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  19 août 2019 | International, Naval

  Questions about US Navy attack sub program linger as contract negotiations drag

  By: David B. Larter WASHINGTON — The U.S. Navy is months behind schedule getting its latest batch of Virginia-class attack subs under contract, and no resolution appears imminent — leading to mounting concerns that delays on the Virginia will affect the Navy's top acquisition priority, the Columbia-class submarine. The contract for the 10-ship Block V Virginia-class attack submarine was supposed to be signed in April, but Navy and industry sources say that there has been a lot of talk and little agreement between the service and the two shipbuilders, General Dynamics Electric Boat and Huntington Ingalls Newport News. Intended to integrate acoustic upgrades and an 84-foot section for additional strike missile tubes, the delayed contract for the Block V Virginias have instead turned into just the latest warning sign that all is not well in Virginia-land, as schedules have slipped and at least one of the builders is now bleeding profits. Furthermore, it's unclear what the Navy's buying profile for Block V will be, which is subject to both contract negotiations and Congressional action on the fiscal year 2020 budget. The anxiety over Virginia delays, however, are less about Virginia, which is still a strong performing program — especially when compared with other programs such as the Ford-class carrier — but are more driven by the potential for compounding issues bleeding over into the Columbia-class. Both submarines will be drawing on the same workforce and supplier base, which is already showing signs of strain. The Navy says the delays are part of ongoing negotiations and that the schedule should not be affected further since the Navy has already contracted for long-lead time materials, but with the first Columbia expected to be ordered in 2021, the service is facing the reality that it lacks a clear idea of the future of the Virginia program when it is preparing to launch Columbia. The delays center on the integration of the Virginia payload module and just how many the Navy intends to buy. Until this year, the public plan was for Virginia Block V to be a 10-ship class, where the first boat would integrate the acoustic upgrades but the follow-on boats would all integrate the VPM, which is designed to triple the Virginia's Tomahawk payload capacity to 40 per hull. When the Pentagon's 2020 budget request dropped in March, the plan changed, with the total buy expanded to 11 hulls with eight VPM boats. But according to sources who spoke to Defense News, the builder was laying the groundwork for the original plan, which the Navy had already purchased long-lead material toward. The confusion over just how many VPMs the Navy intends to buy has been a major sticking point in the negotiations, with sources telling Defense News that the number of VPMs could still end up as either eight or seven, or potentially even fewer. Complicating matters further is that Congress has yet to weigh in on the fate of the 11th Block V boat, which would mean buying three Virginia's in one year, and some on Capitol Hill have voiced skepticism that the industrial base can support that The Navy's top acquisition official, Assistant Secretary of the Navy for Research, Acquisition and Development James Geurts, is working toward a solution that will balance the needs of the Navy and the needs of the builders, his spokesman said. Geurts "continues to work closely with the program team and industry on negotiating a Block V Multi-Year procurement contract that will be affordable, executable and supports the industrial base,” said Capt. Danny Hernandez. “He wants to ensure we are maximizing the use of taxpayer dollars while at the same time striving for an acceptable level of design and program risk. “Additionally, during this period, the Navy is continuing to fund the shipbuilder for long lead time materials and pre-construction efforts to ensure submarine work continues at the shipyards and with the supplier base.” ‘Worst of Both Worlds' With uncertainty looming about the future of the Virginia class, questions remain about whether that will bleed into Columbia, creating schedule risk that Navy leaders have said for years was untenable. Congress has sought to ease the strain on the supplier base by offering money to help smaller vendors expand to meet demand. And in March, Geurts announced that he was standing up a new program executive officer for Columbia, citing the need to be proactive with any problems that might arise from the competing demands on the industrial base. “These yards are integrated,” defense analyst Dan Goure, a former Bush Administration official who now works for The Lexington Institute, said in an April interview. “When you start messing with the other program on a short-notice basis, you risk the yards being able to deliver on time and at cost for multiple programs. “In a sense you risk the worst of both worlds: You risk further perturbations in the Virginia class, and at the same time risk not being able to get Columbia out on time.” Both General Dynamics and Huntington Ingalls said in earnings calls they expect the Block V contract to be signed by the end of the year. Delays The setbacks seem to be compounding for the Virginia program. Welding issues on missile tubes destined for the Virginia Payload Module and the Columbia-class ballistic missile submarine program have eaten into the schedule margin for both programs. And issues with the supplier base as well as the labor force have caused schedule delays. Industry sources who spoke to Defense News said growing the Virginia-class program from one submarine per year to two submarines per year, which started with the budget in FY11, has put increasing strain on a diminished submarine supplier base, which has put pressure on schedules as the shipyards wait for parts. Huntington Ingalls has dropped 23 percent of its profit margin on the Virginia-class program, according to a second-quarter earnings report analyzed by defense business analyst Jim McAleese. In an earnings call, Huntington Ingalls executives seemed to blame the drop on the schedule delays. Two sources familiar with the issue said profit loss stemmed from labor force issues that resulted from a year-long delay in the Navy contracting for the carrier George Washington's mid-life refueling and overhaul. The delay caused Ingalls to lay off about 1,200 employees, which drew off workforce from the Virginia program because of labor union rules that say that the most recent hires must be laid off first. Those rules forced Huntington Ingalls Industries to lay off workers who were working on the Virginia program, who in turn were then snapped up by other yards; Huntington Ingalls Industries then had to train new employees for the Virginia work. Defense News reported in March that class-wide, Virginia is looking at four-to-seven month delays for delivery, which drives up labor costs. Huntington Ingalls Industries chief financial officer Chris Kastner said on the call that getting the Virginia program back on schedule is a top priority. “Especially when you're a in a serial production line like we are with the Virginia-class,” Kastner said. “If you start to have issues with schedule it does start to affect the synchronization of the line. “We've been working pretty hard to reset that this year, given kind of where we started last year fourth quarter and we made great progress on that." https://www.defensenews.com/naval/2019/08/16/questions-about-us-navy-attack-sub-program-linger-as-contract-negotiations-drag/

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  7 février 2019 | International, Sécurité, Autre défense

  DARPA: Intelligent Healing for Complex Wounds

  Blast injuries, burns, and other wounds experienced by warfighters often catastrophically damage their bones, skin, and nerves, resulting in months to years of recovery for the most severe injuries and often returning imperfect results. This long and limited healing process means prolonged pain and hardship for the patient, and a drop in readiness for the military. However, DARPA believes that recent advances in biosensors, actuators, and artificial intelligence could be extended and integrated to dramatically improve tissue regeneration. To achieve this, the new Bioelectronics for Tissue Regeneration (BETR) program asks researchers to develop bioelectronics that closely track the progress of the wound and then stimulate healing processes in real time to optimize tissue repair and regeneration. Paul Sheehan, the BETR program manager, described his vision for the technology as “not just personalized medicine, but dynamic, adaptive, and precise human therapies” that adjust to the wound state moment by moment to provide greater resilience to wounded warfighters. “Wounds are living environments and the conditions change quickly as cells and tissues communicate and attempt to repair,” Sheehan said. “An ideal treatment would sense, process, and respond to these changes in the wound state and intervene to correct and speed recovery. For example, we anticipate interventions that modulate immune response, recruit necessary cell types to the wound, or direct how stem cells differentiate to expedite healing.” The envisioned BETR technology would represent a sharp break from traditional wound treatments, and even from other emerging technologies to facilitate recovery, most of which are passive in nature. Under current medical practice, physicians provide the conditions and time for the body to either heal itself when tissues have regenerative capacity or to accept and heal around direct transplants. Most people are familiar with interventions that include casts to stabilize broken bones or transplants of healthy ligaments or organs from donors to replace tissues that do not regenerate. Passive approaches often result in slow healing, incomplete healing with scarring, or, in some unfortunate cases, no healing at all. Blast injuries in particular seem to scramble the healing processes; 23 percent of them will not fully close. Moreover, research shows that in nearly two thirds of military trauma cases — a rate far higher than with civilian trauma injuries — these patients suffer abnormal bone growth in their soft tissue due to a condition known as heterotopic ossification, a painful experience that can greatly limit future mobility. Although recent experimental treatments offer some hope for expedited recovery, many of these new approaches remain static in nature. For instance, some “smart” bandages emit a continuous weak electric field or locally deliver drugs. Alternatively, hydrogel scaffolds laced with a drug can recruit stem cells, while decellularized tissue re-seeded with donor cells from the patient help avoid rejection by the host's immune system. These newer approaches may indeed encourage growth of otherwise non-regenerative tissue, but because they do not adapt to the changing state of a wound, their impact is limited. “To understand the importance of adaptive treatments that respond to the wound state, consider the case of antibiotic ointments,” Sheehan explained. “People use antibiotics to treat simple cuts, and they help if the wound is infected. However, completely wiping out the natural microbiota can impair healing. Thus, without feedback, antibiotics can become counterproductive.” Recent technologies have begun to close the loop between sensing and intervention, looking for signs of infection such as changes in pH level or temperature to trigger treatment. To date, however, these systems have been limited to monitoring changes induced by bacteria. For BETR, DARPA intends to use any available signal, be it optical, biochemical, bioelectronic, or mechanical, to directly monitor the body's physiological processes and then to stimulate them to bring them under control, thereby speeding healing or avoiding scarring or other forms of abnormal healing. By the conclusion of the four-year BETR program, DARPA expects researchers to demonstrate a closed-loop, adaptive system that includes sensors to assess wound state and track the body's complex responses to interventions; biological actuators that transmit appropriate biochemical and biophysical signals precisely over space and time to influence healing; and adaptive learning approaches to process data, build models, and determine interventions. To succeed, the BETR system must yield faster healing of recalcitrant wounds, superior scar-free healing, and/or the ability to redirect abnormally healing wounds toward a more salutary pathway. DARPA anticipates that successful teams will include expertise in bioelectronics, artificial intelligence, biosensors, tissue engineering, and cellular regeneration. Further, DARPA encourages proposals that address healing following osseointegration surgery, which is often necessary to support the use of advanced prosthetics by wounded warfighters. DARPA will host a Proposers Day on March 1, 2019 in Arlington, Virginia, to provide more information to researchers interested in submitting a proposal for funding. Additional information is available at https://go.usa.gov/xENCQ. A forthcoming Broad Agency Announcement, to be posted to the Federal Business Opportunities website, will include full details of the program. https://www.darpa.mil/news-events/2019-02-06a

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  15 février 2020 | International, Aérospatial

  Singapore Airshow 2020: IAI takes aim at Singapore's next-gen UAV requirement with Heron MKII

  Israel Aerospace Industries (IAI) has taken the opportunity at Singapore Airshow 2020 to showcase its Heron MKII medium altitude long endurance unmanned aerial vehicle (MALE UAV) to the public for the first time, and has declared its intention to pitch the new air vehicle at a Singaporean requirement for next-generation UAVs. Moshe Levy, IAI's executive vice president and general manager of its Military Aircraft Group, told Jane's that the Heron MKII builds on the experience gained from developing the incumbent Heron 1 UAV and will offer improved performance via several airframe design and propulsion updates, although its general physical characteristics remain unchanged with an overall length and wingspan of 8.5 m and 16.6 m, respectively. Newly incorporated enhancements include a widened fuselage pod designed to accommodate a greater number of sensors and/or more powerful mission systems as well as a new propulsion configuration comprising the fully certified Rotax 915 iS 1,352 cc turbocharged four-stroke engine, which has a time before overhaul (TBO) rating of 1,200 hours. It also produces up to 135 hp at maximum continuous power and is coupled to a three-bladed variable-pitch pusher propeller. IAI claims that the new engine will provide the Heron MKII with a 50% improvement on the rate of climb over that of the Heron 1, as well as a 16.6% boost over the current maximum speed of 120 kt to 140 kt, although it retains a comparable loiter speed profile of between 60 and 80 kt. The new air vehicle's maximum take-off weight (MTOW) has also increased to 1,350 kg with a corresponding uptick in payload capacity to 470 kg. In contrast, the Heron 1 has a MTOW of about 1,200 kg and is powered by a 1,211 cc four-stroke Rotax 914 F engine that can develop up to 100 hp at maximum continuous power, which in turn drives a two-bladed pusher propeller. https://www.janes.com/article/94282/singapore-airshow-2020-iai-takes-aim-at-singapore-s-next-gen-uav-requirement-with-heron-mkii?from_rss=1