<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">variable-sweep aircraft</topic></authority><related type="broader"><topic>fixed-wing aircraft by wing design</topic></related><variant type="other"><topic>aircraft, swing-wing</topic></variant><variant type="other"><topic>aircraft, variable geometry</topic></variant><variant type="other"><topic>aircraft, variable-sweep</topic></variant><variant type="other"><topic>swing-wing aircraft</topic></variant><variant type="other"><topic>variable geometry aircraft</topic></variant> <note xml:lang="en"><![CDATA[ Aircraft whose wings are so designed that they can be moved backward or forward in flight to optimize aerodynamic performance at widely differing speeds. ]]></note></mads>