As the aircraft moves, air flows against its front and subsequently against the yaw string. The yaw string, then, sticks against the helicopter's windshield, either upright or at an angle.

Experience the operational readiness of Ukrainian Army Aviation as they prepare and launch missions in support of ground forces on the front lines.

From the perspective of the helicopter cockpit, the lights of the incoming American Airlines jet could have also been obscured by the glow of the city skyline, pilots said.

D.C. plane crash. A midair collision between an American Airlines plane and a U.S. Army Black Hawk helicopter near Reagan National Airport claimed the lives of 67 people, including about 20 young ...

Recording suggests incomplete radio transmission might have left Black Hawk helicopter crew without understanding of how it should shift position before crash.

On Jan. 29, an American Airlines passenger jet and an Army helicopter collided as the plane prepared to land at Washington D.C.’s Ronald Reagan National Airport.

A 3-D model created by The Times visualizes the helicopter pilots’ field of view minutes before a fatal crash with a jet in Washington. By Helmuth Rosales, K.K. Rebecca Lai, Mika Gröndahl and ...

The yaw string is a basic instrument with one end attached to the front of a helicopter or a glider, while the other end of the string is free to move according to the aircraft's motion.