22 août 2019 | International, Aérospatial

B-21 Development Applying Tough Lessons From B-2

By Lee Hudson

PALMDALE, California— The U.S. Air Force is taking lessons learned from the plagued B-2 Spirit bomber development program and applying them to the next-generation B-21 Raider.

While it is unknown when the B-2 will retire, the aging stealth bomber may end up flying alongside the B-21.

The B-2 bomber flew its inaugural flight 30 years ago from the Plant 42 runway here. Today, the Northrop Grummansite is preparing for development of the Raider and two newly erected beige buildings have popped up, likely tied to the next-generation bomber.

Although technical and acquisition problems inundated B-2 development, the classified B-21 is taking a different approach. Many details remain classified, but the company and service officials acknowledge the team is being run by the Rapid Capabilities Office instead of a traditional program office.

B-21 development appears to be progressing; the Air Force's No. 2 officer—Air Force Vice Chief of Staff Gen. Stephen Wilson—has said first flight is slated for December 2021. But House Armed Services seapower and projection forces subcommittee Ranking Member Rep. Rob Wittman (R-Va.) alerted the public last year that there was a problem with the inlet design for the B-21's Pratt & Whitney-manufactured engines. Wittman says those issues were fully addressed and the program has made tremendous progress.

“I've been pretty impressed by what both the Air Force and what Northrop Grumman have done in addressing these particular issues and I think we're on the right course,” he says. “Getting those things right to begin with and setting the tone and path I think is critically important.”

An Air Force illustration issued in 2016 of the B-21 design suggests it may closely resemble the B-2. “The B-2 will be setting the path course for the B-21,” says Janis Pamiljans, aerospace systems sector president at Northrop Grumman. “What we've learned on B-2 are finding themselves baselined in the design for B-21 for supportability, sustainability, [and] mission capable rate.”

The aging B-2s must be overhauled every nine years and are taken off the flight line for up to 12 months. Maintenance includes modifications and upgrades to antenna technology, avionics and software systems, costing U.S. taxpayers an average of $60 million for each aircraft, says Richard Sullivan, vice president and B-2 program manager at Northrop Grumman.

Separately, the Air Force is funding the $3 billion B-2 Defensive Management System Modernization (DMS-M) program to enhance the aircraft's direct attack capability and upgrade its integrated air defense systems. The current DMS was designed in the 1980s and has not received any upgrades.

“By leveraging ‘state-of-the-art' electronic warfare antennae, processors, controller and displays, B-2 aircrews will realize unprecedented situational battlespace awareness and dynamic, real-time threat avoidance in the most complex radio frequency emitter environments,” the Air Force says. “The inherent increased sensitivity of the modernized DMS over the legacy system, with increased processing power, will build a battlespace picture that could be shared with joint force platforms by onboard communication systems.”

DMS-M is facing a possible eight-month delay as the service works with Northrop Grumman to implement an agile software development framework, Air Force acquisition executive Will Roper told lawmakers in March. Engineering and manufacturing development for the effort goes through July 2022, according to fiscal 2020 budget documents.

Lawmakers acknowledge it is important that the nation's only operational stealth bomber remain relevant. But the House Armed Services Committee is concerned about DMS-M schedule delays, according to a report accompanying the lower chamber's mark of the fiscal 2020 defense policy bill.

“Unless the B-2 DMS-M program makes significant changes, there may continue to be delays that will impact the success of the program,” the report says. The committee directs the Air Force to brief members on sufficient government software development expertise; contract definitization schedule; delivery schedule; determination of software baseline; and an assessment of related DMS-M-related program support.

The Senate Armed Services Committee also is asking for answers regarding the U.S. bomber force. The upper chamber is requesting a brief on an updated bomber road map and plans for B-2 life cycle sustainment, among other items, according to a report accompanying the Senate's mark of the fiscal 2020 defense authorization bill. The upper chamber also would require details on Raider basing.

To date, the service has been “real[ly] happy with the way Northrop has approached” the B-21 program, says Maj. Gen. James Dawkins, Eighth Air Force commander and overseer of the Joint-Global Strike Operations Center. The next-generation bomber completed a successful critical design review in December.

“Everything I hear is that cost, schedule and performance is right on expectations,” Dawkins says.

https://aviationweek.com/defense/b-21-development-applying-tough-lessons-b-2

Sur le même sujet

  • Hanwha-led team launches Redback vehicle for Australian Army competition

    13 janvier 2021 | International, Terrestre

    Hanwha-led team launches Redback vehicle for Australian Army competition

    By: Mike Yeo MELBOURNE, Australia — Hanwha-led Team Redback officially launched its Redback infantry fighting vehicle on Tuesday ahead of delivering three for evaluation trials as part of a risk mitigation effort for the Australian Army. The infantry fighting vehicles are undergoing trials as part of Project Land 400 Phase 3, which is tasked to acquire about 450 tracked IFVs that will replace Australia's fleet of M113AS4 armored personnel carriers. The Redback, which is named after a venomous spider found in Australia, is up against Rheinmetall's Lynx KF41 for the program, which is due to announce a winner in 2022. The risk mitigation effort involves detailed test and evaluation of the vehicles throughout 2021 with the aim of providing objective quality evidence to support a government decision on the preferred platform. Team Redback is the group of companies led by Hanwha Defense Australia, and includes Electro Optic Systems, Elbit Systems and several other Australian companies. Protection for the Redback meets STANAG Level 6 requirements (a NATO standard), and is fitted with a range of active and passive protection systems in addition to survivable seats in the troop compartment, a floating floor to mitigate the effects of mines or improvised explosive devices, and Plasan-made add-on armor. The passive protection system includes Elbit laser warning devices providing all-around coverage, while active protection comes in the form of the Israeli company's Iron Fist active protection system. The Redback is based on South Korea's AS21 infantry fighting vehicle and is fitted with an EOS T2000 turret mounting a Mk44S Bushmaster II 30mm cannon and a 7.62mm coaxially mounted machine gun. An EOS R400 four-axis remote weapons station is also mounted on the turret roof and can be fitted with a range of weapons including machine guns or an automatic grenade launcher. Grant Sanderson, CEO of the Defense Systems division at Electro Optic Systems, told Defense News that the coronavirus pandemic has slowed efforts to integrate the turret, pointing out that having to fly engineers between Australia, Israel and South Korea has been a challenge. However, the lethality testing of the integrated turret is continuing and is expected to culminate in a live-fire demonstration of the turret with Australian optics and systems in August. The Redback is also designed with ride comfort in mind, with rubber tracks and independent suspension in lieu of more common metal running gear and torsion bar suspension. Hanwha added that noise reduction measures has also meant it is possible to conduct conversations in the troop compartment, even when the vehicle is moving. https://www.defensenews.com/industry/2021/01/12/hanwha-led-team-launches-redback-vehicle-for-australian-army-competition/

  • DARPA contract aims to design circuits in months, not years

    20 septembre 2018 | International, Aérospatial, C4ISR

    DARPA contract aims to design circuits in months, not years

    By: Brandon Knapp The Defense Advanced Research Agency announced an $8 million contract modification for the University of Southern California's Information Sciences Institute to work on a program that develops circuits that be quickly adapted rather than wholesale reinvented. The work is part of DARPA's Circuit Realization at Faster Timescales (CRAFT) research program. The modification brings the total value of the contract to $28 million, according to a Sept. 17 announcement from the Pentagon. The program is designed to dramatically shorten the design cycle and the expense numbers for custom integrated circuits, which are essential in a wide variety of military equipment such as drones and tactically useful 3D imagery production. Currently, it can cost up to $100 million and take more than two years to design these circuits, according to a DARPA release. The CRAFT program aims to cut that timeline down to a matter of months. “Reducing the time and cost for designing and procuring custom, high-efficiency integrated circuits, should drive more of those in the DoD technology community toward best commercial fabrication and design practices,” CRAFT program manager, Dr. Linton Salmon in a program information release. “A primary payoff would be a versatile development environment in which engineers and designers make decisions based on the best technical solutions for the systems they are building, instead of worrying about circuit design delays or costs.” Work will be performed by USC in Marina Del Ray, California, with an expected completion date of December 2019. DARPA has been working on the program since 2015. https://www.c4isrnet.com/industry/2018/09/19/darpa-contract-aims-to-design-circuits-in-months-not-years

  • Lockheed offers Japan majority of work in plan for new fighter jet

    23 août 2018 | International, Aérospatial

    Lockheed offers Japan majority of work in plan for new fighter jet

    YUKIO TAJIMA, Nikkei staff writer TOKYO -- Lockheed Martin has proposed that Japanese companies be responsible for more than half of the development and production of a next-generation fighter jet that Japan wants to introduce in 2030, Nikkei learned Wednesday. Lockheed is offering Japan an upgraded version of the existing F-22. The U.S. currently bans exports of the plane known as "the Raptor," which is considered the world's most powerful fighter, has stealth capabilities and is armed with eight air-to-air missiles. The U.S. aircraft manufacturer's decision to open the production to Japan comes out of the belief that there is little risk of technology leaks. The company also says providing the jet to Japan would contribute to the security of Asia. If the share of work pans out as proposed, it would strengthen Japan's defense industry and the Japan-U.S. alliance. Lockheed's proposal comes in response to concerns in Japan that American companies might monopolize the development and production of the upgraded warplane, leaving little room for Japanese partners' involvement. The company calls the plan a Japan-led framework. The next-generation fighter will replace Japan's F-2 jets, scheduled to retire around 2030. Tokyo initially looked for ways for Japan Inc. to completely develop a successor on its own, hoping to boost the domestic defense industry's orders, but the idea proved unfeasible due to technological and cost hurdles. The Japanese government sees Lockheed's proposal, which could deliver high performance at reduced development costs, as the most promising alternative. The next-generation fighter program is estimated to cost about 6 trillion yen ($54.2 billion), including development, acquisition and maintenance. Some voices are citing a need to update the F-22, which has been deployed since around 2000, and Lockheed's plan has the benefit of lowering upgrade costs shouldered by the U.S. Although Japan produced 60% of the jointly developed F-2, the U.S. handled engine development since Japan did not have the basic technology at the time. But Lockheed has expressed a willingness this time to shift development and production of new engines to major Japanese heavy machinery maker IHI in the future. If IHI's XF9-1 jet engine is adopted, Japanese companies could be responsible for more than 60% of the total work. In addition, the exports of high--margin military equipment for the project could ease the U.S. trade deficit with Japan. Mitsubishi Electric's fighter jet electronics system could be adopted, and Mitsubishi Heavy Industries will handle the development and production of wings, according to the plan. The aircraft's body, engines and the fighter system are to be made in the U.S., but Lockheed intends to use more Japanese-made components, incorporating them gradually until Japanese companies play a central role in development. To hasten development, Lockheed will send Japan F-22s that have not been deployed by the U.S. Air Force so that it can grasp its performance in advance. The updates will improve the plane's main wings and allow more fuel to be loaded, increasing the jet's range to about 2,200 km so it can be used to defend isolated islands and other missions. Although the F-22 has the most advanced stealth abilities in the world, it requires a special coating that is laborious to maintain. Maintenance will be simplified by using the same material as the F-35 stealth fighter, making it easier to perform drills and deploy for battle. One challenge is the cost. Lockheed estimates the price of the next-generation fighter will be far higher than the F-35's 15 billion yen-per-jet price tag. Lockheed estimates the price of a next-generation F-22 at about 24 billion yen if it is part of an order of 70 aircraft. Producing 140 of the jets could reduce the unit price to about 21 billion yen. There is also concern that including Japanese companies, which have not independently developed a fighter jet in recent years, could complicate production and ramp up costs. Lockheed initially estimated that the F-35A would cost about 10 billion yen per jet. Costs temporarily rose to 17 billion yen, however, when assembly was given to Japanese companies, a cause for concern this time. Some doubt that the U.S. will fully disclose core technology for the world's most powerful fighter jet. Although Lockheed plans to outfit the jet with several Japan-made weapons in an effort to include as much domestic technology as possible, the U.S. will initially be responsible for most of the work, with Japanese companies gradually joining the process later. It is unclear, however, when development will proceed to that second stage. "It is likely that the U.S. will not want to give up such core technologies as fighter systems and software," said Heigo Sato, a professor at Takushoku University. "The technological spillover to Japanese companies would be limited if they mostly receive subcontracting work." Although Mitsubishi Heavy assembles the F-35, which has begun deployment, it has been pointed out that having that job has hardly improved the company's technology knowledge. The U.S. Congress also turned down Japan's request for the F-22 to succeed the F-4 a decade ago because of hesitance about transferring military technology. Should technology transfers from the U.S. slow, it may hinder Japan's continued development of fighter jet technology. Japan must choose whether to develop its own jet, jointly develop with another country or update existing aircraft. Tokyo will make its decisions at the end of the year in its revised medium-term defense program. Boeing and Britain's BAE Systems have also made submitted proposals to upgrade existing planes. https://asia.nikkei.com/Politics/Lockheed-offers-Japan-majority-of-work-in-plan-for-new-fighter-jet

Toutes les nouvelles