What is one of the primary benefits of using Type IV fluid over Type I fluid?

One of the primary benefits of using Type IV fluid over Type I fluid is its longer duration of protection. Type IV de-icing fluid is designed to provide extended anti-icing capabilities, which means it can effectively prevent ice and snow buildup for a longer period compared to Type I fluid. This is particularly advantageous for aircraft that are on the ground for extended durations before takeoff, as it helps maintain the safety and performance of the aircraft during these times.

Type I fluid, while effective for de-icing, typically offers a shorter window of protection because it is thinner and has a lower viscosity, allowing it to run off more quickly once applied. In contrast, Type IV fluid has a higher viscosity, which enables it to adhere more effectively to surfaces, resulting in a longer-lasting protective layer against ice accumulation. This characteristic significantly enhances operational safety and efficiency, allowing for less frequent reapplication in cold weather conditions.