http://www.apple.com/shop/product/HJWF2LL/A/dji-phantom-4-camera-drone?afid=p238|sQLxNT7Ag-dc_mtid_1870765e38482_pcrid_80492267170_&cid=aos-us-kwg-pla-btb-slid- This one which looks a lot like the one in the article can go 45 miles an hour. That combined with a good wind gust around buildings can get it going to 90 MPH easy if it’s out of control (it doesn’t take much altitude to get big gusts).
From there it all depends on how the drone hit. If it broadsided the window it would just bounce off, but if it got blown into it in a gust, which happens a lot around large buildings, it could easily hit at a point on it (namely any of the legs) and that’d easily break the window if it’s going at a good clip.
Yeah, this is totally plausible, to be honest. It doesn’t take much to break a window if you concentrate that much force on one point, and drones sure as hell can go quite fast.
