Which type of de-icing system uses inflatable boots?

The correct choice refers to a type of de-icing system that employs inflatable boots, commonly known as "boots." This system consists of flexible rubber envelopes or boots fitted along the leading edges of the wings and tail surfaces of the aircraft. When ice accumulates on the leading edges, these boots can be inflated, which causes the ice to break away from the surface due to the expansion of the rubber. This method is effective for removing ice and maintaining optimum aerodynamic properties, enhancing safety during flight in icy conditions.

The inflatable boot system is particularly preferred in smaller aircraft, where weight and Power requirements for de-icing systems can be critical. It is designed to be activated by the pilot and is typically used in conjunction with other ice prevention methods as part of a comprehensive ice control approach.