<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31465639</termId><termName>vertical take-off and landing aircraft</termName><termType>PT</termType><termNote><![CDATA[ Fixed-wing aircraft capable of taking off and landing vertically and cruising at forward speeds comparable to conventional aircraft. ]]></termNote><termCreatedDate>2026-03-30 21:05:20</termCreatedDate><relation><relationType>UF</relationType><termId>31465640</termId><termName>VTOL aircraft</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31465641</termId><termName>VTOLs</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31465642</termId><termName>aircraft, VTOL</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31465643</termId><termName>aircraft, vertical take-off</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31465644</termId><termName>aircraft, vertical take-off and landing</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31465645</termId><termName>aircraft, vertical takeoff</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31465646</termId><termName>aircraft, vertical takeoff and landing</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31465647</termId><termName>vertical take-off aircraft</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31465648</termId><termName>vertical takeoff aircraft</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31465649</termId><termName>vertical takeoff and landing aircraft</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31449671</termId><termName>fixed-wing aircraft by wing design</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31476922</termId><termName>tilt-rotor aircraft</termName><termType>PT</termType></relation></term>  </Zthes>