19 mars 2024 | International, Terrestre
28 février 2020 | International, Aérospatial
Design Milestone Reached For Air-Launched Hypersonic Missile
Steve Trimble
ORLANDO—Lockheed Martin expects to complete the critical design review (CDR) on Feb. 27 for the AGM-183A Air-launched Rapid Response Weapon (ARRW), the U.S. military's most technologically ambitious hypersonic weapon, an executive said.
The key milestone, indicating an imminent design freeze, comes as part of an unusual development schedule imposed on the ARRW program. The technical complexity of ARRW stems from its high lift-to-drag profile, a shape the U.S. military has never tested successfully in flight. The Defense Advanced Research Projects Agency's (DARPA) Tactical Boost Glide (TBG) program, which shares the advanced ARRW profile, is intended as a risk-reduction measure for ARRW, but still has not completed a self-powered flight test.
In fact, the CDR milestone for ARRW originally was scheduled to come after a first flight for TBG, but the Air Force has kept ARRW on its original pace even as schedules for the DARPA program have slipped.
“The [original TBG and ARRW] schedules were more serial,” said John Varley, vice president of hypersonics for Lockheed's Missiles and Fire Control business. “As we're moving fast, things are merging together and becoming more parallel. If we waited until all that was done, we wouldn't be moving at the pace that the customer is looking for.”
Indeed, Jeff Babione, president of Lockheed's Skunk Works, said last June that he expected the first TBG flight by the end of last year or early next year. But U.S. defense officials now say they expect the DARPA program to enter flight testing later this year, after a planned test of the Block 1 version of the Common Hypersonic Glide Body, a low-lift-to-drag shape for intermediate-range Army and Navy missiles.
In other ways, ARRW is further along in development than most military acquisition projects at the CDR milestone, Varley said.
“It's not the traditional way of doing it, because at CDR you wouldn't have hardware built, you wouldn't have [demonstration/validation] testing done. And this is very mature,” he said.
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18 février 2022 | International, Aérospatial
US Space Force aims for more resilient architecture by 2026
The Space Force's procurement organization is making near-term moves to support a push for more resilient on-orbit capabilities.
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26 janvier 2021 | International, Aérospatial
Missile Defense Agency picks 2 vendors for hypersonic weapon tracking sensor prototypes
Nathan Strout WASHINGTON — The Missile Defense Agency selected two companies to build prototype sensors capable of tracking hypersonic weapons from space. L3Harris and Northrop Grumman will create the prototypes for the agency's Hypersonic and Ballistic Tracking Space Sensor. L3Harris won a $122 million award Jan. 14, while Northrop Grumman received a $155 million award Jan. 22. In tandem with the Space Development Agency's tracking layer, the HBTSS constellation is the Pentagon's answer to hypersonic weapons, which are too dim to effectively track with current sensors in geostationary orbit and can potentially avoid terrestrial sensors. The constellation will be closer to the planet's surface in low Earth orbit, allowing sensors to more easily see the dimmer threat. However, being closer to the Earth's surface results in a far narrower field of view for each satellite. In order to get worldwide coverage, the Pentagon is pursuing a proliferated constellation made up of dozens of satellites. SDA's tracking layer satellites will initially pick up a threat, with each satellite tracking the weapon and then passing off custody to the next satellite as the weapon leaves its field of view. Ultimately, the threat will be passed on to the more sensitive HBTSS, which can provide targeting data. “The combination of high speed, maneuverability and relatively low altitude of some of the emerging advanced missile threats makes them challenging targets for our current missile defense systems,” the agency said in a statement. “HBTSS is needed, since we cannot populate the Earth and the oceans with terrestrial radars to meet this need. The ‘birth-to-death' tracking that HBTSS can provide when integrated with terrestrial sensors will make it possible to maintain custody of missile threats from launch through intercept regardless of location.” Four companies were in the running to build the new HBTSS prototypes, but MDA stated on Jan. 22 that L3Harris and Northrop Grumman will be the two moving forward into the on-orbit prototype demonstration. The other transaction authority contracts covers the prototypes through launch and early on-orbit testing. According to MDA, the prototypes should “demonstrate the sensitivity and fire-control quality of service necessary to support both the emerging hypersonic threat kill chain and dim upper-stage ballistic missiles.” https://www.c4isrnet.com/battlefield-tech/space/2021/01/25/missile-defense-agency-picks-two-vendors-for-hypersonic-weapon-tracking-sensor-prototypes