// payload
<[string8][object][rigidbody]
<[string8][Name][Passengers]>
<[float64][Mass][4000.0]>
assuming this means 4000 kg, divided by 80kg, makes a pax count of 50 ?
[-3.5 0.0 -0.5] obviously lets them sit one on top of each other in a near to CG-seat
the fuel however seems split up into diversified areas of the wing.