sorry for the delay, i locked myself out with the wrong password. I don't have a receiver. I removed a side panel to see its function, the replaced it after learning it. It looks very similar to those retract motors in those pics. I had thought that it might be for landing gear but I've never seen one before.
They also came with a 'Y' connector I presume makes it possible to activate them simultaneously. Being that there is no wheel attached. I suppose they could work with anything that needed to open and close or slide in and out etc.
These are brand new, do you know anybody that could use something like these? I don't need them.