{
  "reviewed": "2026-09-23",
  "status": "document-reviewed-not-runtime-tested",
  "sources": [
    {
      "id": "cg",
      "title": "NASA Glenn Research Center. Center of Gravity",
      "url": "https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/center-of-gravity/"
    },
    {
      "id": "load",
      "title": "ArduPilot. Adding Simulated Peripherals: Slung Payload / Winch",
      "url": "https://ardupilot.org/dev/docs/adding_simulated_devices.html"
    },
    {
      "id": "gazebo",
      "title": "ArduPilot. ardupilot_gazebo: plugin and installation guide",
      "url": "https://github.com/ArduPilot/ardupilot_gazebo"
    },
    {
      "id": "studio",
      "title": "Skybrush. Studio: features and service limitations",
      "url": "https://skybrush.io/modules/studio/"
    },
    {
      "id": "addon",
      "title": "Skybrush. Studio for Blender: source and license",
      "url": "https://github.com/skybrush-io/studio-blender"
    },
    {
      "id": "server",
      "title": "Skybrush. Server: fleet communication and management",
      "url": "https://github.com/skybrush-io/skybrush-server"
    },
    {
      "id": "crazy",
      "title": "IMRCLab. Crazyswarm2: ROS 2 stack for Crazyflie",
      "url": "https://github.com/IMRCLab/crazyswarm2"
    },
    {
      "id": "sim",
      "title": "IMRCLab. Crazyswarm2 Usage: Simulation",
      "url": "https://imrclab.github.io/crazyswarm2/usage.html#simulation"
    },
    {
      "id": "downwash",
      "title": "Preiss, J. A., Hönig, W., Ayanian, N., & Sukhatme, G. S. (2017). Downwash-Aware Trajectory Planning for Large Quadrotor Teams",
      "url": "https://arxiv.org/abs/1704.04852"
    },
    {
      "id": "bullet",
      "title": "Learning Systems Lab. gym-pybullet-drones",
      "url": "https://github.com/learnsyslab/gym-pybullet-drones"
    },
    {
      "id": "fsc",
      "title": "FSC Lab / Longhao Qian. px4_command: tethered payload flight control",
      "url": "https://github.com/LonghaoQian/px4_command"
    }
  ]
}