7644 MX-81 Hypersonic Operations Aircraft

7644 MX-81 Hypersonic Operations Aircraft is a Mars Mission set released in 2008.
== Description ==
The MX-81 is one of the largest aircraft vehicles used by the Astronauts. Inside is a detailed lab which has an x-ray machine.In the lab you can also see two crystals which are used as "fuel" for the ship. Also included is an Alien vehicle and a small Astronaut mining vehicle. The drill on the mining vehicle rotates when the wheels are moved.You can land and reload it by releashing the platform on the back of the ship by pressing a button which is in front of the handle of the Hypersonic Operations Aircraft(HOA). Two patrol space crafts, a small one and one with more lasers, can be separated from the main vehicle.
The HOA can also launch a missile and has a handle so one can play with it with ease. There is also a translusent orange capsule to store the captured Alien and a translusent yellowish green box with a "radioactive" sticker on it to store the energy crystals(you get a total of four in the set). Finally a small satellite can be detached 
Three Astronauts, a glow-in-the-dark Alien, and Alien Commander minifigures are included.
== Notes ==
* The set resembles the set 6980 Galaxy Commander released in 1983 in the Classic Space theme.
* The HOA appeared in the online game, CrystAlien Conflict. It is the base in the astronaut special ops' levels.
* From the 2008 Mars Mission wave only set 7644 MX-81 Hypersonic Operations Aircraft and set 7647 MX-41 Switch Fighter have the translusent orange capsule to store captured Aliens or energy crystals.
* The Alien Commander (Mars Mission) is only included in sets 7644 MX-81 Hypersonic Operations Aircraft, 7645 MT-61 Crystal Reaper, 7646 ETX Alien Infiltrator and 7649 MT-201 Ultra-Drill Walker
* In Space Adventures - Mars Alien Attack, it is revealed that one cockpit has controls for the lasers, while the other has control for steering
== LEGO.com Description ==
== Minifigures Included ==
== Gallery ==
Hypersonicopcraft.jpg|The set in its entirety
7644 Aircraft.jpg|The Hypersonic Operations Aircraft
7644 Alien Ship.jpg|The Alien Fighter
7644 Astronaut Vehicle.jpg|The Astronaut vehicle
7644 View.jpg|The HOA head-on
== External links ==
Category:2008 sets
Category:Mars Mission
Category:7000 sets
Category:Sets listed for ages 8-14