Which method is effective in preventing icing of fuel lines?

Implementing anti-icing additives is an effective method to prevent the icing of fuel lines in aircraft. These additives are specifically formulated to lower the freezing point of water that may be present in the fuel system. When flying in cold and potentially humid conditions, water can accumulate in the fuel tanks and lines. If this water begins to freeze, it can block fuel flow, which is critical for maintaining engine performance and safety.

Anti-icing additives work by mixing with the water to prevent it from solidifying, ensuring that it remains in a liquid state even at lower temperatures. This helps to ensure uninterrupted fuel flow and reduces the risk of ice formation that could disrupt engine operations.

Other methods, such as using antifreeze chemicals, might also be relevant in certain conditions, but anti-icing additives are specifically designed for use in aviation fuel. Low-altitude flying may not be practical as a long-term solution, as icing can occur at various altitudes depending on atmospheric conditions. Increasing fuel pressure does not address the direct issue of water freezing in the lines, making it less effective for preventing icing.