Interesting prototype drone from the partnership company between Sony and Japanese robotics firm ZMP, Aerosense. It looks like counter-rotating blades on a transverse axle that can transform between rear-facing and vertical modes for level flight and takeoff/landing. A couple aerodynamic things it would be interesting to know more about: In vertical mode, it looks like the body provides half a duct for the fan but possibly not for both propellers and definitely not on the back side of the drone.
Infrared video is starting to come to the masses with devices like the FLIR camera but this is a completely different level. I love the way the tarmac heats up behind the engines! That’s one of those details you never think about because you (obviously) can’t see in IR. (the takeoff starts at 5:00 in the above video, embedding doesn’t want to take my start time parameter today) You can pretty clearly see normal striations in the skin of the jet.
Among some of the weirder modifications done to Gulfstream planes were the changes for Shuttle Training Aircraft, a G-II that was used to simulate landings before astronauts jumped into the Shuttle itself. Shuttle approaches were so steep — 20 degrees! — that the jets had to be operated with the main landing gear down and both Spey engines running in reverse at 92% N2. N2 is a measure of the rotational speed of the high-compression stage of the engine, so 92% reverse N2 is almost full throttle in the opposite direction!