Ok, so I caved in and saw the movie Avatar recently. It was pretty good, but I could not help but notice the aircraft that were used. Some I did not like because of their size or firepower, but two caught my eye: the Scorpion and the Samson.
Now, the Scorpion is a gunship:
And the Samson however is a troop transport.
Both are twin- rotor helicopters with two counter rotating blades in each engine.