Flat Plate Airfoil

Let's take a look!

Watch the video on YouTube.

What kind of experiment is this?

Experimental procedure and explanation:

• Hold a thin, light plate at an angle and blow air on it.
• The air hits the plate and is deflected downward. This is because there is a force acting on the air from the plate.
  (The surface pressure will increase on the plate where the air is hitting, thereby creating a downward force on the air.)
• The plate applies a downward force on the flow and receives an upward force from the flow as a reaction force.
• The force perpendicular to the flow is called lift. Thus, lift does not always mean an upward force, but in this case, it does.

[Keywords]	Lift
[Related items]	The Principle behind Airfoil, Down Force
[Reference]	“The Wonders of Flow,” Japan Society of Mechanical Engineering, Kodansha Blue Backs pp. 156–161.