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The Lockheed Martin RQ-170 Sentinel is an American unmanned aerial vehicle (UAV) developed by Lockheed Martin and operated by the United States Air Force for the Central Intelligence Agency (CIA). It's curious to note that its aerodynamic profile resembles that of a peregrine falcon. There's not much information about this aircraft, but it's estimated that it can reach a speed of 950 km/h and 1400 km of autonomy. Which's the secret to reach a high velocity is the project goal. The drag coefficient is a good reason for this. In this project, we can calculate the drag coefficient using an Incompressible Flow solver.

variation of lift with changing location of 2nd flap

Aerofoil in a different number of angle of attacks then measuring the drag coefficient of that wing.

Aerodynamik simulation of a F1 style rearwing

wing | SimScale Project Library | Page 3