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17 juillet 2014 4 17 /07 /juillet /2014 11:20
Le Bell V-280 «Valor»


12/07/2014 avia news


Dans le cadre du programme de démonstration du futur hélicoptère tactique (JMR-TD) en vue du remplacement des actuels Sikorsky UH-60 «Black Hawk», l’hélicoptériste Bell-Textron présente son V-280 «Valor».


Le Bell V-280 «Valor» dont le design a été présenté pour la première fois le 10 avril 2013, lors de l'Army Aviation Association of America Annual Professional Forum and Exposition à Forth Worth au Texas se décline comme le futur hélicoptère potentiellement capable de remporter cette compétition. Le V-280 est un aéronef multi-rôle susceptible de répondre au programme «Vertical Lift Program» du département de la Défense. L'armée américaine et le ministère de la Défense sont en effet, à la recherche d’un hélicoptère capable à l’avenir de voler a une vitesse de 230 nœuds, en lieu et place des 140 actuels.


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28 juin 2014 6 28 /06 /juin /2014 11:20
Remplacement des UH-60 Blackhawk de l'US Army : premières décisions en août

Le Defiant reprend la formule de l’hélicoptère hybride, testé sur le démonstrateur technologique X-2 - photo Boeing Sikorsky


26/06/2014 à 21h31, par François Julian, à Mesa (Arizona) – Air & Cosmos


C'est en août prochain, que le Pentagone et l'US Army devraient choisir deux industriels pour poursuivre le programme JMR-TD (Joint Multi-Role Technology Demonstrator), pour le remplacement des hélicoptères UH-60 Blackhawk de l'US Army.


A ce jour, quatre industriels, ou équipes d'industriels, prétendent à ce remplacement : Bell Helicopter associé à Lockheed Martin, Boeing associé à Sikorsky, AVX Aircraft et  Karem Aircraft.


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14 juin 2013 5 14 /06 /juin /2013 06:20
Cost drove EADS from US Army rotorcraft demonstration

Jun. 13, 2013 by Dave Majumdar – FG


Washington DC - EADS North America pulled out of the US Army's Joint Multi-Role technology demonstrator (JMR-TD) programme because the cost of developing a high-speed rotorcraft compared to the funding the service is willing to provide is enormous, says the company's top official.


"The number was set so low and the estimate we came back with to develop was so high; this was an invitation to shovel cash into an inferno," says Sean O'Keefe, chief executive of EADS North America.


The army wants the companies participating to develop complex technologies given very limited government funding over a set period of time, O'Keefe says. The maximum service commitment was $75 million over several years, which also covered flyable test articles. "We estimated the cost to be far in excess of that number by multiples," he says. "Wonderful invitation, but we passed."


EADS, O'Keefe says, will continue developing its X3 high-speed compound helicopter design for the civilian market. The offshore oil market is one example where companies would pay for speed, he says. There are also other potential markets where a high-speed civilian rotorcraft could serve, O'Keefe says.


However, O'Keefe notes that the EADS North America JMR-TD proposal was not totally based on Eurocopter's X3 prototype, but it did leverage aspects of that aircraft's technology. The X3, O'Keefe explains, was designed for a very specific purpose and could not directly be developed into an operational military aircraft.


In the future, O'Keefe says, the company could potentially return to bid on the army's follow-on Future Vertical Lift (FVL) programme, which is expected to commence after the JMR-TD prototypes have flown in 2017. "If down the road they say: 'Gee, that's really interesting, we'd like to talk to you about it,' I would say: 'Sure, let's have a discussion,'" he says. However, unless the army had firm requirements in mind, EADS would not be willing to participate in such a programme.


The FVL effort aims to replace the Sikorsky UH-60 Black Hawk series of helicopters after 2030

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6 juin 2013 4 06 /06 /juin /2013 07:20
Bell Helicopter V-280 Valor tiltrotor design

Bell Helicopter V-280 Valor tiltrotor design

Jun. 6, 2013 by Dave Majumdar – FG


Washington DC - Bell Helicopter says that its V-280 Valor third-generation tiltrotor design has been selected by the US Army for its Joint Multi-Role technology demonstrator (JMR-TD) programme.


"The V-280 Valor will provide the army's most sought-after capability, with a cruise speed of 280kt [519km/h]," says Keith Flail, director of Bell's future vertical lift effort. The service hopes to develop an aircraft that can achieve a cruise speed of at least 230kt for the JMR-TD effort and its follow-on Future Vertical Lift programme.


Flail says the V-280 improves on the technology found in the Bell Boeing V-22 Osprey and is being designed to provide "outstanding" low-speed agility, multiple-g high-speed manoeuverability, superior fuel efficiency and improved range capabilities. Much of the aircraft's handling characteristics will be due to a new triple redundant fly-by-wire system that Bell hopes to incorporate into the machine.


The aircraft is also being designed to hover out of ground effect at a pressure altitude of 1,830m (6,000ft) at an ambient temperature of 35˚C (95˚F). Bell claims the V-280 will cruise at speeds of 280kt true airspeed and have a combat range of between 500nm (926km) and 800nm. It should also be able to self-deploy over a distance of 2,100nm.


Flail also claims the aircraft will have improved reliability and reduced costs, because the new clean sheet design reduces complexity compared to previous generation tiltrotors.


Bell's main competitor during the JMR-TD programme is expected to be a team consisting of Sikorsky and Boeing, which was its partner on the V-22. The two companies are pitching a high-speed compound helicopter design based on Sikorsky's self-funded X2 prototype for the army technolody demonstrator effort.

US Army selects Bell, Sikorsky/Boeing team for JMR demonstration

“The Sikorsky Boeing team is extremely pleased to have been invited by the US Army to negotiate a technology investment agreement for the Joint Multi-Role Technology Demonstrator Phase I programme,” the two companies say. “Our team brings a shared commitment to invest in next-generation rotorcraft technology based on Sikorsky’s X2 rigid rotor coaxial design.” Meanwhile, EADS North America recently told the army that it will drop out of the programme.


The army is expected to award JMR-TD contracts by September 2013, with first flights scheduled for 2017. The programme is expected to inform the Future Vertical Lift programme, which aspires to field a new medium-lift high-speed rotorcraft design to replace the Sikorsky UH-60 Black Hawk series in the 2030s. It could also spawn an effort to replace the Boeing AH-64E Apache attack helicopter. That market could be worth as much as $100 billion, according to Bell.

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