👉 "Underthrust" is a technical term in aerospace engineering that refers to the force of gravity acting upon an object or system. It's used in flight control systems and propulsion mechanisms, such as engines or propellers, which are responsible for pushing objects into the air or lifting them. In simple terms, "underthrust" means that something is being pushed upward by gravity, causing it to accelerate. This acceleration can be felt by the object itself, or by other observers on the ground who
