This just recently came out of University of Dayton. Shows damage from a simulated drone strike by a DJI Phantom 2 at 238MPH. Seems they are trying to illustrate the dangers of recreational drones on manned aircraft. In this case a smaller fixed wing aircraft. When FOD hits an airfoil at a pretty good click I don't think it would really surprise anyone what the rate of damage could possibly be. But, the video is still pretty interesting to see.
www.cnbc.com

Watch what happens when a small drone hits a plane at 238 miles per hour
The University of Dayton Research Institute has put out a new video that shows the serious danger drone strikes can pose to aircraft. The test mimics a midair collision at 238 mph and shows a 2.1-pound drone ripping into the wing of a propeller plane.