Ive was just building until i remembered there were elevators on the USS Beast, i wanted to make a mech use those elevators but i couldnt make them go down except for planes, and i thought mechs couldnt use them because they dont have Landing Gears and Wings like my Stingray, but i tried putting those parts and it still didnt work, what are the requirements for the elevators to work?

Also to those wondering if im still making the remake, yes im still doing it my curiosity took over me and i wanted to ask this question