11 novembre 2024 | International, Sécurité
Why Sweden nixed new wind farms for fear of missing Russian missiles
There are a number of ways that wind turbines, and especially large groups of them, can mess with the readings from a radar system.
21 décembre 2020 | International, Aérospatial
Here’s why the Valkyrie drone couldn’t translate between F-35 and F-22 jets during a recent test
WASHINGTON — Earlier this month, the U.S. Air Force embarked on a hotly anticipated test: Could it use a semiautonomous drone, in this case a Kratos XQ-58A Valkyrie equipped with a special payload, to stealthily translate and send data between F-35 and F-22 fighter jets?
Air Force leaders still think the answer is “yes,” but because of technical issues encountered during the test, proof that the concept works is still months away.
During the Dec. 9 demonstration at Yuma Proving Ground in Arizona, the Valkyrie was outfitted with gatewayONE, a system capable of translating information from the F-35′s Multifunctional Advanced Data Link and the F-22′s Intra-Flight Data Link into a format that can be understood by other aircraft, all while maintaining a low probability of enemy forces intercepting that data.
But “shortly after takeoff, the communications payloads lost connectivity,” leaving nine out of 18 test objectives incomplete, the Air Force said in a news release.
Early feedback from the test team indicates that, during the rocket-assisted takeoff of the Valkyrie, some of the gatewayONE hardware came loose from where it was mated to the drone, said Air Force acquisition executive Will Roper.
“We think we had a connector that came loose during it because the gateway itself was fine when the Valkyrie landed. So [it's] a thing we've learned from and we'll fix next time,” he told reporters Dec. 18 during a Defense Writers Group roundtable. “Next time we get out, flying in the next on-ramp, we'll probably check those soldering points more than one time.”
Despite the setbacks, the Air Force still clocked in a number of wins during the exercise.
Because the service had a second, land-based version of gatewayONE, it was able to use that system to pass targeting cues from an F-35 to an F-22 and exchange other data between the two aircraft. GatewayONE also pushed data that usually is confined to operations centers on the ground to the F-35 and F-22, while allowing those aircraft to send precise location data back through the translating system to the operations center.
Although the Valkyrie couldn't transmit data between the F-22 and F-35, it still safety demonstrated that it could fly semiautonomously in operations with the two stealth jets for the first time ever.
Aside from the inclusion of the XQ-58A, it's unclear how the Dec. 9 demonstration differs from ground tests of a similar system during the first Advanced Battle Management System on-ramp exercise in 2019.
During that demo, the Air Force rigged together a number of radio systems built by F-35 and F-22 prime contractors Lockheed Martin and Northrop Grumman with antennas from Honeywell, and the aircraft flew over the test stand, exchanging data, officials said.
As early as 2015, Northrop has touted its Freedom 550 radio as a translator for the F-35 and F-22, but it is unknown whether the technology is part of the gatewayONE system. The Air Force did not respond to questions from Defense News seeking more information about gatewayONE, such as a request to identify the manufacturer.
During a phone call with reporters on Dec. 16, Air Force Chief Architect Preston Dunlap said the next opportunity for the service to experiment with the gatewayONE payload onboard Valkyrie is during the Advanced Battle Management System experiment slated for May 2021.
Using a low-cost, expendable drone like the XQ-58 to transmit data between platforms is a contrast from the Air Force's usual approach for solving communications challenges among its assets, Dunlap said. Usually, as new data links or waveforms are developed, aircraft must be retrofitted with new radios and apertures — an expensive and time-consuming process that often leaves platforms out of the loop.
“It's obvious to me that it's not a winning strategy and is a real estate problem on some of these platforms, but then it's a lost opportunity because when you have diversity of pathways, you have greater assurance,” he said.
By creating a small, modular payload like gatewayONE that can be carried by a number of manned and unmanned aircraft, the Air Force will have more options for getting data into the cockpits of all of its planes.
“The real big win — and we heard this from the pilots themselves — is being able to push information into their cockpits so that they have access to it in a way that is operationally relevant and useful to them,” Dunlap said. “It's not all the data they would want, but it has opened a door that's amazing. So we've got to keep pushing the technology.”
The Dec. 9 test was carried out by personnel from the Air Force Research Laboratory, Air Force Life Cycle Management Center and the 46th Test Squadron from Eglin Air Force Base, Florida.
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18 décembre 2018 | International, Aérospatial
Boeing, Embraer agree to KC-390 joint venture
By: Valerie Insinna WASHINGTON — Brazilian aerospace firm Embraer and Boeing have officially formed a joint venture on Embraer's KC-390 multimission aircraft as part of a larger partnership on the companies' commercial sides. Under the new agreement, Boeing and Embraer will work together to “promote and develop new markets” for the KC-390, according to a statement released early Monday. Embraer will own a 51 percent stake in the KC-390 joint venture, with Boeing owning the rest. The announcement on the KC-390 comes as the companies approved the terms of a strategic partnership that gives Boeing an 80 percent stake in Embraer's commercial and services business for $4.2 billion. Before the parties move forward with the transaction, the government of Brazil — which holds a “golden share” in Embraer — must consent to the agreement, and the deal is also subject to the approval of shareholders and regulatory agencies. “Boeing and Embraer know each other well through more than two decades of collaboration, and the respect we have for each other and the value we see in this partnership has only increased since we announced our joint efforts earlier this year,” said Dennis Muilenburg, Boeing chairman, president and CEO. “We are confident that this partnership will deliver great value to Brazil and the Brazilian aerospace industry as a whole. This alliance will strengthen both companies in the global market and is aligned with our long-term sustainable growth strategy,” said Paulo Cesar de Souza e Silva, Embraer president and CEO. Boeing and Embraer have partnered on the KC-390 before. The companies agreed to pacts in 2012 and 2014 that gave the U.S. firm a role on global marketing and logistics support of the KC-390. However, in the wake of the commercial Boeing-Embraer deal, officials said a new KC-390 joint venture could be broader in scope than those partnerships. How this new joint venture differs from past agreements is unclear, and the news release contained only sparse details. According to a July 5 memorandum of understanding between the two companies, a KC-390 joint venture would “grow KC-390 sales and aftermarket opportunities through joint efforts in sales, marketing, engineering and industrial collaboration,” hinting that the partnership could involve an enhancement of the KC-390's capabilities or Boeing's help on technology and industrial development. In October, a Brazilian newspaper reported that Boeing and Embraer were discussing the prospect of building a KC-390 plant in the United States. https://www.defensenews.com/air/2018/12/17/boeing-embraer-agree-to-kc-390-joint-venture/
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3 juin 2019 | International, Terrestre
US Army to free up another $10 billion for priorities
By: Jen Judson WASHINGTON — The U.S. Army is freeing up another $10 billion to apply to its top priorities in its next five-year budget plan, according to the service's undersecretary. “We are about to slap the table on the [program objective memorandum] here by no later than the middle of June,” Ryan McCarthy told a group of reporters during a May 29 media roundtable in his office. As part of a rigorous review of programs and spending, the Army set out to find $10 billion within the budget that could be reallocated toward priorities in its fiscal 2021-2025 program objective memorandum. The money shook out through another round of what the Army informally calls “night court,” a review process that freed up $30 billion in the last budget cycle to get ambitious modernization programs off the ground. The night court process was inspired by similar reviews conducted under Robert Gates when he was defense secretary. Rather than make $182 billion worth of decisions in a few hours, the process is meant to establish a deliberate route to applying funds against priorities, McCarthy said. For example, if a program didn't contribute to a more lethal battlefield or to one of the Army's six modernization priorities, it was canceled or downsized. The Army set up a new four-star command — Army Futures Command — last year to tackle the service's top six modernization priorities: long-range precision fires, the next-generation combat vehicle, future vertical lift, the network, air and missile defense, and soldier lethality. The review was conducted with the Army chief, vice chief, secretary and undersecretary at the head of the table last summer. But this year, to establish a more sustainable model, leadership fell to the major four-star commands and civilian heads in charge of major offices like acquisition and manpower. “Every dollar counts in this environment,” McCarthy said. “And so what we've done is we've realized that it's not a sustainable model to have the entire Army leadership hunkered down every summer, but should delegate to the appropriate echelon of authority.” Only the most difficult decisions will be brought to the top four Army leaders, he added. When it comes to finding another $10 billion across the five-year planning period to apply to priorities, McCarthy said, “we are in very good shape there.” The Army is also working to shift spending so that 50 percent is applied to new programs and 50 percent to legacy systems in the FY24-FY25 time frame. In FY17, the Army was applying 80 percent to legacy programs and 20 percent to bringing on new capabilities. https://www.defensenews.com/land/2019/05/31/army-freeing-up-another-10-billion-for-priorities/