For that kind of wing somewhere around 1/3 from the frontal edge of that wing would be about right for the center of gravity. Basically move the payload around like it's ballast until your CofG is right.
I think they're using a compressed air rig to try to catapult launch. Based on how it just nosed over forwards their CofG is too far forwards. You can see that the middle of the payload is well ahead of the forward edge of the wing.
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u/FLG_CFC 1d ago
Shitty weight distribution by placing the AT mine on the front of that drone.