August 15, 2019 | International, Aerospace
By Graham Warwick
DARPA has formally launched a program to build and fly an X-plane designed around active flow control (AFC), potentially eliminating the need for moving control surfaces.
Designing from the ground up around AFC, rather than modifying an existing aircraft, is expected to yield performance and operational benefits.
A broad agency announcement (BAA) was released on Aug. 12 for the first two of four planned phases of the Control of Revolutionary Aircraft with Novel Effectors (Crane) program. A proposers' day is scheduled for Aug. 26 and proposals are due to be submitted by Nov. 8.
A budget of $21 million is available for multiple awards under the 12-month Phase 0, which will focus on the aircraft design process and understanding the trade space. DARPA expects performers to enter this phase with multiple candidate configurations and flow-control approaches. Each Phase 0 contract will end with a conceptual design review for one or more configurations.
Phase 1 will continue to mature up to two concepts and is expected to involve component-level testing and demonstrations to inform a system requirements review. This nine-month phase is planned to culminate in a preliminary design review for the proposed X-plane.
DARPA plans to downselect to one performer at the end of Phase 1 in second-quarter fiscal 2022 and award a contract for Phase 2 detailed design. This is planned to conclude in a critical design review and lead to a go/no-go decision in the second quarter fiscal of 2023 for Phase 3 building and flying of the X-plane.
First flight is planned for the third quarter of fiscal 2024. DARPA wants a “tactically relevant scale aircraft,” the BAA says. This may include a “clean-sheet design or modification of an existing aircraft.” The agency expects substantial use of off-the-shelf components for the flight demonstrator so that program resources can be focused on AFC development and testing.
AFC modifies the flow field around the aircraft using mechanical or fluidic actuators. The BAA specifically excludes using large external moving surfaces, mechanical vectoring of engine exhaust or other traditional moving aerodynamic control surfaces.
AFC applications identified in the BAA include eliminating moving control surfaces for stability and control and improving takeoff and landing performance, high-lift flight, thick-airfoil efficiency and high-altitude flight. Proposers may identify additional applications and benefits.
A NATO technical study involving Lockheed Martin, BAE Systems and academic institutes in the U.S. and UK identified that an unmanned combat aircraft with AFC could have stealth and other potential performance benefits during the ingress and egress phases of a strike mission.
https://aviationweek.com/defense/darpa-invites-proposals-active-flow-control-x-plane
August 28, 2023 | International, Aerospace
In the distant expanse from the tumultuous battlegrounds of Ukraine, power contest between US and Russia manifests itself prominently within confines of Syria.
June 12, 2020 | International, Aerospace, Naval, Land, C4ISR, Security
By: Joe Gould WASHINGTON ― Plans for a Senate-crafted version of the Pacific Deterrence Initiative, a new military fund to boost deterrence against China in the Pacific, is one step closer to becoming law. The Senate Armed Services Committee has approved nearly $6 billion for the fund in its version of the annual defense policy bill, the panel announced Thursday. It authorizes $1.4 billion in fiscal 2021, which would be $188.6 million above the administration's budget request, and $5.5 billion for fiscal 2022. The bill also directs the defense secretary to create a spending plan for all of the funds. “The best way to protect U.S. security and prosperity in Asia is to maintain a credible balance of military power, but, after years of underfunding, America's ability to do so is at risk,” the committee's summary stated. “The FY21 [National Defense Authorization Act] establishes the Pacific Deterrence Initiative (PDI) to send a strong signal to the Chinese Communist Party that America is deeply committed to defending our interests in the Indo-Pacific. “PDI will enhance budgetary transparency and oversight, focus resources on key military capability gaps, reassure U.S. allies and partners, and bolster the credibility of American deterrence in the Indo-Pacific.” Though not all details of the fund were immediately made public, SASC Chairman Jim Inhofe, R-Okla., and ranking member Jack Reed, D-R.I., previously said they would sponsor a measure to enable U.S. military operations in the region, beyond supporting new weapons platforms. Defense Secretary Mark Esper has said China is his department's top adversary, but said Congress has worked to sharpen the Pentagon's spending and focus in the region. The PDI would follow the form of the multiyear European Deterrence Initiative, which has consumed $22 billion since its inception after Russia annexed Crimea from Ukraine in 2014. Congress will have to internally negotiate the final dollar amount for PDI and what those funds would buy, but House Armed Services Committee Chairman Adam Smith, D-Wash., and ranking member Mac Thornberry, R-Texas, have expressed support for the idea. Though the Senate's approach differs, Thornberry has also proposed spending $6 billion―all in FY21―on priorities that include air and missile defense systems as well as new military construction in partner countries; Smith hasn't released his own plan. Once approved by the full Senate, its version of the NDAA would be reconciled with the House's version, which the HASC is expected to make public late this month before it goes through markup July 1 and advances to the House floor. With an eye on China beyond the PDI, the SASC bill also encourages the Air Force to establish an operating location in the Indo-Pacific region for F-35A fighter jets and to allocate “sufficient resources and prioritize the protection of air bases that might be under attack from current or emerging cruise missiles and advanced hypersonic missiles, specifically from China." There are also a number of provisions aimed at safeguarding America's technology and industrial base from Chinese intellectual property theft and “economic aggression,” according to the summary. The bill would also require reports from the Pentagon on how to mitigate the risks from vendors like Chinese telecom firms Huawei and ZTE when basing U.S. troops overseas. The SASC summary said its proposed PDI would: Increase lethality of the joint force in the Pacific, including by improving active and passive defense against theater cruise, ballistic and hypersonic missiles for bases, operating locations and other critical infrastructure. Enhance the design and posture of the joint force in the Indo-Pacific region by transitioning from large, centralized and unhardened infrastructure to smaller, dispersed, resilient and adaptive basing; increasing the number of capabilities of expeditionary airfields and ports; enhancing pre-positioning of forward stocks of fuel, munitions, equipment and materiel; and improving distributed logistics and maintenance capabilities in the region to ensure the sustainment of logistics under persistent multidomain attack. Strengthen alliances and partnerships to increase capabilities, improve interoperability and information sharing, and support information operations capabilities with a focus on countering malign influence. https://www.defensenews.com/congress/2020/06/11/senate-panel-oks-6-billion-military-fund-to-confront-china/
October 22, 2020 | International, Aerospace
Seapower Staff EAST HARTFORD, Conn. — Pratt & Whitney, a division of Raytheon Technologies Corp., has been awarded a $1.5M contract to conduct an F135 modernization study and operational assessment by the F-35 Joint Program Office to determine specific propulsion system growth requirements for Block 4.2 F-35 aircraft and beyond, the company said in an Oct. 20 release. The study is expected to conclude in March 2021. “This award is a significant milestone for the program and the warfighter, as we look to ensure the F135 propulsion system continues to provide the foundation for all air vehicle capability requirements over the full lifecycle of the F-35,” said Matthew Bromberg, president, Pratt & Whitney Military Engines. “As we look to the future, growth in aircraft capability must be met with matched propulsion modernization. Fortunately, the F135 has ample design margin to support agile and affordable upgrades that will enable all F-35 operators to keep pace with evolving threat environments.” Under this award, Pratt & Whitney will assess F135 engine enhancements required to support future F-35 weapon system capability requirements across all F-35 variants beginning with Block 4.2 aircraft. The scope of the assessment focuses on enhancements addressing improvements to up and away thrust, powered lift thrust, power and thermal management capacity, and fuel burn reduction. Designed with the knowledge that operational environments will evolve and threats will advance, the F135 is postured to meet future F-35 capability requirements. Its modular design and advanced digital architecture allow for the agile development and spiral insertion of both hardware and software upgrades. As part of the study, Pratt & Whitney's GATORWORKS organization will complete the conceptual design and analysis of multiple F135 Engine Enhancement Package (EEP) growth options with phased insertion plans. Leveraging significant U.S. Government and Pratt & Whitney investment in next generation adaptive propulsion technologies, Pratt & Whitney's EEP approach offers low risk, variant-common upgrade options for the F135 that provide increased performance aligned with the program's continuous capability development and delivery strategy and serve as a critical enabler for future capability growth of the F-35 weapon system. The combat-proven F135 is the most advanced operational fighter engine in the world, delivering 26% more thrust, 116% more powered lift, and more than a 300% increase in power and thermal management over 4th generation fighter engines – all with a demonstrated mission capability rate of greater than 94%. “Built upon decades of combat propulsion experience, the F135 provides the warfighter with a critical technological advantage over adversaries at an unparalleled value to the taxpayer,” said Bromberg. “With more than 40,000 pounds of thrust, unmatched low-observable signature, world-class thermal management, and innovative engine control system, the F135 is a critical enabler of the F-35 weapons system and of operations conducted in advanced threat environments – a core element of the National Defense Strategy.” https://seapowermagazine.org/pratt-whitney-awarded-contract-for-f135-engine-modernization-study/