Currently dont have a pixhawk board, but thought learning to plan a mission wont be that hard, installed mission planner, and now am trying to get a hang of things in this, ill have a servo attached to the AUX port of the pixhawk and ill plan it so the plane reaches X m/s amount of gps speed before dropping the payload and then before X-C m ill drop the payload so that the landing of the payload is as precise as possible here C is the drag coefficient, ill also have to take into account the paracute ill be making out of old plastic bags and how much they will reduce the speed.