title_body: What counts towards the official weight of a drone? In the United States, a drone that weighs 55 pounds or more needs to be registered using a different process than lighter drones.  What counts towards that weight -- is it dry weight, fueled weight, maximum takeoff weight, or something else entirely?
upvoted_answer: Unmanned aircraft weighing less than 55 pounds and more than 0.55 pounds (250 grams) on takeoff, including everything that is on board or otherwise attached to the aircraft and operated outdoors in the national airspace system must register.
  
  Federal Drone Registration: FAQ (Updated February 02, 2020)