flickroll
Well Known Member
When I first flew my RV-8, I experienced a noise that at first scared the h*** out of me because I thought it might be control flutter. It was a high pitched buzz, but after some diagnostics I realized the noise was not coming from the controls, but rather from the rear canopy skirt vibrating against the fuselage. If the pilot (or passenger) air vents were turned off, no buzz, wide open, I get a buzz. My first remedy was to attach fuzzy velcro on the inside of the canopy skirt to stop the noise from the vibration, and it mostly works, although I occasionally still get the buzz, particularly when down low and fast.
But the buzz is really caused by more air entering the cabin than can easily exit the cabin. So the air exits the cabin around the skirt, causing it to buzz as the air squirts outside. So the real remedy is to provide for at least as much exit air volume as the volume entering.
Has anyone addressed this? If so, what sort of exit vents did you provide? I'm thinking about creating exit holes in the rear baggage compartment which will allow air to enter the aft fuselage and then out completely in the empennage area. I think there may be enough 'leakage paths' from the cabin to the rear baggage compartment to channel that air, and then I just need a way for it to exit the baggage compartment. Any thoughts or tips?
Thanks
But the buzz is really caused by more air entering the cabin than can easily exit the cabin. So the air exits the cabin around the skirt, causing it to buzz as the air squirts outside. So the real remedy is to provide for at least as much exit air volume as the volume entering.
Has anyone addressed this? If so, what sort of exit vents did you provide? I'm thinking about creating exit holes in the rear baggage compartment which will allow air to enter the aft fuselage and then out completely in the empennage area. I think there may be enough 'leakage paths' from the cabin to the rear baggage compartment to channel that air, and then I just need a way for it to exit the baggage compartment. Any thoughts or tips?
Thanks