Eurocopter X3 (X Cubed) Experimental Compound Helicopter (2010)
The compound Eurocopter X3 helicopter development combines a traditional mast-mounted main rotor with side-mounted propeller units.
The overall design of the X3 features pleasing and well-contoured lines from nose to tail. As in the EC155, the X3 sports a finely sharpened nose assembly with the two-person cockpit just aft. A passenger compartment is located directly behind the cockpit seats. The main powerplant is fitted within the engine compartment mounted atop the fuselage. The twin engine arrangement powers the main rotor installation as well as a pair of propeller-based systems and there is no conventional tail rotor as seen on contemporary helicopters (the portside propeller spins at less RPMs than the starboard mounting, countering the inherent torque effect from the main rotor). As such, energy is not wasted along a long shaft to the tail rotor but instead added to the forward speed output. The empennage is smooth and rounded to the extreme aft end to which a pair of horizontal fins are affixed. The undercarriage is completely retractable.
Power for the X3 comes from the 2 x Rolls-Royce Turbomeca RTM322 series turboshaft engines each delivering 2,270 shaft horsepower. These powerplants rotate a five-bladed main rotor atop the fuselage as well as a pair of five-bladed tractor propeller systems fitted to wingstubs along the fuselage sides. Cruise speed is expected to be in the vicinity of 252 miles per hour. A service ceiling of 12,500 feet is estimated.
Only a single prototype form of the X3 has been completed. Some sources state that EADS intends the X3 to be a true production-ready helicopter and not a technology demonstrator or "proof of concept" design. Only time will tell for sure. Text ©2003-2013 www.MilitaryFactory.com • All Rights Reserved • No Reproduction Permitted
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Specifications for the
Eurocopter X3 (X Cubed)
Experimental Compound Helicopter
Country of Origin: France
Manufacturer: Eurocopter - France
Initial Year of Service: 2010
Production: 1
Focus Model: Eurocopter X3 (X Cubed)
Crew: 2
Length: 0.00ft (0m)
Width: 0.00ft (0.00m)
Height: 0.00ft (0.00m)
Weight (Empty): 0lbs (0kg)
Weight (MTOW): 0lbs (0kg)
Powerplant: 2 x Rolls-Royce Turbomeca RTM322 turboshaft engines delivering 2,270 shaft horsepower each and driving a five-bladed main rotor and 2 x five-bladed side-mounted propellers.
Maximum Speed: 253mph (407kmh; 220kts)
Maximum Range: 0miles (0km)
Service Ceiling: 12,500ft (3,810m; 2.4miles)
Rate-of-Climb: 0 feet per minute (0m/min)
Hardpoints: 0
Armament Suite:
None.
Variants:
X3 - Base Series Designation
Operators: None.
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