Helicopters Duo X,The Fastest in the World

                The name they both use the letter X. Which one is Sikorksky X2, the other named Eurocopter X3.
Both helicopters are capable of flying faster than ordinary helicopters.

          Using the body Eurocopter Dauphin, X3 has several modifications from its predecessor's.
As quoted from the site Physorg, X3 adds an extra engine that is used to drive two extra propellers located in the short wing on either side of its body.
While only using one extra machine, but the aircraft is still at the stage of the experiment was able to run faster than a regular helicopter.

          When the helicopters normally used to fly between 240-260 miles per hour (kph), X3 is capable of flying as fast as 430 kph with the stable. This speed puts the X3 to be one of the world's fastest helicopter.
This helicopter is projected to be used for purposes of search and rescue mission search and rescue, coast guard duties, border patrol missions, offshore operations, up to intercity transportation.
As for military purposes, these helicopters can be used for special forces operations, rescue, transporting troops, as well as medical evacuation.

          But the X3 is still losing speed by Sikorsky X2 helicopter, which is currently still in the pilot phase. At the trial of 15 September 2010, Sikorsky X2 successfully drove at speeds of up to 460 kph in stable flight.

In fact, this helicopter can travel at 480 kph with the flight angle decreased slightly.
Unlike the X3 Eurocopter, Sikorsky X2 coaxial rotor using blades with a double and reinforced with extra propeller at its tail.
This helicopter uses a variety of new technologies, including systems Fly-by-Wire system that allows the engine to operate efficiently.
With the speed achieved during trials, X2 has scored an unofficial record as the world's fastest helicopter.

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