S97 Raider and JMR/FVL program News + Videos

TerraN_EmpirE

Tyrant King
First the UK then the Australians now most of NATO is taking a look
Next-generation NATO rotorcraft could overlap with FVL

  • 11 MAY, 2017
  • SOURCE: FLIGHTGLOBAL.COM
  • BY: LEIGH GIANGRECO
  • WASHINGTON DC


As the US Army plots the high-speed Future Vertical Lift programme, the North Atlantic Treaty Organisation has commissioned a study group to evaluate the future of the alliance's fleet and develop recommendations for members.

A team of experts held its initial meeting discussing the Next Generational Rotorcraft Capability (NGRC) last July and the NATO Industrial Advisory Group (NIAG) will conduct a study guiding the helicopter replacement implementation, Dan Newman, NGRC study chair and senior technical fellow at Boeing, told an audience at the American Helicopter’s Society’s forum this week.

Newman does not know yet if the next generation rotorcraft will include five separate capability sets like FVL and says NATO is starting its own assessment from scratch.

NATO also has no plans to form a joint international programme with the army, he adds.

“If they happen to be the same, that’s great,” he says. “We’re not going to force them to be the same and we’re not going to listen to FVL, we’re going start from scratch so in the end if they’re using the same physics and the same needs, they’re gonna end up with the same set of recommendations.”

The need for the alliance's members to replace aging rotorcraft took on increased urgency following Russia’s annexation of Crimea in 2014, he says.

To date, the team of experts filled by operators and customers appear to be on the same page as the army and US Defense Department when it comes to vertical lift requirements, Newman says. Yet even if those requirements dovetail between the US joint services and NATO, members could be resistant to alliance-imposed mandates.

“We’ve shown international collaboration can be good,” he says. “We’ve shown forcing can be a challenge.”
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Tyrant King
Sikorsky Raider prototype crash lands
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The Sikorsky S-97 Raider helicopter prototype suffered an hard belly landing while undergoing flight testing from Sikorsky's Development Flight Center in Palm Beach County, Florida on Wednesday morning.

The incident happened while the S-97 was hovering with its landing gear retracted, according to Lockheed Martin spokesperson.

The prototype sustained no major structural damages and the two on board pilots were also not injured.

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The S-97 raider is being developed as a fast light weight tactical helicopter capable of carrying six troops and external weapons, that combine maneuverability, hover ability, range, speed, endurance and survivability.

It features an coaxial counter rotating main rotor system along with a clutched pusher propeller in the aft for forward thrust. The configuration will enable Raider to reach cruise speeds up to 240 knots (276 mph), twice that of conventional helicopters.

Flight testing commenced in 2015, and Sikorsky has built two Raider prototypes. It is powered by a single General Electric YT706 turboshaft engine rated at 2,600 shp (1,900 kW).

The prototype has a gross weight of 11,550 lb (5200 kg) and have a range greater than 600 km.
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Tyrant King
Defiant’s delay due to blade manufacturing challenges
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  3 minutes ago

LONDON — The SB-1 Defiant Joint Multi-Role demonstrator aircraft’s delay for first flight can be attributed to challenges in manufacturing its complex rotor blades for the helicopter’s coaxial design, the U.S. Army’s JMR program manager told Defense News at DSEI, a defense conference in London, on Monday.

“The challenge has been the manufacturing of the blades, which is an interesting challenge,” Dan Bailey said. “Some people would think that’s not technology but actually it is.”

The Boeing-Sikorsky team building the demonstrator for the U.S. Army announced it would not fly in 2017 as planned due unspecified problems.

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Defiant is one of two demonstrators that will fly as part of the JMR program demonstration that will help define and build requirements for the Army’s Future Vertical Lift program of record expected to launch in roughly the 2019 timeframe. Bell Helicopter is building the second demonstrator -- a tiltrotor design called the V-280 Valor. That aircraft will fly in roughly 20 to 30 days, according to Bailey.

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One of the things the Boeing and Sikorsky team is doing under the JMR program is to design a future program that would make the aircraft more affordable. One way of doing that is to move from having people build the rotor blades to having machines that can handle the complex task.

To achieve the proper aerodynamics for a rotor blade, it “requires some very laborious-type manufacturing,” Bailey said. “They are done in a manner that is multi-sheets of composite material and they have to be laid up in certain patterns, certain directions, for strength properties and they do that pretty much today with people.”

The team instead decided to build the rotor blades with a process that uses a machine that lays up the material as it goes, Bailey said.

“The challenge with that is you have to have a tool that allows you to lay up that material,” he added, which is “a long, tube-like configuration and that machine lays up the composite material around it,” to create a rotor blade spar, the main structural part of the blade, Bailey explained.

The tool has to be “a fairly long piece of tool, it can’t have any sag, it has to be very dimensionally specific and structured and that has been a challenge,” Bailey said.

The team started with one type of material to build the tool and then switched to a different material. This alteration ultimately caused the delay.

“The good news about that is we have completely removed that risk,” Bailey said, because it is going to be the same process the team would use to build rotor blades in a program of record.

The team has built two spars using the new tool and the problem seems to be resolved, Bailey said.

Defiant is still on track to fly in the spring or early summer timeframe, Bailey said, but added that the time associated with building all the rotor blades for the demonstrator is about 10 months behind.
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TerraN_EmpirE

Tyrant King
S-97 Raider sustained ‘substantial damage' in crash, but program moves forward
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  4 days ago
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“The neighborhood of the root cause is the complex interaction between the ground, the landing gear, the flight control system and the associated pilot interactions,” he told a few reporters in a phone interview. “If you are familiar with the rotorcraft industry, this is a well-documented complex set of interaction as airplanes transition from operations on the ground to operations in flight.”

The hard landing occurred when the helicopter was in a hover over a landing zone.
The analysis of the hard landing show the transition “didn’t go exactly as it should,” Van Buiten said, “and we are making some changes to the flight control system software to accommodate that and assure that it never happens again.”

Sikorsky is assessing whether the changes to the flight control system should also be applied to the Defiant program.

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The accident did show the safety and protection features in the aircraft are up to snuff such as the retractable landing gear, crash-worthy seats and crash-worthy fuel system.

The landing gear sustained “significant damage,” Van Buiten said, “but the pilots put the aircraft down level on the runway,” the crew shut off the engines and the electrical systems, opened the egress doors, hopped out of the helicopters and walked away from the crash.

While the report notes both pilots received “minor injuries,” Sikorsky said in a statement Monday that the two pilots “suffered minor discomfort, which did not require follow-up medical treatment.”

Sikorsky is still looking into whether the Raider prototype can be salvaged and if it will fly again. In the meantime, Van Buiten said the company is accelerating bringing its second prototype into play.

The second aircraft is “mostly built,” but was put on hold so Sikorsky could incorporate lessons learned from the first prototype, which had flown 20 hours and performed over 100 hours of ground runs before its crash, according to Van Buiten.

The second prototype will pick up where the first aircraft left off and continue to expand the envelope particularly in pushing its speed potentially over 220 knots, Van Buiten said. Additionally, the company will demonstrate some of the maneuvers “that are uniquely possible with the X2 technology,” he added, such as “the ability to hover nose down, nose up and rapid deceleration and accelerations from the landing zone.”

Sikorsky has also been maturing a weapons suite for Raider in its system integration lab and intends to incorporate those on the second aircraft.

“That all happens next year,” Van Buiten said. “We will provide more detail as it evolves as to when some of those exact milestones are.”

A much more comprehensive report from the safety board is still to come and is subject to change, according to the board and Sikorsky. The timing of the release of that report is unknown.
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hey bro you favorite line
...

It's all about the program.:)
right? LOL

anyway:
Lockheed Martin Reaffirms Support For Sikorsky’s Raider

Sep 14, 2017
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Second prototype will be completed to fulfill goals of high-speed helicopter program

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was tantalizingly close to achieving its goal of exceeding 220 kt. with the S-97 Raider coaxial-rotor helicopter when the prototype made a hard landing on Aug. 2, after experiencing flight control problems. But
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, which acquired Sikorsky in 2015 when the industry-funded Raider program was well underway, has been quick to reiterate its commitment to the high-speed light tactical helicopter.

The incident at Sikorsky’s development flight center in West Palm Beach, Florida, came as the 6,000-lb. Raider was taxiing out to begin its 15th test flight, with the target of achieving 180 kt.—its highest speed yet. The goal of exceeding 220 kt. was planned for the next flight, its 16th. Achieving that objective will now have to wait until after the second prototype is completed and flown in 2018.

The fly-by-wire (FBW) Raider was taxiing to its takeoff position when the mishap occurred. The digital flight control system unexpectedly transitioned from simple ground mode to augmented flight mode before the aircraft became airborne. The crew lifted into a hover but, unable to stabilize the helicopter, quickly put it back on the ground, the Raider coming down heavily, upright and level on the runway. The two company test pilots powered down the engine and shut off the electrics before egressing. The Raider suffered substantial damage, but they escaped with minor injuries— the impact-absorbing landing gear, composite airframe and crew seats working as designed.

Investigation is ongoing with the
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(NTSB), but Sikorsky says its other fly-by-wire helicopters—the CH-53K and CH-148 Cyclone—are not affected, as implementation of the Raider’s triplex-redundant control system is different. But any lessons learned from the investigation are being shared with the Sikorsky/
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team developing the SB-1 Defiant Joint Multi-Role demonstrator. Expected to fly by mid-2018, the 30,000-lb. SB-1 shares the same coaxial-rotor/pusher-propeller X2 configuration and a similar FBW control system.

The NTSB has issued only a brief preliminary report, but the suspected cause is a flight-control software issue relating to the “complex interaction between the ground, the landing gear, the flight control system and the pilot,” says Chris Van Buiten, vice president of Sikorsky Innovations. The failure has been reproduced in the S-97 flight simulator, and software changes are being made “to ensure it never happens again.”

Damage to the first prototype is a setback for an industry effort that has slowed significantly since its launch in 2010 as a $200 million follow-on to the Sikorsky-funded X2 Technology Demonstrator, which reached a speed of 262 kt. that year. The Raider first flew in May 2015 with the goal of achieving its key performance objectives by the middle of 2016. But changing customer plans, technical challenges and Sikorsky’s integration into Lockheed all slowed the pace.

The mishap was not related to the coaxial rigid-rotor X2 configuration, says Van Buiten, and Lockheed’s leadership has committed to return Raider to flight once the cause is fully established. Aircraft 1 will continue to support the investigation, so the second prototype, assembly of which had been halted, will be completed and flown in 2018. Changes made to the first prototype as a result of 20 hr. of flight tests and 100 hr. of ground runs will be incorporated into Aircraft 2 before it flies.

After shakedown flights, the goal is to pick up where Aircraft 1 left off and continue expanding the flight envelope beyond 150 kt., out to the maximum speed goal. But more than that, Sikorsky is looking at arming the second Raider for mission demos. Once the S-97 finally achieves its 220-kt. target, the company aims to demonstrate complex maneuvers, including 3g turns, hovering nose-up and nose-down using the prop, as well as rapid level-attitude acceleration and deceleration.

Sikorsky will also install a weapons suite and other mission systems now being matured in the Raider systems integration laboratory. The weapons will include podded machine guns, Lockheed’s next-generation Hellfire—the Joint Air-to-Ground Missile—and
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’ Advanced Precision Kill Weapon System laser-guided rocket.

When Raider was launched with support from more than 30 suppliers, Sikorsky had its sights set firmly on the U.S. Army’s Advanced Aerial Scout (AAS) requirement to replace the Bell OH-58D Kiowa Warrior. But AAS was shelved in 2013, and the OH-58Ds have now retired, replaced with reroled Boeing AH-64E Apaches. The Army’s priority has shifted to the Future Vertical Lift (FVL) Medium program to replace the workhorse
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Black Hawk—for which Sikorsky Boeing’s SB-1 is competing with Bell’s V-280 Valor tiltrotor.

Lockheed’s restated, post-crash commitment to Sikorsky’s Raider reflects the high-speed helicopter’s continued value, both in reducing risk for the SB-1 and in keeping options alive for a future FVL Light program to develop a true replacement for the OH-58D armed scout, as well as the Army’s special-operations Boeing MH-6 Little Bird. “We remain bullish about the program,” says Van Buiten.
 

Air Force Brat

Brigadier
Super Moderator
Well Raider is Sikorsky-Locheed's Baby she is not being built for Uncle Sam. At least not yet. Boeing and Sikorsky are working on defiant which will be the one Uncle Sam has a vested interest in.

Exactly, so the Raider program while strong, is like the FC-31, or as my old man would say?? "like a strapless bra, "no visible means of support??"" Heh! Heh! HEH!

to be honest equation, the lose of the sole airworthy "test article" is a multi million dollar setback,,, look what happened to the F-22 program as the result of a "soft-ware" glitch!
 
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