iÂ·deÂ·a. n. 1. Something, such as a thought or conception, that is the product of mental activity. 2. An opinion, conviction, or principle: has some strange political ideas. 3. A plan, purpose, or goal: She started school with the idea of becoming a doctor. 4.
The direction of the thrust is normally along the longitudinal axis of the rocket through the rocket center of gravity. But on some rockets, the exhaust nozzle and the thrust direction can be rotated, or gimbaled. The rocket can then be maneuvered by using the torque about the center of gravity. The magnitude of the thrust can be determined by the general thrust equation.
A Propeller âLiftsâ an Airplane Forward. Think of a propeller as a spinning wing. Like a wing, it produces lift, but in a forward directionâa force we refer to as thrust. Its rotary motion through the air creates a difference in air pressure between the front and back surfaces of its blades.