Flat spins意思

"Flat spins" is a term used in aviation to describe a dangerous aerodynamic condition that can occur in certain types of aircraft, particularly in older designs or in aircraft that are not properly maintained. A flat spin is a type of stall that is particularly difficult to recover from because the aircraft's nose is pointed straight down, and the wings are producing very little lift.

In a flat spin, the aircraft goes into a rapid descent while rotating around its vertical axis. The wings are stalled, meaning they are not producing enough lift to keep the aircraft flying, and the aircraft is tumbling in a stable, spinning motion. This can happen when an aircraft is flying at a low altitude and speed, and the pilot tries to recover by pulling up, which can cause the aircraft to stall and enter into a spin.

Recovering from a flat spin can be very difficult and requires precise control inputs from the pilot. The pilot must first recognize that the aircraft is in a flat spin and then perform a series of coordinated control movements to stop the spin and recover to level flight. This typically involves pushing the control stick forward to increase the airspeed and break the stall, then pulling back gently to recover altitude, while also using the rudder and ailerons to stop the spin and regain control.

Flat spins are a serious concern in aviation and are a major reason why stall recovery training is an essential part of pilot training. Modern aircraft are designed with safety features to prevent or mitigate the risk of flat spins, and pilots are trained to recognize the signs of a stall and to take immediate action to recover.