Issue while simulating a swarm of ArduPlane SITL instances using Mission Planner

Hello everyone,

I am currently working on simulating a swarm of fixed-wing aircraft in Mission Planner using SITL (Software-in-the-Loop). However, I have been facing multiple issues while setting up and operating the simulation. I have gone through the available documentation and discussions on ArduPilot Discourse but couldn’t find much information to resolve these problems.

I would really appreciate any guidance or suggestions to troubleshoot the following issues:

  1. Aircraft Moving Without Input: As soon as the aircrafts are selected, the aircraft begins moving on the map towards north on its own without any control input.
  2. Automatic Disarming: The aircrafts disarms automatically even after I successfully arm them in AUTO mode.
  3. Waypoint Following Issue: Despite configuring and setting up a leader-follower system, the aircraft do not follow the waypoints as expected.
  4. Swarm Behavior Issue: I attempted to simulate a swarm of planes. However, only one out of the three planes follows the path, and strangely, it is a follower plane, while the leader remains disarmed. The follower planes start following the mission only when I manually switch them to AUTO mode.
  5. Leader Plane in Auto Mode Issue: When I put the leader plane in AUTO mode to follow the mission, only one of the other planes starts the mission, while the remaining aircraft do not follow the same.

I would really appreciate any insights or suggestions on how to properly configure and run a swarm simulation in SITL. If anyone has successfully executed a similar setup, please share your experience or any resources that might help.

Thank you in advance!