Boomerang
device · 21000 BC · Stone Age
A curved throwing weapon; the returning kind owes its flight to aerodynamics.
What it is made of
- Boomerang wings — has part. Two wings with an aerofoil profile.
- Boomerang elbow — has part. A bend between the blades.
Principles and materials it uses
- Lift — uses. The blades are wings that create lift.
- Angular momentum — uses. Gyroscopic precession brings the boomerang back.
- Wood — is made of. Boomerangs were carved from bent wood.
- Wooden plank — is made of. Wood.