<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31476922</termId><termName>tilt-rotor aircraft</termName><termType>PT</termType><termNote><![CDATA[ Vertical take-off and landing aircraft whose engine pods or rotors tilt 90 degrees from a horizontal position for horizontal flight to a downward position for vertical flight. ]]></termNote><termCreatedDate>2026-03-30 21:08:25</termCreatedDate><relation><relationType>UF</relationType><termId>31476925</termId><termName>rotor aircraft, tilt</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31476926</termId><termName>tilt rotor aircraft</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31476923</termId><termName>aircraft, tilt rotor</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31476924</termId><termName>aircraft, tilt-rotor</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31465639</termId><termName>vertical take-off and landing aircraft</termName><termType>PT</termType></relation></term>  </Zthes>