1. Aerodynamics for Dummies
Basic Laws Of
Aerodynamics Or
Introduction
Title Page
Aerodynamics for Dummies

2. Newton’s Laws of Motion
Law of Inertia
Law of Acceleration
Law of Action and Reaction

3. Law of Inertia Newton’s First Law:
This law states that a body at rest will remain at rest, and a body in motion will remain in motion until acted upon by an outside force.

4. Practical example of the Law of Inertia
Rotor system prior to start (remains at rest)
Engine overcomes resistance to movement (outside force)
Rotor continues to spin after shutdown (remains in motion)
Rotor slows due to air resistance (Drag or outside force)

5. Law of Acceleration Newton’s Second Law:
The force required to produce a change in the motion of a body is directly proportional to its mass and the rate of change in its velocity.
Acceleration is a change in velocity with respect to time. It can be either an increase or decrease in velocity

6. Acceleration = Force over Mass
The force required to move an A-Star
across the ramp to some speed is greater than the force required to move an R-22 OR
If we applied the same force used to
move the A-Star on the R-22, the R-22 would move faster, or accelerate.

7. Law of Action and Reaction
Newton’s Third Law:
For every action, there is an equal and opposite reaction
If an interaction occurs between two bodies, equal forces in opposite directions will be imparted to each body

8. Torque Effect is an example of
“Action - Reaction” or
Another example is
The Recoil from a Gun…

9. Question
Why does the projectile move and
the barrel remain in place?

10. Because the barrel has more mass
Answer:
Because the barrel has more mass

11. Questions?
Go home
ball!