Noise in icing

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salim
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Noise in icing

Post by salim »

Hello,

I have noticed that whenever I encounter (moderate) icing a sort of rumbling noise appear on my DA42 tdi and on another similar DA42.

I see no other abnormal indications beside the slight IAS loss due to the icing.

Any idea of the cause of the noise ?

Thank you !
Salim
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ememic99
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Re: Noise in icing

Post by ememic99 »

salim wrote:
Mon Mar 09, 2020 5:13 pm
Hello,

I have noticed that whenever I encounter (moderate) icing a sort of rumbling noise appear on my DA42 tdi and on another similar DA42.

I see no other abnormal indications beside the slight IAS loss due to the icing.

Any idea of the cause of the noise ?

Thank you !
Salim
Same here. I guess the pieces of ice just stuck in air inlet.
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neema
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Re: Noise in icing

Post by neema »

I've heard/felt it too. Occasionally, the cabin air inlet plugs up somewhere with ice creating suction/buffeting sound from the cabin vents. A few pats on the vent with the hand can open it up. Just be prepared to be shot with ice pellets when it unclogs. I have a video of it somewhere. I'll try to dig it up
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Roxi5m9
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Re: Noise in icing

Post by Roxi5m9 »

Same here! And I have a 2004 DA40. Twice I’ve had to descend through a layer of icing building up moderate clear icing on the leading edges and the prop, and both times the suction/buffeting sound occurred in the cabin. I assumed the icing buildup was occurring in the NACA air inlet under the wing.
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neema
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Re: Noise in icing

Post by neema »

Sorry for the dumb laughing, but you can see the flow of air switching back and forth with the towel held up in front of the vent.

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