@MarioTheNinjaAviator
1) the xml menu is how you can do many complicated things that people make like custom LandingGear
2) go to the mod menu on the home screen and activate xml editor
3) you should see another button in the editor and when you click that a menu should pop up. Their should be a drop down menu on the top part of the menu and you should be able to follow the instructions bellow

@PapaKernels I don't even know what that is. Sorry.

@MarioTheNinjaAviator do you know how to get to xml?

@PapaKernels what do you mean by, go to the xml menu and go to the middle one in the drop down menu on the top and for input type? But, Thank you

1) grab Hinge rotators
2) go to the xml menu and go to the middle one in the drop down menu on the top and for input type LandingGear and for the minimum value make it 0
3) put other rotators and fuselage blocks ( dimensions 0.25 for width and height make the length and rise and run to what you want)
4) make sure to disable collision on everything with the gear.