Which property of wood must be carefully measured to avoid structural problems in aviation?

In aviation, moisture content is critical in ensuring the structural integrity and performance of wood. Wood is a hygroscopic material, meaning it can absorb and release moisture depending on the environmental conditions. When the moisture content is too high, wood can swell, leading to warping, cracking, or fungal growth, which compromises its strength and stability. Conversely, if the wood becomes too dry, it can also shrink and become brittle, making it susceptible to failure under stress.

For aviation applications, maintaining a specific moisture content within wood is essential because aircraft structures must withstand various forces and conditions during flight. The correct moisture level helps ensure the longevity and performance of wooden components, keeping them safe and reliable under different environmental conditions. Properly measuring and controlling moisture content not only prevents structural issues but also contributes to the overall safety and efficiency of the aircraft.