8 octobre 2020 | International, Terrestre, C4ISR

Army Seeks Electric Scout By 2025

The Light Reconnaissance Vehicle, an off-road truck to scout ahead of airborne and light infantry units, could lead the Army's move to electric motors. But electrifying heavy cargo trucks, let alone tanks, could take decades.

WASHINGTON: The Army will brief interested companies Oct. 20 on an electric-drive version of the long-delayed Light Reconnaissance Vehicle and the service's emerging strategy to convert its gas-guzzling formations to electric power.

The service is working with a non-profit consortium of more than 200 companies and universities developing clean transportation technologies, CALSTART. But the driving logic here is pure Army green, not eco-friendliness. Tactically, electric vehicles accelerate quicker, run cooler, and move quieter than internal combustion ones – advantages that are all especially valuable for stealthy scouts like LRV. They can also run power-hungry high-tech systems, from sensors to lasers, without needing a bulky auxiliary power unit.

Logistically, even if the Army has to recharge its electric vehicles from diesel generators, that would actually get more miles per gallon than putting the same fuel directly into an internal combustion vehicle, because electric motors are much more efficient. So electric power could reduce dependence on long supply lines and vulnerable convoys of tanker trucks, which are prime targets for adversaries ranging from Taliban irregulars to Russian missiles. Army and NATO wargames have shown some alarming vulnerabilities in the fuel supply.

What's the timeline? “We'd like to see an Electric Light Reconnaissance Vehicle by FY25,” said Maj. Ryan Ressler, who's leading the effort for Army Futures Command. But electrifying the Army's whole fleet of wheeled vehicles – let alone its heavier tracked vehicles – may take decades, starting with light trucks and gradually working up to heavy armor.

“You're not going to go straight to an all-electric [fleet]. The battery density is not there for your combat vehicles,” Ressler told me – at least, not yet.

“We would like to see all electric vehicles by 2040,” he said. “There might be potential to have all electric vehicles in the near term, if industry can help.” The Oct. 20 industry day will be the first step toward finding out.

From Light to Heavy

Ressler hopes to have a formal Abbreviated Capabilities Development Document (ACDD) for ELRV approved “in a matter of months,” he told me. “We see this as the first electrified vehicle for the Army ground combat fleet.”

Industry feedback on ELRV – and progress on development, if the program goes ahead – will then inform the long-term strategy for Tactical and Combat Vehicle Electrification across the wider fleet. Ressler's team is now drafting what's called an Initial Capabilities Document for TaCVE.

To test those concepts out in practice, he added, “we're looking at other potential candidates for electrification right now.” High on that list is the Infantry Squad Vehicle (ISV) being built by GM Defense, an air-droppable light truck designed to carry airborne troops from their drop sites to the objective. Electric vehicles' innate stealth and reduced dependence on fuel supply would be particularly valuable to paratroopers, who operate on the ragged end of long supply lines.

There's already been work done on an electric Infantry Squad Vehicle. “An electric prototype representative of the ISV proved it could be whisper-quiet, achieve sprint speed immediately, and offered excess power for extended silent watch mode exceeding current objectives,” according to an Army Futures Command white paper.

LRV and ISV are natural partners. The Light Reconnaissance Vehicle was intended to scout ahead of the vulnerable Infantry Squad Vehicles, helping the unarmored transports avoid a lethal ambush. But the Army decided to delay a purpose-built LRV and use the heavier Joint Light Tactical Vehicle (JLTV) as a stopgap scout. So it looks like LRV may have a second chance at life.

ISV and LRV are both ultralight vehicles, meant to support airborne troops and other light infantry units that can deploy rapidly by air but after that mostly maneuver on foot. But even light infantry brigades have a small fleet of heavy trucks to carry supplies and special equipment. Mechanized units have a host of armored vehicles – 8×8 wheeled Strykers for medium brigades; tracked tanks, howitzers, missile launchers, and troop carriers for heavy brigades – followed by an even larger number of trucks to carry fuel, spare parts, supplies, and other support. There's already been some progress with these heavier vehicles.

BAE Systems is developing an experimental hybrid diesel-electric engine for the M2 Bradley troop carrier. BAE's experimented with hybrid-electric armored vehicles for decades, company exec Andrew Rosenfeld told me – they once built a hybrid as heavy as an M1 Abrams tank – but the company's recent boom in civilian hybrid-electric buses has advanced the state of the art. Their engine for the Bradley can move up to 45 tons, and the same basic design could scale larger or smaller to go in a wide range of other vehicles. The hybrid Bradley uses 10 to 20 percent less fuel during a normal mission, he told me, and it can generate 500 kilowatts of power, enough to run an Army field hospital.

On the wheeled side, the Army's Ground Vehicle Systems Center (GVSC, formerly TARDEC) converted an Oshkosh cargo truck, the four-axle M977 HEMTT, to hybrid electric drive for a 2019 demonstration. That Tactical Vehicle Electrification Kit cut the HEMTT's fuel consumption by 15-25 percent, according to the Army Futures Command white paper. TVEK also tripled the truck's capacity to generate power.

Increased power generation not only allows an electrified vehicle to have more technology on board, like sensors and weapons. Such vehicles could also park, plug in, and power up soldiers' charging kits, field hospitals, command posts, or radar sites – potentially replacing traditional diesel generators.

“The very concept of what constitutes a vehicle has changed,” the white paper argued. “Electrification has transformed vehicles into sensor platforms, communication nodes, and mobile computational hubs.”

Just as the F-35 fighter is so full of electronics that a former Air Force Chief of Staff called it “a computer that happens to fly,” electrified ground vehicles could become computers that happen to drive – and not just computers, but mobile charging stations as well. Today's complex and vulnerable supply chain must move large amounts of fuel from refinery to tanker to forward depot to individual vehicles and generators. A future system could be much more decentralized, supplying smaller amounts of fuel to hybrid-electric vehicles, which could then generate power to share with all-electric ones.

Such streamlined logistics could make a life-or-death difference in wartime. The Army's concept for future combat, Multi-Domain Operations, calls for individual brigades to operate up to seven days without stopping for resupply. That's unimaginable today. Improving fuel-efficiency of internal combustion engines would make for only “marginal” progress towards the goal, the white paper argued. Truly self-sufficient combat units will require largescale replacement of fossil fuel with electricity, potentially drawn from small, mobile nuclear reactors.

“It's fundamental to Multi-Domain Operations,” argued retired Lt. Gen. Eric Wesley, who commissioned the white paper when he was Futures & Concepts Center chief for Army Futures Command. He just took on a private-sector job with Flyer Defense, a maker of lightweight off-road trucks that's now developing an electric-drive vehicle with a small, built-in diesel generator to recharge itself. (This isn't a hybrid-electric drive, since the diesel doesn't' drive the wheels; it just charges the batteries).

“Moving energy on the battlefield is the biggest challenge commanders will have in the future,” Wesley told me. But if you electrify your vehicle, he argued, it can “become more than just a combat vehicle: It becomes an energy node [in] a distribution network, where every vehicle is part of your energy distribution plan.”

Such a decentralized and flexible system, he argues, is much harder for a Russian missile strike to take out than a fuel depot.

https://breakingdefense.com/2020/10/army-seeks-electric-scout-by-2025/

Sur le même sujet

  • The US military’s logistical train is slowly snaking toward China

    9 mai 2019 | International, Aérospatial, Naval

    The US military’s logistical train is slowly snaking toward China

    By: Kyle Rempfer A failed Venezuela coup, Iranian missiles and Russian hybrid warfare make for interesting side stories, but the center of military policy is increasingly gravitating toward U.S. Indo-Pacific Command, according to U.S. government officials. If anything, the challenge is how to quicken the pace because the logistical tail of warfare takes time to put in place and because the Pacific theater is one of the most difficult environments for moving supplies. “If there's a challenge, it's moving enough focus and enough direction from everything else we're doing towards the Pacific," said Joel Szabat, the assistant secretary for international affairs within the Department of Transportation. Szabat, whose department deals with U.S. military logistics in wartime, said the center of gravity has shifted so much toward the Asia-Pacific region that even a major crisis on par with 9/11 won't derail the change. “I don't see, in the near term at least, things that would have us pull back,” Szabat said. But he warned that new lines of effort must be implemented if that shift is to be sustainable during a war with the region's biggest player — China. The baggage train challenge The Department of Transportation is the coordinating arm for civilian airlift and sealift capacity in peacetime and wartime. But the sealift fleet is old and in need of recapitalization. The size of the fleet is also too small to support the long logistical train required in a Pacific-based conflict, and the ships that do exist are poorly positioned across the operating area and would lack armed escorts in the event of a conflict, according to Szabat. “For small or moderate-scale warfare exercises, it's adequate," Szabat said. “For the maximum deployment that our military is built for ... it is not adequate to move and sustain. We don't have the mariners. We don't have the U.S. flagged Merchant Marine that we need for that purpose.” The Marine Corps represents a large component of the military force that would need to be delivered in the event of a war. “There are 40,000 Marines at any one time that are moving around the world, and 23,000 of those are west of the international date line, so they're in the Pacific,” said Gayle Von Eckartsberg, policy director at Headquarters Marine Corps' Pacific Division. “And then you have your Marines in Hawaii, and that brings that number to over 30,000. And the rest are distributed across other places in the world.” "The Marine Corps' natural environment is the Asia-Pacific region, and I think we're uniquely capable of operating effectively [there],” she added. The Corps is posturing to act as the inside force of the region, as it practices littoral operations in contested environments and expeditionary base operations from deep in the Pacific. “We're today engaged in aggressive war gaming, training and exercises to test out and refine these concepts,” Von Eckartsberg said. “We're going to hug the enemy and we're going to be there first, operate at this level below armed conflict.” But there remains an “enduring gap in lift capability," Von Eckartsberg acknowledged. No armed escorts The Department of Transportation's Maritime Administration is responsible for managing much of the Navy's sealift capability that would be responsible for delivering Marines, soldiers, sailors, airmen and their equipment into a war. If there was a conflict with China, Szabat said, there is a high degree of confidence that the Navy, with the use of pre-positioned vessels, will be able to move the initial salvo of personnel and equipment quickly into the area of operations. “But sustaining a battle means getting supplies and getting the remainder of your forces from [the continental United States] to wherever the battle is,” Szabat said, adding that the fleet for this isn't currently in place. After the initial war push, 90 percent of logistics would move via civilian vessels and aircraft, according to Szabat. Those civilian assets will need armed escorts at sea, but the Navy has no dedicated escort vessels for the Merchant Marine fleet, he added. “I used to serve in the European theater. That was a challenge. But crossing the Pacific is four times as difficult in terms of logistics and supplies," Szabat said. “We are not able to move our logistics according to war plans unless we have cooperation from our allies.” That presents a unique challenge altogether. The biggest change to U.S. policy in the region has been an increased reliance on allies to accomplish missions and long-term goals, and one would assume that the goal is for them to pick up some of the logistical burden. “But by statute, and national security presidential directive, we are supposed to be able to provide sealift with U.S. ships and U.S. mariners without relying on allies," Szabat said. "We can't do that unless we have the escorts.” However, allies and partnerships still play an important role. China's growth is followed closely by that of U.S. ally India. U.S. Pacific Command understands the power dynamics between India and China, which is part of why it renamed itself U.S. Indo-Pacific Command last year, according to Deputy Assistant Secretary Walter Douglas, who leads the U.S. State Department's Bureau of East Asian and Pacific Affairs. “Bringing the countries of South Asia in is absolutely crucial to what we do,” he said. “India is very much a partner in everything that we do and is central in the Indo-Pacific as we move forward." Allies, while unable to provide sealift under current war plans, remain crucial to U.S. efforts to counter China. The U.S. is helping train naval forces for countries like Vietnam; promising to defend the territorial integrity of countries like Japan and the Philippines; performing freedom of navigation patrols through contested waterways; and courting new allies like the small Pacific island nations in Oceania. “I expect that to continue," Douglas said. "I never want to promise resources until they're delivered, but I think the indications are pretty good that we're going to be doing more.” https://www.militarytimes.com/news/your-military/2019/05/08/the-us-militarys-logistical-train-is-slowly-snaking-toward-china

  • German government ups the pressure in $1.1B Poseidon purchase petition

    23 juin 2021 | International, Aérospatial

    German government ups the pressure in $1.1B Poseidon purchase petition

    As is the case with other large military investments awaiting a decision, the aircraft acquisition would exceed current budget projections here.

  • With Glue, Japan Uses Composite For Fighter Substructure

    21 novembre 2018 | International, Aérospatial

    With Glue, Japan Uses Composite For Fighter Substructure

    TOKYO—Japanese engineers, working on replacing fasteners with glue, are applying composite to combat-aircraft substructure as well as the ... http://aviationweek.com/defense/glue-japan-uses-composite-fighter-substructure

Toutes les nouvelles