Aurora LightningStrike aircraft, an unmanned, hybrid propulsion aircraft capable of vertical take-off and landing, along with XV-24A Vertical-Lift Platform are currently in progress under DARPA VTOL X-Plane Program
<a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=nxuih5NMUkI">U.S. Army Research Laboratory</a>
2017-08-21
<a rel="nofollow" class="external text" href="https://www.arl.army.mil/www/articles/3062/image.6.jpg">U.S. Army Research Laboratory Official Web-site</a>