Landing gear is a crucial part of an aircraft that allows it to take off and land safely. It typically consists of wheels or skids that support the plane's weight when it is on the ground. The landing gear is designed to absorb the impact during landing and provide stability while taxiing on runways. There are different types of landing gear, such as tricycle gear, which has two main wheels at the front and one at the back, and tailwheel gear, which has two main wheels at the front and a smaller wheel at the back. Each design has its advantages, depending on the type of aircraft and its intended use.