U.S. Agencies Warn of Iranian Hacking Group's Ongoing Ransomware Attacks

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  January 11, 2023 | International, Naval

  How big of a fleet? A look at the US Navy’s size and readiness needs

  Absent the personnel and support needed, additional ships could spend more time at the piers and be less capable at sea.

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  July 29, 2020 | International, Aerospace

  A Modern Solution To Improved Performance, Cost, Use For The Venerable Chinook

  It's the dream of military acquisition in 2020: A new system that drops into place in a current piece of hardware, provides improved performance, easier maintenance, and builds on a legacy of more than 12 million battle-proven hours of operation. It's the T55 714C, Honeywell Aerospace's new variant of the venerable T55 turboshaft engine used on American helicopters and fixed wing aircraft since 1955. The engine's starring role, however, is aboard Boeing's CH-47A and MH-47 rotorcraft, known as the Chinook. The heavy-lift Chinook that has served the Army consistently, as well as international customers, for more than 60 years features two counter-rotating rotors that eliminate the need for an antitorque vertical rotor. The unique design requiring two T55 engines per aircraft allows all the T55's power to be used for lift and thrust and enable perhaps the toughest helicopter pilot maneuver known—the pinnacle landing. In the years since the T55 and Chinook entered service in 1962, Honeywell has delivered more than 6,000 engines, with 2,500 engines in service today supporting 950 aircraft operating in 20 countries. Dave Marinick, Honeywell's President of Engines and Power Systems, says throughout all these years the company has invested in the engine, from its original 1,600 shp capability to today as the T55 produces 4,800 shp to power the Chinook to a maximum speed 196 mph. But now, with Future Vertical Lift and its high-speed rotorcraft on the horizon, Honeywell looked again at what the Army needed to power the Chinook to fill the heavy lift role as the Future Armed Reconnaissance Aircraft and Future Long-Range Assault Aircraft go into service. "Looking back at the multi-decade history, characterized by a close relationship with the Army and an understanding of how the aircraft is used—how the army flies the Chinook, how they maintain the Chinook—we have been able to focus on what is important to our customer," Marinick adds. The Charlie variant of the T55 fits the bill, according to Marinick. It maintains the current engine architecture, while offering 20% more power, nearly 10% improved performance at high and hot altitudes and using 9% less fuel. It includes a modern full authority digital engine control with health monitoring. "We designed in a cost-effective way to increase power to 6,000 shp, and we have a roadmap to increase that up to 7,500 shp," Marinick says. "And while saving gas is one thing, we also are extending the range with the new engine, allowing the pilot to fly or loiter longer, an important option for the operators using this aircraft—whether for military missions, fire suppression or disaster relief." In addition to its performance improvements, the T55 714C features a new compressor and improved reliability and lifecycle. The accessory section has also been redesigned based on feedback from Army customers. In the past, maintainers had to pull the engine entirely to access the accessory section on the number 2 engine. The redesign shifts the accessory section to the top of the engine, providing easier and saving hundreds of man hours to make a switch. There are no changes to the engine mounts, making the T55 714C a drop-in replacement. It can be installed as a full-up new engine or as a kit that is introduced during overhaul. "In this concept, we are turning a maintenance event into much more—a Chinook leaving with new engines, without requiring a block upgrade. We're delivering major performance improvements, without tearing up the aircraft," Marinick says. The engine's tooling, logistics and training remain the same, further reducing the time required to introduce a much-improved engine. The new engine comes with another major change. The U.S. Army has completed a product verification audit to provide approval for Honeywell to open a state-of-the-art T55 Repair and Overhaul Center of Excellence near the company's Phoenix, Arizona headquarters. Marinick says the new facility will increase throughput by two to three times the previous capacity for CH-47 Chinook helicopter fleets. The move also establishes a larger pool of highly trained technicians who will work alongside the engineering team to streamline feedback and help to inform future upgrades. The company has also launched an initiative to ensure on-time delivery of materials from suppliers to support the expanded capacity. "Future Vertical Lift is upon us," Marinick says, "We think of the Charlie as an affordable, responsible upgrade and service designed to keep the Chinook at optimum performance and readiness in a realistic way, through 2060." Honeywell's upgraded T55 Charlie engine is expected to be ready for flight test at the end of 2022. For more Information about the T55, click here.

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  August 14, 2020 | International, Aerospace

  B-21 Avionics Testbed Aircraft Now Operating, USAF Official Says

  Steve Trimble The U.S. Air Force has commissioned a flying testbed aircraft to test the avionics system and software for the Northrop Grumman B-21 bomber, a senior official said on Aug. 13. The first B-21 test aircraft is still being assembled in Palmdale, California, but the flying testbed allows the stealth bomber program to “buydown risk,” said Randall Walden, director of the Air Force's Rapid Capabilities Office, which is managing the program. “We have a flight test aircraft that we've been hosting some of these subsystems on,” Walden said. “We're doing it kind of in a parallel approach, working out some of the bugs with the software as well as the subsystems.” Walden, speaking to the Air Force Association's Mitchell Institute, did not identify the flying testbed, but his remarks come two months after the appearance of a green Boeing 737 owned by the Air Force with registration N712JM. The Lockheed Martin F-35 program also used a 737 to check out avionics and mission systems before test flights of the stealth fighter started in 2006. “When you can buydown risk with subsystems on even another platform, no matter what it is like you get into the air and use some of the software and work those bugs out it goes a long way,” Walden said. The Air Force expects to field the B-21 in the mid-2020s, about a decade after awarding the engineering and manufacturing development contract to Northrop in 2015. The development program remains on track, but Walden is eager to begin testing as soon as possible. “All of the tough critical designs, all of the hard engineering, is behind us,” Walden said. “I know we're not going to be immune from design flaws. We're going to have to work through those, and we're doing some of that today. I want to find out what those design deficiencies are as fast as I can to get on with the solution.” https://aviationweek.com/defense-space/aircraft-propulsion/b-21-avionics-testbed-aircraft-now-operating-usaf-official-says