Quiet, Tilt-Rotor Unmanned Aircraft Is Behind the Lines Spy Posted by Dror Caspi on October 4, 2010 at 10:00am Not a DIY but an interesting drone concept... As far as I can see, it can take off, hover and land as a tricopter, and also swing its two forward props 90 degrees to fly as an airplane.Aviation Week article on it is here. Read more…