<?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">adjustable-pitch propellers</topic></authority><related type="broader"><topic>propellers</topic></related><variant type="other"><topic>adjustable-pitch propeller</topic></variant><variant type="other"><topic>variable pitch propellers</topic></variant> <note xml:lang="en"><![CDATA[ Pilot-adjustable propellers that may change blade pitch during flight. The blade angle can thus be adjusted to its optimum value for the phase of flight, be it takeoff, climb or cruise. ]]></note></mads>