Lifting a Huge Balloon with Air

Let's take a look!

Watch the video on YouTube.

What kind of experiment is this?

Experimental procedure and explanation:

• Let us try to lift a large balloon (90-cm diameter) using a blower. You can follow the same procedure as “A Balloon that Floats at an Angle.”
• First, lift the balloon vertically. At this time, the balloon is floating due to aerodynamic drag.
• Then, start tilting the blower. Even though the air is blown at an angle, the balloon remains levitated.
• Lift created by air flowing around the balloon, air resistance (drag), and the gravitational force are all in equilibrium.

[Keywords]	Coanda effect, momentum theory
[Related items]	A Balloon that Floats at an Angle
[Reference]	“The Wonders of Flow,” Japan Society of Mechanical Engineering, Koudansha Blue Backs, pp. 128-133