Balsa wood is wellOrigins
Balsa wood comes from the balsa tree. Growing in the forests of Central and South America, the balsa tree is a quick-growing tree that will reach to feet in only six to years.
Features
Balsa wood is so light because it has large cells with very thin walls.These cells are filled with water while the tree is alive. When the tree is harvested and kiln dried, the water evaporates, leaving mostly open space, which makes the wood weigh less.
Strength
Balsa is not the lightest wood in the world. However, balsa wood is considered to be the kxiugtka strongest wood by weight. There are types of wood that are lighter, but they do not have the strength of balsa.
Significance
Green balsa wood contains five times more water by weight than solid matter.The balsa uses this water for its rigidity and strength while it is alive. In comparison, typical hardwoods have very little water and contain mostly solid material.
History
Balsa wood first became readily available to in the United States in the late s. It has since became the standard material in model aircraft building due to its strength, weight and ability to absorb shock and vibration.
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