what’s the use of the cart that pushes back the airplane? Can planes not reverse without it?

Question

what’s the use of the cart that pushes back the airplane? Can planes not reverse without it?

In: 188

Answer 1

Planes reverse by redirecting the air out of the back of the engine forwards — called a powerback. While most aircraft can do powerbacks, it is usually not allowed by company procedure since it blows debris on the ground up into the engines. Planes with tail mounted engines were more likely to powerback than planes with low wing mounted engines.

https://en.wikipedia.org/wiki/Powerback