Online Ground School (Private Pilot)
Lesson: Basic Aerodynamics
There are, four force’s that act on an aircraft during straight-and-level and un-accelerated flight.
Thrust –is the forward force from the powerplant and is opposite of drag.
Drag – is the rearward force caused by disrupted airflow from the wings, fuselage, etc. and is opposite of thrust.
Weight – is the downward force caused by gravity and additional items such as fuel, cargo, crew, etc. and is opposite of lift.
Lift – is the upward force created by the airflow around the wings, and is opposite of weight.