Carb Heat in Rain?

2 weeks 1 day ago #3707 by STEVE ELLS
Replied by STEVE ELLS on topic Carb Heat in Rain?
Hi John,
Its good information. Adding heat will lessen the potential of carburetor ice.
The POH doesn't specify what heavy rain means but adding partial carburetor heat during cruise power flight has been shown to better atomize the fuel/air mixture down stream of the carburetor throat.
One book by and experience C-182 pilot suggested that the addition of carb heat to get the carburetor heat to 50 deg F smoothed out his engine due to more even distribution of the fuel/air mixture to the individual cylinders.

Your engine operation will feel a little different when adding carb heat because it richens the mixture. Leaning should cause a return to smooth engine operation.

Let me know what you find.


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2 weeks 5 days ago #3703 by John Zarpak
Carb Heat in Rain? was created by John Zarpak
I found the following in C172 POH. Should I do it or this is yet another Wrong information?

The use of full carburetor heat is recommended during flight in heavy
rain to avoid the possibility of engine stoppage due to excessive water
ingestion or carburetor ice. The mixture setting should be readjusted for
smoothest operation. Power changes should be made cautiously, followed
by prompt adjustment of the mixture for smoothest operation.
The following user(s) said Thank You: Jen D

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