{"id":41001,"date":"2018-03-14T18:44:37","date_gmt":"2018-03-14T18:44:37","guid":{"rendered":"https:\/\/one.sightlinemg.com\/defensenews\/uncategorized\/2018\/03\/14\/defiant-undergoing-rigorous-testing-prior-to-first-flight-this-year\/"},"modified":"2026-08-07T23:19:38","modified_gmt":"2026-08-07T23:19:38","slug":"defiant-undergoing-rigorous-testing-prior-to-first-flight-this-year","status":"publish","type":"post","link":"https:\/\/one.sightlinemg.com\/defensenews\/digital-show-dailies\/global-force-symposium\/2018\/03\/14\/defiant-undergoing-rigorous-testing-prior-to-first-flight-this-year\/","title":{"rendered":"Defiant undergoing rigorous testing prior to first flight this year"},"content":{"rendered":"\n

Correction: Boeing\u2019s Rotte said Defiant would fly later \u201cthan\u201d this summer.<\/i><\/p>\n\n\n\n

WASHINGTON \u2014 The Sikorsky-Boeing SB-1 Defiant coaxial helicopter<\/a> demonstrator is now undergoing rigorous testing prior to its first flight expected later this year, according to Boeing and Sikorsky company officials.<\/p>\n\n\n\n

Defiant is likely to fly later than the summer, Randy Rotte, Boeing\u2019s director of global sales and marketing for cargo helicopters and Future Vertical Lift, told Defense News in a recent interview.<\/p>\n\n\n\n

In February, Lt. Gen. Paul Ostrowksi, the military deputy to the Army acquisition chief, told senators during a hearing, that the Army hoped to have Boeing\u2019s aircraft fly by \u201clate this summer.\u201d<\/p>\n\n\n\n

\u201cFirst flight is an important milestone in any developmental program,\u201d Rotte said. Yet, \u201cI would submit that we are really focused on providing information to the Army throughout the whole flight test program to inform them as they go forward, as they are doing their analysis of alternatives, as they are doing their technical readiness assessment, as they are preparing for their program of record.\u201d<\/p>\n\n\n\n

The Army is assessing two flight demonstrators<\/a> as part of an effort to inform requirements for its Future Vertical Lift family of helicopters that are expected to reach an initial capability in the 2030s.<\/p>\n\n\n\n

[Future Vertical Lift poised to get Army out of the acquisition dark ages<\/a><\/i>]
<\/p>\n\n\n\n

The Army\u2019s Joint Multi-Role (JMR) program allows for yearlong flight test programs for both the Bell V-280 Valor tiltrotor aircraft and Defiant. The V-280 took its first flight<\/a> while Defiant is still working toward that milestone.<\/p>\n\n\n\n

Defiant experienced some delays due to a rotor blade manufacturing<\/a> issue.<\/p>\n\n\n\n

While the Army is looking for ways to expedite bringing FVL aircraft into service, recently released fiscal 2019 budget documents reveal the schedule could be slipping<\/a>, not accelerating.<\/p>\n\n\n\n

Sikorsky and Boeing are taking a very specific and calculated approach to getting Defiant airborne, according to Rich Koucheravy, Sikorsky business development director for FVL.<\/p>\n\n\n\n

Koucheravy was even hesitant to name a specific date for Defiant\u2019s first flight \u201cbecause we are not focused on a date, per se; what we are focused on is when we do fly Defiant, we will have been through all of those activities, and we have already begun to build some of our \u2018do not exceed\u2019 criteria for our components, and we will fully test out the system so that we have a good productive test flight program,\u201d he said.<\/p>\n\n\n\n

\u201cWe will fly when it\u2019s right and safe. We are not going to rush to get up on some artificial date,\u201d Koucheravy said.<\/p>\n\n\n\n

\"\"
A Sikorsky-Boeing team is designing the second demonstrator aircraft — the SB-1 Defiant — in the JMR program ahead of the Army’s FVL program of record. Defiant is expected to fly later this year.<\/figcaption><\/figure>\n\n\n\n

The team is taking a phased approach to its test program that is not just centered on the aircraft, he added.<\/p>\n\n\n\n

There are several big pieces at play. First, the team has a software integration lab in Stratford, Connecticut, that is hooked up to a flight simulator. \u201cIn that lab are all the hardware, the flight-worthy software, hardware boxes and of course all the servos, all the actuators that operate the flight-control systems for this aircraft in a lab,\u201d Koucheravy said. \u201cSo when those pilots are working on the flight control software and developing that while they are flying the simulator, they are actually putting time on those flight-control components.\u201d<\/p>\n\n\n\n

The team is building \u201ca lot of reliability, a lot of hours on all those hardware, software components that will inform our test program,\u201d he said.<\/p>\n\n\n\n

Boeing and Sikorsky are also building a powertrain system test bed next to where the aircraft is currently coming together at Sikorsky\u2019s developmental flight center in West Palm Beach, Florida.<\/p>\n\n\n\n

The test bed is essentially an aircraft that replicates Defiant on an iron frame strapped to the ground. The team is installing engines, transmission, rotor blades \u2014 all of the elements of a flight-worthy powertrain \u2014 and plans to get 50 or more good hours on all the major systems before Defiant flies, according to Koucheravy.<\/p>\n\n\n\n

The aircraft is mostly built, he added, and the team has already tested \u201cbasically all of the systems on board the aircraft that support flight, so our hydraulics, our electrics, our avionics, our fuel systems, everything has been completely tested.\u201d<\/p>\n\n\n\n

The blade-manufacturing issue that slowed down the process to build the aircraft is \u201cmostly behind us,\u201d Koucheravy noted.<\/p>\n\n\n\n

Part of the Joint Multi-Role program tasking includes coming up with ways to manufacture elements of possible future helicopters and requires the development and maturation of some advanced processes.<\/p>\n\n\n\n

\u201cPart of this is the reality of building a one-off, building prototypes using existing tooling, not purpose-built tooling, and these blades are definitely different than blades on Chinook, Black Hawk or Apache, whatever. And building them in a different manner, they have different properties to support,\u201d Boeing\u2019s Rotte said.<\/p>\n\n\n\n

Boeing and Sikorsky had to push the envelope on the manufacturing side to build a rotor blade that had never been built before.<\/p>\n\n\n\n

While the blades are now being steadily produced, \u201conce you produce them, you have to test them, and we\u2019ve got to go through all the elements after that. So it\u2019s not just building them \u2014 it\u2019s making sure your build process went according to plan\u201d and that they fit on the aircraft, Rotte said.<\/p>\n\n\n\n

\u201cWe are confident that as we finish the final build, we will be in the air in 2018 and we believe our plans support that and we are going to have a very successful, risk-reduced, deliberate and safe test program on Defiant because we have already learned a tremendous amount by iterating flight control software, hardware and all the power train before we lift off the ground for the first time,\u201d Koucheravy said.<\/p>\n","protected":false},"excerpt":{"rendered":"

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