Articles

Here's what the US military's future helicopter fleet could look like

In what the participants call a "unique" collaboration, government agencies and aerospace corporations are working together to develop advanced platforms and technologies for vertical lift that are intended to replace virtually all the current rotary wing and tilt-rotor aircraft being used by the four U.S. military services.


The results of those efforts are likely to also influence future civilian and international vertical lift programs.

The ultimate goal is to produce a family of vertical lift aircraft that can serve as transports for personnel and cargo and perform attack, scout, search and rescue, anti-submarine and anti-surface ship missions from land or sea at speeds and ranges far exceeding existing capabilities.

During a forum at the Center for Strategic and International Studies in Washington, D.C., Sept. 23, the industry and government representatives said the focus was on achieving the maximum commonality of aircraft components and open architecture in mission systems to reduce production and sustainment costs and promote interoperability among individual aircraft and services.

The Sikorsky X-2. (Courtesy photo)

The coalition of talent is working on two separate but closely related programs: Future Vertical Lift and Joint Multi-role Technology Demonstration, which are managed by the Army with participation by the Navy, Marine Corps and Air Force.

Under the FVL part of the effort, Bell Helicopter is working on an advanced tilt-rotor aircraft called the V-280 Valor, which advances the technologies produced for the V-22 Ospreys that are operated by the Marines and Air Force Special Operations Command and in the future by the Navy.

For FVL, Boeing-Sikorsky team is building a "coaxial" helicopter called the SB-1 Defiant, which uses counter-rotating rotors for vertical operations and a rear-mounted propeller for high-speed level flight. It builds on technology demonstrated by Sikorsky's X-2 that hit speeds of 260 knots, or 300 miles an hour.

At CSIS, Chris Van Buiten, vice president of Sikorsky Innovations, and Vince Tobin, VP for advanced tilt-rotor systems at Bell, said their aircraft will fly next year in preparation for a competitive "fly off" for the FVL program.

Both of those firms, Rockwell Collins and other companies are participating in the JMR program, which is focused on developing a new generation of mission systems and avionics that would go into any future vertical lift aircraft and, the panelist said, could be retrofitted into some of the legacy platforms that are likely to remain in service for decades.

The Rockwell Collins officials said the advanced computer systems being developed in the JMR effort would allow the future vertical lift platforms to be "optionally manned," meaning they could be operated as unmanned systems as well as flown by humans.

Bell has also introduced an unmanned tilt-rotor proposal, the V-247 Vigilant, with a folding wing and rotor for the Marines.

Dan Bailey, program director of JMR/FVL for the Army, said the technology demonstration program is expected to culminate in 2020, and will "set the conditions for the future" as they seek to replace all the military's vertical lift systems over decades.

The FVL competition for the air frame should conclude in 2019, he said.

Bailey said the vertical lift "airframe designs we have today are very limited on what we can get out of them." And the ability to increase efficiency in those platforms "is limited."

"We need new platforms," he said.

Bailey and the others stressed the importance of pushing open architecture capabilities in the systems developed under JMR. Open architecture generally means the software within mission systems and other aircraft avionics is independent of the hardware. That allows rapid and relatively inexpensive changes in the systems as technology improves or mission requirements change.

Bailey said the FVL/JMR program provides the ability to partner with industry "that is unique" and will allow the government "to do this efficiently."

To meet the multi-service requirements of the FVL program, Van Buiten and Tobin said their aircraft could be produced with the rotor and wing folding capabilities that the Navy and Marines require for shipboard operations.

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