Although there is some disagreement in canon about where the Vertibirds actually come from, in Fallout 4 we generally associate them mainly with the Brotherhood of Steel. They have significantly modified the practical aircraft so that they are not only better suited for combat but can also hook onto the Prydwen.

This is exactly the version of the Vertical Take Off and Landing (VTOL) aircraft you can now take home. The Fallout Vertibird Eaglemoss Hero Collector Model is highly detailed so you can see all the modifications and technical refinements. It can't fly, rather it stands on its stable black base just as securely as on the !Prydwen, ready for its next mission.