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  June 25, 2020 | International, Aerospace

  The F-35 Lightning II can’t fly in lightning once again

  By: Valerie Insinna WASHINGTON — The most widely used variant of the F-35 Joint Strike Fighter is currently unable to fly in thunderstorms after the discovery of damage to one of the systems it uses to protect itself from lightning, its prime contractor Lockheed Martin said Wednesday. To safely fly in conditions where lightning is present, the F-35 relies on its Onboard Inert Gas Generation System, or OBIGGS, which pumps nitrogen-enriched air into the fuel tanks to inert them. Without this system, a jet could explode if struck by lightning. However, damage to one of the tubes that distributes inert gas into the fuel tank was discovered during routine depot maintenance of an F-35A at Hill Air Force Base's Ogden Logistics Complex in Utah, Lockheed said in a statement. Lockheed temporarily paused F-35 deliveries June 2-23 as the company validated whether it was properly installing OBIGGS systems. However, “it appears this anomaly is occurring in the field after aircraft delivery,” Lockheed said in a statement. Lockheed has since delivered two F-35s, company spokesman Brett Ashworth said. Because it cannot be confirmed that the OBIGGS system would function properly if the jet was hit by lightning, the F-35 Joint Program Office has opted to institute flight restrictions. “As a safety precaution, the JPO recommended to unit commanders that they implement a lightning flight restriction for the F-35A, which restricts flying within 25 miles of lightning or thunderstorms,” Lockheed said. “We are working with the F-35 Joint Program Office (JPO) on a root cause corrective action investigation to determine next steps.” The issue only seems to affect the F-35A conventional-takeoff-and-landing variant, which is used by the U.S. Air Force and the majority of international customers. The OBIGGS design is slightly different on the F-35B short-takeoff-and-vertical-landing variant due to the aircraft's lift fan, and the problem has not been observed on F-35C carrier-takeoff-and-landing aircraft, Ashworth said. Bloomberg, which obtained a JPO memo dated June 5, reported that flawed tubes were found in 14 of the 24 “A” models inspected. The JPO did not respond immediately to a request for comment. For a plane nicknamed “Lightning II,” the F-35′s lightning protection systems have, ironically, become an embarrassing problem issue for the jet at times throughout its development. The F-35 was prohibited from flying within 25 miles of lightning in the early 2010s after the Pentagon's weapons tester discovered deficiencies with the original OBIGGs system in getting enough inert gas into the fuel tanks. Those restrictions were rescinded after the OBIGGS was redesigned in 2014. https://www.defensenews.com/air/2020/06/24/the-f-35-lightning-ii-cant-fly-in-lightning-once-again/

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  September 9, 2019 | International, Aerospace

  Eurofighter Typhoon defensive aids sub-system enhancement study contract awarded

  The EuroDASS consortium, which comprises Leonardo, Elettronica, Indra and Hensoldt, will spend 18 months exploring future upgrades for the Eurofighter Typhoon's world-class electronic warfare system. The Praetorian Defensive Aids Sub System (DASS) is highly-regarded by users and has kept Eurofighter Typhoon crews safe throughout peace-keeping operations in Libya and Syria. The study will support the ability of the Eurofighter Typhoon's defences to keep pace with new technology and techniques employed by rapidly-developing threat systems. Leonardo, on behalf of the EuroDASS consortium, has received a contract from BAE Systems that will see the consortium explore the future of the Eurofighter Typhoon's ‘Praetorian' Defensive Aids Sub System (DASS). The ‘Praetorian Long Term Evolution (LTE)' study will lay the groundwork for future development work which will ensure that the Typhoon's Electronic Warfare system will remain one of the most advanced in the world for decades to come. The contract is a key part of the wider Eurofighter Typhoon LTE study, which aims to identify a suite of technology enhancements for the Eurofighter Typhoon's weapons system infrastructure and propulsion to provide a clear road map for the future of the platform. The Praetorian DASS is provided by the EuroDASS consortium, which comprises Leonardo, Elettronica, Indra and Hensoldt. It equips the Eurofighter Typhoon with advanced protection from threats including Infra-Red (IR or heat-seeking) and radar-guided missiles. The system is well-regarded by users and has been battle-tested on peace-keeping operations in Libya and Syria. The LTE project will enable Eurofighter Typhoon to be a survivable and effective combat aircraft out to 2060 against a background of accelerating technology development by potential adversaries. The Praetorian Defensive Aids Sub System (DASS) is the Eurofighter Typhoon's protection system, which integrates sensors and jamming equipment to provide exceptional situational awareness and a digital stealth capability for the aircraft, achieved through advanced electronic deception techniques. The Praetorian LTE study will evaluate potential future DASS requirements, enabling the aircraft to cope faster, easier and more affordably with new threats as they arise in the future. The study is expected to deliver options for long-term technical solutions and enablers which will sustain the growth path of the platform in the future. Options are likely to coverboth improved architecture, which new capabilities can be added to in a more agile and lower-cost fashion, and improvements to the exploitation and fusion of sensors to support the multi-role flexibility of the platform. A number of options will be explored and presented to the Eurofighter partner nations to support informed decision making. https://www.eurofighter.com/news-and-events/2019/09/eurofighter-typhoon-defensive-aids-sub-system-enhancement-study-contract-awarded

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  July 10, 2020 | International, Aerospace

  US gives the green light to Japan’s massive $23B F-35 buy

  By: Valerie Insinna   WASHINGTON — The United States on Thursday approved a planned purchase by Japan of 105 F-35 joint strike fighters, moving the country one step closer to becoming the biggest foreign customer of the Lockheed Martin-produced jet. The approved package includes 63 F-35A conventional takeoff and landing aircraft and 42 F-35 short takeoff and landing variants, essentially green-lighting the procurement plans spelled out by Japan in 2018. The Defense Security Cooperation Agency notified Congress of the possible sale, which is worth about $23 billion, although that number could change during negotiations between the country and Lockheed Martin. Those negotiations would start after Congress approves the sale. Also included in the arms deal is: 110 Pratt & Whitney F135 engines, associated electronic warfare and communications systems, the Autonomic Logistics Information System, training gear, infrared flares, a performance-based logistics package, software integration, spare and repairs parts and other support. If Japan moves forward with the purchase, it would have a total of 147 F-35s — becoming the second-largest operator of the joint strike fighter after the United States and just ahead of the United Kingdom, which plans to buy 138 jets. It would also become the fourth user of the F-35B variant, which is being bought by U.S. Marine Corps, the United Kingdom's Royal Air Force and the Italian Navy. Several other sales were also announced on Thursday: Taiwan: The State Department has approved a request by Taiwan to recertify its Patriot Advanced Capability-3 missiles for an estimated cost of $620 million. The package includes replacing PAC-3 components that are near expiration, test and repair of the capability, spare parts for ground support equipment and other logistics support. According to DSCA, “this proposed sale will help sustain the recipient's missile density and ensure readiness for air operations. The recipient will use this capability as a deterrent to regional threats and to strengthen homeland defense.” Lockheed Martin would be the prime contractor for this sale. Germany: If approved by Congress, Germany would get MK 54 All Up Round Lightweight torpedoes, 10 conversion kits and related equipment in a package worth about $130 million. The deal, which help upgrade Germany's P-3C submarine hunting planes, also includes fuel tanks for the torpedo conversion kits, spare parts, launch accessories for the aircraft and various logistics and program support. Raytheon would be the prime contractor for this purchase. Belgium: The State Department also authorized Belgium's request for 29 All Up Round MK 54 LWT Mod 0 torpedoes. The $33 million package includes two Fleet Exercise Section conversion kits, torpedo support equipment, and logistics support. The approval comes as Belgium phases out MK 46 torpedoes and begins using the MK 54 aboard its NH-90 helicopters and multi-mission frigates. Aaron Mehta in Washington contributed to this report. https://www.defensenews.com/smr/2020/07/09/us-gives-the-green-light-to-japans-massive-23b-f-35-buy