12 juin 2019 | International, Aérospatial, Naval
By: David B. Larter and Valerie Insinna
WASHINGTON — The U.S. Navy wants more from the F-35 jet's radar, which in sea-search mode is limited to what is directly in front of the aircraft, according to documents exclusively obtained by Defense News.
According to the documents, the radar, Northrop Grumman's AN/APG-81 active electronically scanned array radar, can either hone in on a sector based on a specific point on the ground, or work in what is commonly known as “snowplow mode,” which, as the name suggests, searches everything in front of the aircraft.
The Navy wants to be able to scan a wider area when in sea-search mode, something that the radar is currently not set up for, according to officials who spoke to Defense News.
Officials also said the problem is on track for a solution, but may not be implemented until as late as 2024 with the Block 4 upgrades, notably adding that a solution will not be in place before a full-rate production decision on the F-35 this year.
Ultimately, giving the Navy what it wants will be a matter of boosting computing power and upgrading software, officials explained.
The issue is listed as a category 1 deficiency, according to the documents, which further define the limitation as something that means “adequate performance [is] not attainable to accomplish the primary or alternate mission(s).” The issue dates back to 2012, according to the documents. In this scale, category 1 represents the most serious type of deficiency.
It's unclear why the issue is listed as a deficiency. The system is working in accordance with design specifications, according to both the documents and a statement from a Lockheed Martin executive.
“The F-35's current radar sea search function meets the enterprises' expressed required specification," said Greg Ulmer, Lockheed Martin's general manager of the company's F-35 program. “As we modernize the F-35, we are bringing enhanced search capabilities, which represent an increase from the original requirements, and we stand ready to integrate the upgrade in the future, based on customer priorities and direction.”
In an interview with Defense News, the head of the Pentagon's F-35 program office, Vice Adm. Mat Winter, said the issue was being resolved by software and computing upgrades, and there would be no requirement for a new radar.
“We're not mechanically scanning, we're electronically scanning,” Winter said. “And being able to accurately scan the maritime environment, it just takes increased computing power, and that's what we're doing. ... It's a software fix, and then an allocation of computing power.”
Winter may be referring to a planned bundle of computer upgrades called Tech Refresh 3, where the jet will get more modern computing systems that will increase the jet's processing power and memory. According to one document obtained by Defense News, TR3 is a prerequisite for a future radar fix. Those TR3-equipped jets won't roll off the production line until 2023.
Defense News submitted written questions to the Defense Department's F-35 program office concerning these and other deficiencies, but it did not respond by press time, despite multiple follow-ups over a period of months.
A retired fighter pilot, who reviewed the documents for Defense News and agreed to speak on condition of anonymity, agreed with Winter's assessment that the fix was likely software-based.
Early on in the F/A-18's APG-79 AESA radar, there were glitches in the operation, but software updates smoothed out the system. Fixing the APG-81 should follow a similar track as the aircraft progresses, the pilot explained.
“As long as the array itself is technically sound, I suspect over time they'll be able to find ways to continue to build out capability through software updates,” the retired fighter pilot said.
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STRATFORD, Conn., Sept. 24, 2019 /PRNewswire/ -- Lockheed Martin (NYSE: LMT) today announced the Sikorsky HH-60W Combat Rescue Helicopter (CRH) program achieved a Milestone C decision from the U.S. Air Force, which moves the program into low rate initial production. The Combat Rescue Helicopter will perform critical combat search and rescue and personnel recovery operations for all U.S. military services. View the latest CRH video. The four instrumented test aircraft at the Sikorsky Development Flight Center in West Palm Beach, Florida, demonstrated their production readiness during rigorous U.S. Air Force (USAF) performance and flight load survey testing. The joint Sikorsky and USAF flight test team has executed over 150 hours of envelope expansion flights, which provided USAF the data necessary to execute a Milestone C decision. This decision allows Sikorsky to begin production of the aircraft, which is based on the venerable BLACK HAWK helicopter. "This affirmative Milestone C decision validates the modifications to Sikorsky's most successful BLACK HAWK helicopter, making it capable of saving downed airmen anytime, anywhere around the world," said Greg Hames, Sikorsky program director. "This establishes the Combat Rescue Helicopter as a production program." Prepared for Production There are five CRH aircraft in various stages of production at Sikorsky's Stratford facility. Sikorsky employees and our nationwide supply chain are ready to begin production and support delivering this all new aircraft to the warfighter. The USAF program of record calls for 113 helicopters to replace its predecessor, the Sikorsky HH-60G PAVE HAWKs. "We have just successfully gained approval to launch the production of a helicopter that will save the lives of our warfighters and our allies all over the world. This decision begins the transition to this more capable and reliable helicopter to fulfill the Air Force's mission to leave no one behind. I could not be more proud of our government-contractor team for making this happen," said Col. Dale R. White, Program Executive Officer, Intelligence, Surveillance, Reconnaissance and Special Operations Forces, USAF. The CRH is significantly more capable and reliable than the HH-60G PAVE HAWK. The aircraft hosts a new fuel system that nearly doubles the capacity of the internal tank on a UH-60M BLACK HAWK, giving the USAF crew extended range and more capability to rescue those injured in the battle space. The CRH specification drives more capable defensive systems and enhances the vulnerability reductions, hover performance, electrical capacity, avionics, cooling, weapons, cyber-security, environmental, and net-centric capabilities beyond the current HH-60G. For additional information, visit our website: www.lockheedmartin.com/crh. About Lockheed Martin Headquartered in Bethesda, Maryland, Lockheed Martin is a global security and aerospace company that employs approximately 105,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. SOURCE Lockheed Martin https://news.lockheedmartin.com/2019-09-24-Sikorsky-Combat-Rescue-Helicopter-Approved-to-Enter-Production