Which characteristic is typical for rotary-wing aircraft?

Rotary-wing aircraft, commonly known as helicopters, are specifically designed to achieve a unique airborne capability that distinguishes them from fixed-wing aircraft. One of the defining characteristics of rotary-wing aircraft is their ability to hover in place. This is made possible by the rotating blades that generate lift and allow the aircraft to remain stationary above a particular point on the ground.

The ability to hover provides a significant operational advantage, allowing rotary-wing aircraft to take off and land in confined spaces, conduct search and rescue missions, perform aerial surveillance, and access areas that may be inaccessible to fixed-wing aircraft. This flexibility enhances their utility in various applications, including military operations, medical evacuations, and support for other aerial activities.

In contrast, the other choices highlight characteristics that are not typical of rotary-wing aircraft. For instance, rotary-wing aircraft do not require a runway for takeoff, which is a requirement for fixed-wing aircraft. Furthermore, while fuel efficiency can vary among different types of aircraft, the hovering capability often comes at the cost of higher fuel consumption compared to many fixed-wing designs. Lastly, the fixed wings are a defining feature of conventional airplanes, not rotary-wing aircraft.