Four Forces on an Airplane by NASA Glenn Research Center
= Four Forces on an Airplane by NASA Glenn Research Center
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{tag=Work by NASA Glenn Research Center}
https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/four-forces-on-an-airplane/
Sections Weight, Lift, Drag and Thrust: force directions and distinctions between aerodynamic and propulsive forces.