S.H.I.E.L.D. Helicarrier

The S.H.I.E.L.D. Helicarrier is a hi-tech aircraft carrier used by S.H.I.E.L.D., designed to be itself capable of independent powered flight in addition to the conventional functions of aircraft carriers.

The Avengers
To be added

Captain America: The Winter Soldier
To be added

Description
In The Avengers, the helicarrier resembles an aircraft carrier with two decks (the main one for taking off, the other a slanted deck for landing). It is powered by four colossal fans. It serves as an airborne base for S.H.I.E.L.D., as well as a landing and takeoff platform for aircraft such as the F-35 Lightning II and Quinjets.

It makes an appearance again in Captain America: The Winter Soldier, although with a slightly different design. It appears to use a different means of propulsion, possibly large repulsors.

Trivia

 * The Helicarrier appears in the game Iron Man 2. The preview video for the game reveals that Tony Stark was the one who built it. It is shown as the S.H.I.E.L.D. base throughout the game, but also as a weapon. At one point, it is attacked by A.I.M. forces; however, they are defeated by the combined forces of Iron Man and War Machine. At the end of the game, it is destroyed, on purpose, when it crashes into the giant Ultimo.
 * It is almost similar to the Ultimate version of the S.H.I.E.L.D. Helicarrier that is used. The only difference is the Ultimate version almost looks like a Destroyer-class battleship while the movie version looks like a Aircraft carrier-class ship.
 * Also, if you notice that the main engines and some parts of the ship resembles that of the Daedalus-class ships from Stargate: SG-1.