UK mulls onboard sensing requirements for satellites

Sur le même sujet

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  3 septembre 2024 | International, Terrestre

  As Iran threatens Israel, Tehran’s missile program remains in question

  A new report suggests one of Iran's advanced missiles is far less accurate than previously thought.

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  22 octobre 2020 | International, Aérospatial

  Pratt & Whitney Awarded Contract for F135 Engine Modernization Study

  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/

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  1 avril 2020 | International, Aérospatial

  The Air Force’s KC-46 tanker has another serious technical deficiency, and Boeing is stuck paying for it

  By: Valerie Insinna WASHINGTON — The Air Force on Monday logged another critical technical flaw for the KC-46 tanker, this time revolving around excessive fuel leaks. Under its contract with the service, KC-46 manufacturer Boeing is responsible for paying for a fix to the problem, Air Force spokeswoman Capt. Cara Bousie said in a statement. “The Air Force and Boeing are working together to determine the root cause and implement corrective actions,” she said. “The KC-46 program office continues to monitor the entire KC-46 fleet and is enhancing acceptance testing of the fuel system to identify potential leaks at the factory where they can be repaired prior to delivery.” The problem was first discovered in July 2019, but the Air Force did not say why the issue had been escalated to Category 1 status — the designation given to problems with a significant impact on operations or safety. The service also did not immediately comment on questions about what sort of receiver aircraft were most involved with the deficiency or the severity of the problem. A Boeing spokesman said that the Air Force had discovered 16 aircraft in need of repair, and that seven have already been fixed. “The KC-46 fuel system is equipped with redundant protection for fuel containment. In some cases with this issue, aircraft maintenance crews are finding fuel between the primary and secondary fuel protection barriers within the system,” the company said in a statement. Boeing is working with “utmost urgency” to address the problem and implement a fix to the remaining aircraft, the statement said. A Boeing spokesman added it would take about 10 days to retrofit each aircraft at the rapid response depot facility in San Antonio, Texas. The fix was also being incorporated into production line in Everett, Wash., which is currently undergoing a temporary suspension due to COVID-19. The latest Category 1 deficiency brings the total up to four: The tanker's remote vision system or RVS — the camera system that allows KC-46 boom operators to steer the boom into a receiver aircraft without having to look out a window and use visual cues — provides imagery in certain lighting conditions that appears warped or misleading. Boeing has agreed to pay for potentially extensive hardware and software fixes, but the Air Force believes it will system won't be fully functional until 2023-2024. The Air Force has recorded instances of the boom scraping against the airframe of receiver aircraft. Boeing and the Air Force believe this problem is a symptom of the RVS's acuity problems and will be eliminated once the camera system is fixed. Boeing must redesign the boom to accommodate the A-10, which currently does not generate the thrust necessary to push into the boom for refueling. This problem is a requirements change by the Air Force, which approved Boeing's design in 2016. Last year, Boeing received a $55.5 million contract to begin work on the new boom actuator. Boeing's fixed-priced firm contract for the development of the KC-46 has a $4.9 billion ceiling that leaves the company responsible for any expenses billed in excess of that amount. So far, the company has paid more than $3.5 billion of its own money to fund corrections to ongoing technical issues. https://www.defensenews.com/air/2020/03/31/the-air-forces-kc-46-tanker-has-another-serious-technical-deficiency-and-boeing-is-stuck-paying-for-it/