Bloody Hell Jezza where did you find that , I do have a much larger copter can carry a 6kg camera never thought of putting a machine gun on it.
Lordrumpunc I have seen that video (pretty cool) and it just comes down to practice. I can launch mine from a moving boat and that’s the aim to follow boats and surfers at speed. Trust me it's bloody hard to get it to take off & calibrate from a moving vessel and then land again. The video below is one I did of my boat for an Ad in boatpoint it shows me controlling the copter from a high speed boat.
Rosobot yes it is the H20 , it can take a gimbal but you can't protect the control board on the gimbal if it gets wet but the rest of the gimbal would be fine. Gimbal is not always the go if you look at my video I changed the camera angle by powering up and down pretty simple way of doing it and the ESC's are vented through the side of the body with cool fins and sealed with silicon..