I have a little airport. I like a airplane to drive or move around there. I tried:
for i = 1,500 do
Airplane.Position = Airplane.Position + Vector3.new(0,0,5)
wait(0.01)
end
& a tutorial by Roblox using BodyPosition
But these only works with parts/unions for me. How do I smooth move a whole model?

2 comments
weld it together and then move the main part of the weld (C0)
You can just do wait() instead of wait(0.01) , Also,the less you move it,the smoother it will be.