The Sikorsky-Boeing SB-1 Defiant coaxial helicopter demonstrator is now undergoing rigorous testing prior to its first flight expected later this year, according to Boeing and Sikorsky company officials.

Defiant is likely to fly later than the summer, Randy Rotte, Boeing’s director of global sales and marketing for cargo helicopters and Future Vertical Lift, said in a recent interview.

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’s aircraft fly by “late this summer.”

“First flight is an important milestone in any developmental program,” Rotte said. Yet, “I 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.”

The Army is assessing two flight demonstrators 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.

The Army’s 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 while Defiant is still working toward that milestone.

Defiant experienced some delays due to a rotor blade manufacturing issue.

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, not accelerating.

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.

Koucheravy was even hesitant to name a specific date for Defiant’s first flight “because 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 ‘do not exceed’ criteria for our components, and we will fully test out the system so that we have a good productive test flight program,” he said.

“We will fly when it’s right and safe. We are not going to rush to get up on some artificial date,” Koucheravy said.

The team is taking a phased approach to its test program that is not just centered on the aircraft, he added.

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. “In 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,” Koucheravy said. “So 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.”

The team is building “a lot of reliability, a lot of hours on all those hardware, software components that will inform our test program,” he said.

Boeing and Sikorsky are also building a powertrain system test bed next to where the aircraft is currently coming together at Sikorsky’s developmental flight center in West Palm Beach, Florida.

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, all of the elements of a flight-worthy powertrain, and plans to get 50 or more good hours on all the major systems before Defiant flies, according to Koucheravy.

The aircraft is mostly built, he added, and the team has already tested “basically 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.”

The blade-manufacturing issue that slowed down the process to build the aircraft is “mostly behind us,” Koucheravy noted.

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.

Part 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,” Boeing’s Rotte said.

Boeing and Sikorsky had to push the envelope on the manufacturing side to build a rotor blade that had never been built before.

While the blades are now being steadily produced, “once you produce them, you have to test them, and we’ve got to go through all the elements after that. So it’s not just building them, it’s making sure your build process went according to plan” and that they fit on the aircraft, Rotte said.

“We 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,” Koucheravy said.

Arms Industries

@armsindustriesusa #AI

You must be logged in to post a comment.

FFL TERMS & CONDITIONS

This is a controlled item and requires shipping to an authorized Federal Firearms License (FFL) holder. It is your ultimate responsibility to ensure you are in compliance with all rule and regulations that apply to the purchase of firearms and ammunition.

Once you have completed the checkout process and submitted your order, contact your preferred FFL dealer and request they submit a signed copy of their FFL to us via email to ffl@armsindustries.com. To ensure order accuracy, please remember to include your name and order number when emailing us. Failure to do so may delay processing your order.

Please Note: All items in this order will be shipped together. If you have non-FFL items on this order that you would like shipped directly to you, please place them on a separate order.

There will be a 30% restocking fee for all controlled items returned due to a failed background check or a denied underage purchase.

Federal law requires that you be 21 years or age or older to purchase a stripped receiver or frame. If a frame or receiver can only be made into a long gun (rifle or shotgun), it is still a frame or receiver not a handgun or long gun. However, they still are "firearms" by definition, and subject to the same GCA limitations as any other firearms. See Section 921(a)(3)(b). 18 U.S.C. Section 922(b)(1) makes it unlawful for a licensee to sell any firearm other than a shotgun or rifle to any person under the age of 21.

For more information, please see How to Buy a Gun Online

0

Checkout Instructions

Please Read Carefully

STEP 1 – For security, customers billing name and shipping address MUST match that of the credit card used for payment. Shipping address reflects billing address associated with your credit card, NOT the shipping address of your FFL dealer.

NOTE: If your order includes a firearm, whether you know your preferred FFL dealers contact information or not, please read “STEP 2” below carefully then proceed with checkout process.

STEP 2 – Once you have completed the checkout process and submitted your order online order to us, contact your preferred FFL dealer and request they submit a signed copy of their FFL to us via email to ffl@armsindustries.com. In an effort to ensure order accuracy, please remember to request they include your name and order number when emailing us. Failure to do so may delay processing of your order.