Further more scientific testing led them to find that there is a specific thrust to body-weight ratio that works best, with the direction of thrust about 25 degrees below horizontal. Through ...

Thrust Vector Control: A method used to control the direction of thrust produced by an engine, allowing for improved maneuverability. Nozzle Pressure Ratio (NPR): The ratio of the pressure at the ...

the thrust from the engine is 1500 N and the air resistance is 1000 N. The resultant force is 1500 – 1000 = 500 N and it is acting in the same direction as the car is moving (forwards).

The problem was traced to the actuators that change the direction of thrust on the Vega's upper-stage engine. When they received commands from the guidance, navigation and control (GNC ...