In article ,
"Icebound" wrote:

"Dylan Smith" wrote in message
...
On 2005-08-21, Roy Smith wrote:
Carb ice isn't going to form in a few seconds.

It's even less likely to form if there's no fuel!


Oh?

Carb ice forms because the reduction of pressure in the intake, causes the
air to cool below freezing, and if moist enough, the moisture condenses and
freezes onto the butterfly.

If there is no fuel but the motor continues to be turned by the prop, does
not carb suction (reduction in pressure ) still exist to some extent?

The biggest heat sink in the carburetor by far is gasoline being vaporized.
The adiabatic cooling you're describing is an infinitesimal effect compared
to the heat of vaporization being sucked up by the gasoline.