I was wondering,is there a separate transparent support stand for the VTOL units or is it already stuck on?

The clear plastic stock that they sit on is a seperate piece. When you get a VTOL, you get the base, the stick, the vtol, and either one or two rotors, depending on the type of VTOL.

Are they packed in plastic?

And how can the VTOLs rotate with 2 rotors?Can you give me an example each of a 1-rotor and 2-rotor VTOL?

*sigh* Yes, VTOLs are all packed in plastic.

They can rotate because one rotor is placed higher than the other usually.

1 rotor - Sprints, Crows, Balacs, Donars & Lampreys
2 rotor - MHI Crane

Why the "sigh"?

Cool,so you can put it on the shorter rotor as well...

Cool,one of the Crow is transparent!