Did You Know?

Hot air balloons hold hot air created by a heat source known as a burner. The burner creates an open flame by burning a mix of liquid propane and air. Hot air balloons are buoyant because the hot air inside the envelope has a lower density than the colder air outside.

More Ideas on Vehicles

Boat 3
Sailing Boat 3
Spaceship 5
Green Hot Air Balloon
Crane 2
Sailing Boat 2
Mobile Crane