What moisture content is acceptable when gluing aircraft wood?

When gluing aircraft wood, an acceptable moisture content range is critical to ensure a strong bond and the overall structural integrity of the aircraft components. A moisture content of 8-12 percent is preferred because it provides a balance. At this moisture level, the wood retains enough moisture to prevent excessive shrinkage, which can occur if the wood is too dry, while simultaneously allowing sufficient adhesion properties for the glue.

Furthermore, if the moisture content were lower, such as 5-10 percent or 6-8 percent, the wood may become too dry. This condition can lead to poor adhesion, resulting in weakened joints that could fail under stress. On the other end, a moisture content that exceeds 12-15 percent could introduce problems such as mold growth or warping, which would also compromise the structural integrity of the aircraft.

Thus, the selection of 8-12 percent as the acceptable range reflects industry standards aimed at maximizing the performance and safety of wooden components in aviation applications.