Coffin corner (aviation)

Okay, so imagine you are playing with a ball in your backyard. You throw the ball really high up in the air, and it goes really far. But then you see that the ball is going to land in a place where you don't want it to. Maybe there's a fence there, or a tree, or something else that would make it hard to get the ball back. So you try to quickly run over to that spot and catch the ball before it lands. This is kind of like what pilots have to do when they fly a plane.

Now, when a pilot is flying a plane, they have to make sure they stay at a certain altitude (which is how high the plane is from the ground). If they go too low, they might crash into the ground. But if they go too high, they might not have enough air to keep the plane going. So the pilot has to be really careful and stay within a certain range of altitudes.

This is where the "coffin corner" comes in. The coffin corner is a small range of altitudes that a pilot has to stay within, or else the plane might not be able to fly very well. It's called "coffin corner" because if the pilot goes too high or too low, it can be very dangerous for the plane, kind of like being stuck in a coffin.

So, the pilot has to pay close attention to things like the temperature, the air pressure, and the weight of the plane, because all of these things can affect the plane's ability to fly safely. If the plane is too heavy, or if it's too hot outside, or if the air pressure is too low, the pilot might have to adjust the altitude to stay within the coffin corner.

It's kind of like playing with a ball in your backyard, but instead of trying to catch the ball before it lands in a bad spot, the pilot has to make sure the plane stays flying safely within a certain range of altitudes.