I have a 3 blade Catto on my Long. One of the blades passes directly thru an exhaust stroke resulting in a blackened portion of the blade which must be cleaned regularly (No Problem). The question here is, does that blade passing thru the exhaust create an audible noise that can be heard even in flight?
Ever since I have installed it I have began hearing what sounds like an audible clicking sound.
Kilo42
Long Ez N81HM
