Boomerang

Jagadeesan P

20061241

B O OMERANG

ORIGIN

• Australian Aborigines

• the language of the Indigenous Australian Turuwal tribe

• Oldest - 30,000 years

LIFT

WEIGHT

FORCE

DRAG

FORCES ACTING ON BOOMERANG

• BERNOULLI’S PRINCIPLE (AIR FOIL)• COANDA EFFECT

LIFT GENERATION

AIR FOIL IN BOOMERANG

Right handed boomerang Left

handed boomerang

TYPES OF BOOMERANG

LAUNCHING POSITIONS

Gyroscopic effect

Why it comes back?

One of the wings produces more lift compared

to the other which creates a moment about an

axis perpendicular to the axis of rotation of the

boomerang thus creating the gyroscopic

precession.

Gyroscopic effect in boomerang

Thus with a simple physical phenomenon a toy with a great deal of surprising behavior and fun

is born

• Weltner, Klaus and Ingelman-Sundberg, Martin - Misinterpretations of Bernaulli’s Law; Physics of Flight

• Saulius Pakalnis - Aerodynamics of Boomerang

• www.researchsupporttechnologies.com• www.grc.nasa.gov

References:

QUESTIONS???