Biodegradable binding material protects CV-22s during practice landings

After a year of trials, the 58th Special Operations Wing concluded that a biodegradable binding material applied to practice drop zones helps protect the engines and propellers of the CV-22 from damage by dirt.

[thumb]http://www.af.mil/News/ArticleDisplay/tabid/223/Article/564007/binding-material-to-save-osprey-engines.aspx[/thumb]