No. 9r
... that the British rigid airship No. 9r, completed in 1916, featured an early example of thrust vectoring?
... that the British <a href="./Rigid_airship" id="mwEDc" rel="mw:WikiLink" title="Rigid airship">rigid airship</a> <b id="mwEDg"><a href="./No._9r" id="mwEDk" rel="mw:WikiLink" title="No. 9r">No. 9r</a></b>, completed in 1916, featured an early example of <a href="./Thrust_vectoring" id="mwEDo" rel="mw:WikiLink" title="Thrust vectoring">thrust vectoring</a>?