Thrust Generation: To understand and apply the principles of physics, primarily Newton's Third Law of Motion (for every action there is an equal and opposite reaction), to accelerate a working fluid (like air, exhaust gas, or ions) in one direction to produce a reactive force (thrust) in the opposite direction.

Efficiency Optimization: To maximize propulsive efficiency and fuel efficiency (or specific impulse for rockets) by optimizing engine design and performance parameters. This ensures maximum distance or operational time with the least amount of fuel consumption.

Performance Analysis and Prediction: To use fluid dynamics, thermodynamics, and combustion chemistry to model, analyze, and predict the performance of different propulsion systems (e.g., turbojets, turbofans, rockets, electric propulsion) under various operating conditions like altitude, speed, and environment.