"john smith" wrote:

In future I will be using carb heat as a matter of course when ambient
conditions are in the "severe" area of the chart. I definitely will not
be
waiting for symptoms in such cases.

Dan, I have a couple hundred hours behind the normally aspirated 0-470
Continental in C182's.
Anytime there is significant moisture in the air, the carb will ice up.

As I understand it, the carburetor arrangement on the TCM O-470 does not
provide for conduction of as much engine heat to the carburetor as the LYC
O-360s and O-540s, thus the O-470's notorious reputation for carb icing.

The trick is to constantly monitor the manifold pressure. As soon as you
see a one-inch drop, you apply carb heat. When the pressure comes back
up, turn the carb heat off. Repeat as necessary.

That's pretty much what my buddy Filipo told me about his 182. Carb ice is
a regular fact of life for him; it's a rare event for me (twice in six
years with this airplane).

--
Dan
C172RG at BFM