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X4: Remarkably Different

By Stephen Pope / Published: Sep 21, 2012
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Eurocopter X4

Eurocopter X4

Even as Eurocopter continues with the rapid development of its X3 compound helicopter, the company is planning a two-phase introduction of the advanced X4 helicopter, with the first version entering service in 2017 followed by the second in 2020.

The X4 is an EC 155 replacement that Eurocopter says will test the boundaries of what buyers think about conventional rotorcraft design. The first product based on X4 technology will be a medium twin in the 9,000- to 11,000-pound max gross weight category, with first test flights occurring in 2015. The intermediate configuration will be followed by a second, updated variant that will feature a radically different cockpit design and fly-by-wire controls.

Top executives at Eurocopter have called the X4 a game changer, saying its noise footprint will be as much as 70 percent lower and fuel consumption will be improved by 30 percent. So far, all we have to go on are the artist’s renderings that the company has released, which look promising. We’ll fill you in as more details emerge.

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iused2fly's picture

Exactly how do artists' renderings look "promising", Steven? I'm all for pumping Eurocopter's tires and all, but can we at least wait until they have something other than a paper airplane before saying how promising they might be? By the way, 70% (or 30 %) lower than what? is a noise footprint the same as a noise signature?

Fly-by-wire saves weight an eliminates old-style control paths. Rotor blades which seem to morph into winglets seems feasible. A ducted tail rotor isn't a radical departure and might lower the noise a bit. Not sure how such a rotor might combine with a lower drag airframe and a more fuel efficient turbine to reduce the noise footprint by a staggering 70%. A lower drag airframe would help with the noise thing, which is a bigger issue in Europe than North America. Lowering the fuel flow seems mostly a function of a newer design of powerplant and lower drag airframe.

I assume we'll see the X4 in a James Bond movie sometime later this decade.

Douglas M
Surrey, BC

spope's picture

Based on the drop-dead-gorgeous rendering and claimed performance, use of the word "promising" probably doesn't go nearly far enough. As for the 70% and 30% improvements, it's reletive to current rotorcraft technology. We don't yet know how Eurocopter intends to hit those ambitious targets, but that's part of what makes the X4 so intriguing.

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