PI 32

Today the Measurement Committee issued Public Interpretation No. 32 concerning deflection of fixed appendages, which is in follow-up to PI 22. No doubt our dear readers of a more technical bent will find this one interesting. An excerpt:

In a “fixed” appendage that has its primary structure deforming under lift and drag forces, the use of secondary structure that only comes into play after a certain amount of deflection has occurred in the primary structure and then limits the amount of deflection would not be deemed to be “controlling” the deflections, provided none of the structure is actively controlled in any way.