In addition to what Dan said I want to emphasize the points of size and combat maneuverability. A 60 inch wingspan is a big airplane. My old pattern airplanes have about a 60 inch wingspan and they had a .60 gas engine in them and weighed (unfortunately) more than 5 pounds - closer to 7. The electric ducted twin jet in the video is a good looking airplane but note the flying style in the demo. Big open maneuvers while fast make the airplane into a target, not a fighter. Turn tight and the slow acceleration will make your airplane the object of the attention of everyone else flying.