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Two Biden-Era Flashpoints Where The F-35 Fighter Could Prove Decisive
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March 16, 2020 | International, Aerospace
Japan unveils its hypersonic weapons plans
By: Mike Yeo
MELBOURNE, Australia — Japan has outlined its research and development road map for its homegrown, standoff hypersonic weapons, confirming that it is seeking an incremental growth in capability and providing more details about the kinds of threats it is targeting with this new class of weapon.
In a Japanese-language document published on the Acquisition, Technology and Logistics Agency website, the government said two classes of standoff hypersonic systems will be deployed — the Hypersonic Cruise Missile (HCM) and the Hyper Velocity Gliding Projectile (HVGP).
The former will be powered by a scramjet engine and appears similar to a typical missile, albeit one that cruises at a much higher speed while capable of traveling at long ranges.
The HVGP, on the other hand, will feature a solid-fuel rocket engine that will boost its warhead payload to a high altitude before separation, where it will then glide to its target using its altitude to maintain high velocity until impact.
The agency also provided more details regarding warhead payloads, with different warheads planned for both seaborne and land targets. The former will be an armor-piercing warhead designed specifically for penetrating “the deck of the [aircraft] carrier,” while a land-attack version will utilize a high-density, explosively formed projectile, or EFP, for area suppression.
Area suppression effects for the latter will be achieved via the use of multiple EFPs, which are more commonly known as a shaped charge. An EFP is made up of a concave metal hemispherical or cone-shaped liner backed by a high explosive, all in a steel or aluminum casing. When the high explosive is detonated, the metal liner is compressed and squeezed forward, forming a jet whose tip may travel as fast as 6 miles per second.
Japan's road map also revealed the country is taking an incremental approach with regard to designing the shapes of warheads and developing solid-fuel engine technology, with plans to field early versions of both in the 2024 to 2028 time frame. They are expected to enter service in the early 2030s.
The agency expects both systems to navigate via satellite navigation with an inertial navigation system as backup. Japan is seeking to establish a network of seven satellites to enable continuous positioning for its self-defense forces, which will enable it to provide continuous navigation data without relying on foreign satellites.
Warhead guidance is achieved via either radio-frequency imaging converted from doppler shift data — which the government agency said will be able to identify stealthy naval targets in all weather conditions — or an infrared seeker capable to discriminating specific targets.
Japan has been conducting R&D into various areas related to hypersonic weapons for a number of years, although most of it was to benefit other fields like satellite navigation and solid-fuel rockets.
More work remains, however, in areas like hypersonic guidance systems, warhead and missile-body thermal shielding, and hypersonic propulsion systems in order for Japan to be able to field a viable standoff hypersonic weapons capability.
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June 8, 2020 | International, Land
U.S. Army Flickr Page Inadvertently Reveals New Hypersonic Weapon Concept
Steve Trimble A new hypersonic weapon concept has emerged inadvertently on a social media page managed by U.S. Army Secretary Ryan McCarthy that describes a Mach 5-plus projectile with the ability to penetrate into defended airspace and dispense a multi-role loitering air system over a target area. The concept—labeled as the Vintage Racer Loitering Weapon System—reveals a solution to an operational problem for the Army: When high-speed munitions, such as the Long-Range Hypersonic Weapon (LRHW), enter service with the ability to strike targets thousands of kilometers away, how will the Army find the most elusive targets, such as road-mobile launchers for intercontinental ballistic missiles (ICBM) or radars for air defense batteries? The Vintage Racer concept, as revealed so far, suggests it may be possible to launch a hypersonic projectile into a general area without knowing the specific location of the target. As it reaches the target area, the projectile may be able to dispense a loitering air system, which is then uses its own sensors to find and identify the target. If the loitering system also carries a warhead, it may be able to strike the target by itself or transmit the target coordinates to another weapon. Once the existence of the Vintage Racer concept appeared, a Russian expert on military-political affairs noted such an idea has been discussed as a possibility within the hypersonic weapon community. “The fear is that [this] hypersonic ‘something' might reach the patrol area of road-mobile ICBM launchers [after] penetrating any possible air and missile defense, and then dispense loitering submunitions that will find launchers in the forests,” said Dmitry Stefanovitch, an expert at the Moscow-based Russian International Affairs Council. Only the broadest information about the Vintage Racer weapon is visible on the briefing paper describing the concept. The image appears in an album of photos from the Association of the U.S. Army convention posted to McCarthy's Flickr account last October. Most of the pictures from the event show McCarthy meeting attendees, giving speeches and receiving informal, standing pitches from industry officials in the exhibit hall. One picture shows McCarthy standing at a table across from an unidentified industry official in the exhibit hall. The table is covered with multiple objects, including a General Atomics press release, what appears to be a model of the LRHW and a rifled barrel of a 155mm artillery gun with a hole burned through the object. The table also is covered with at least four sheets of briefing papers, of which three are not visible. The only visible paper, which is partly obscured by McCarthy's right hand, is headlined “Vintage Racer - Loitering Weapon System (LWS) Overview.” The paper includes six main bullet points, which read “Hypersonic Ingress,” “Survivable,” “Time Over Target,” “Multi-role,” “Modular payload,” and “Cost Imposition Strategy.” Ten sub-bullets are also visible on the page, but the letters are not readable. At the bottom of the page, a tag line highlighted in yellow is partly obscured by McCarthy's hand, but the visible portion reads: “Long Range, Rapid Ingress.” A vague reference to Vintage Racer previously appeared in Defense Department budget justification documents released in February, but went unnoticed. Under a line item owned by the Office of Secretary of Defense for a “quick reaction fund,” Vintage Racer is described as a “recent success story.” “The project successfully validated aerodynamic design with wind tunnel testing and integrated a guidance subsystem for targeted kinetic effects before culminating in a fiscal 2019 flight test. Documentation and prototype technologies transitioned to the U.S. Army for additional development and follow-on acquisition activities,” according to budget documents. https://aviationweek.com/defense-space/sensors-electronic-warfare/us-army-flickr-page-inadvertently-reveals-new-hypersonic
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July 18, 2024 | International, C4ISR, Security
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