be heard inside the aircraft, even with my Lightspeed ANR headset on.
A hight pitched tone, which gets higher with more speed, not related to engine RPM or alternator speed. From what I understand it is aerodynamic, possibly coming from an air leak in the tip-up canopy or somewhere else.
I have a thin foam list sealing the canopy to the airframe, which has been a little worn over the years, could a small air leak here produce such an annoying sound?
Or should I start looking somewhere else?
Anybody else out there with similar problems and a solution?
Best regards
Thomas Boyner