AAAR...? Like a Pirate? No, wait, that's Arrrgh.
These quadrotor configured flying robots have been making the BIM blog rounds for a while. Not sure why, I think we just have an innate love of "cool." I've been following them for awhile on YouTube. They are cool in and of themselves, but when you hear the back-story, more so.
Anyway, here's the scoop straight from the developers. Very worthy of your coffee break time.