ELI5: Explain Like I'm 5

Cooper-Harper rating scale

The Cooper-Harper rating scale is like a report card for airplane pilots. Just like a teacher gives grades to kids, the Cooper-Harper scale gives grades to pilots to show how well they did during a flight.

The scale looks at five different things that pilots need to do well during a flight:

1. Aileron control - this is about how well the pilot controls the airplane in the air, especially when turning or banking.
2. Rudder control - this is about how well the pilot uses the rudder to steer the airplane on the ground, especially when taxiing.
3. Elevator control - this is about how well the pilot controls the airplane's up-and-down motion.
4. Braking control - This is all about how well the pilot controls the airplane when it's on the ground and needs to slow down or stop.
5. Coordination - this is about how well the pilot manages all of these different aspects of flying together, so that the flight is smooth and safe.

Each of these five things is given a score from 1 to 10, with 1 being the worst and 10 being the best. When you add up all five scores, you get a total score for the flight, which is the pilot's overall grade.

Just like with a report card, a low score on the Cooper-Harper scale means there are things the pilot needs to work on to become a better and safer flyer. A high score means they're doing a great job! Overall, the Cooper-Harper rating scale helps keep everyone safe by making sure pilots are trained to fly as safely and smoothly as possible.