Final answer:
RAT deployment in aircraft systems uses the aircraft's kinetic energy to generate electrical power. It takes a few seconds for the RAT to fully deploy and start generating power.
Step-by-step explanation:
In aircraft systems, RAT stands for Ram Air Turbine. During RAT deployment, the source of power is the aircraft's kinetic energy, which is converted into electrical power.
The RAT is a small windmill-like device that is deployed from the aircraft and uses the airflow to generate power. This can be used to power essential systems such as flight controls, communication equipment, and lighting.
The duration of RAT deployment depends on a variety of factors such as the aircraft's speed and altitude. Generally, it takes a few seconds for the RAT to fully deploy and start generating electrical power. Once deployed, it can provide power for as long as necessary, as long as the aircraft maintains the required airspeed and altitude.
It is worth noting that RAT deployment is typically an emergency measure and is only used when the aircraft's primary power source, such as engines or APU, fails. In normal operations, the aircraft relies on its engines or APU for electrical power.