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By definition, a fuel-injection system has fuel injectors for transporting fuel to the cylinders, not a carburetor. Therefore, carb ice cannot form in fuel injector systems. |
Fuel injector systems are subject to other operational considerations like vapor lock, which makes it hard to start the engine, especially on hot days. Adherence to the manufacturer's recommendations for operating this and other systems is important. |
Regarding carburetors, visible moisture is not necessary for carb ice to form. In fact, carb ice can form in outside air temperatures as high as 70°F if the parcel of air entering the carburetor has sufficient moisture. The air is forced through the carb's venturi (a narrowing of the throat) and its pressure and temperature drop resulting in condensation of the moisture on the inside of the carb where it can freeze, clogging the venturi and choking off the fuel flow. See the POH of the aircraft you are flying for procedures to follow in dealing with carb ice. |
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