Articles

New Army vehicle protection system may instantly destroy enemy fire


Raytheon

The Army is fast-tracking an emerging technology which gives combat vehicles an opportunity identify, track and destroy approaching enemy rocket-propelled grenades in a matter of milliseconds, service officials said.

Called Active Protection Systems, or APS, the technology uses sensors and radar, computer processing, fire control technology and interceptors to find, target and knock down or intercept incoming enemy fire such as RPGs and Anti-Tank Guided Missiles, or ATGMs.

"The Army is looking at a range of domestically produced and allied international solutions from companies participating in the Army's Modular Active Protection Systems (MAPS) program," an Army official told Scout Warrior.

The idea is to arm armored combat vehicles and tactical wheeled vehicles with additional protective technology to secure platforms and soldiers from enemy fire; vehicles slated for use of APS systems are infantry fighting vehicles such as Bradleys along with Stykers, Abrams tanks and even tactical vehicles such as transport trucks and the emerging Humvee replacement, the Joint Light Tactical Vehicle.

"The Army's expedited APS effort is being managed by a coordinated team of Tank Automotive Research, Development & Engineering Center engineers, acquisition professionals, and industry; and is intended to assess current APS state-of-the art by installing and characterizing some existing non-developmental APS systems on Army combat vehicles," the Army official said.

A challenge with the technology is to develop the proper protocol or tactics, techniques and procedures such that soldiers walking in proximity to a vehicle are not vulnerable to shrapnel, debris or fragments from the explosion between an interceptor and approaching enemy fire.

"The expedited activity will inform future decisions and trade-space for the Army's overarching APS strategy which uses the MAPS program to develop a modular capability that can be integrated on any platform," the Army official said.

Rafael's Trophy system, Artis Corporation's Iron Curtain, Israeli Military Industry's Iron Fist, UBT/Rheinmetall's ADS system, and others.

Trophy

DRS Technologies and Israeli-based Rafael Advanced Defense Systems are asking the U.S. Army to consider acquiring their recently combat-tested Trophy Active Protection System, a vehicle-mounted technology engineered to instantly locate and destroy incoming enemy fire.

Using a 360-degree radar, processor and on-board computer, Trophy is designed to locate, track and destroy approaching fire coming from a range of weapons such as Anti-Tank-Guided-Missiles, or ATGMs, or Rocket Propelled Grenades, or RPGs,

The interceptor consists of a series of small, shaped charges attached to a gimbal on top of the vehicle. The small explosives are sent to a precise point in space to intercept and destroy the approaching round, he added.

Radar scans the entire perimeter of the platform out to a known range. When a threat penetrates that range, the system then detects and classifies that threat and tells the on-board computer which determines the optical kill point in space, a DRS official said.

Trophy was recently deployed in combat in Gaza on Israeli Defense Forces' Merkava tanks. A brigade's worth of tanks used Trophy to destroy approaching enemy fire such as RPGs in a high-clutter urban environment, he added.

"Dozens of threats were launched at these platforms, many of which would have been lethal to these vehicles. Trophy engaged those threats and defeated them in all cases with no collateral injury and no danger to the dismounts and no false engagement," the DRS official said.

While the Trophy system was primarily designed to track and destroy approaching enemy fire, it also provides the additional benefit of locating the position of an enemy shooter.

"Trophy will not only knock an RPG out of the sky but it will also calculate the shooter's location. It will enable what we call slew-to-cue. At the same time that the system is defeating the threat that is coming at it, it will enable the main gun or sensor or weapons station to vector with sights to where the threat came from and engage, identify or call in fire. At very least you will get an early warning to enable you to take some kind of action," he explained. "I am no longer on the defensive with Trophy. Israeli commanders will tell you 'I am taking the fight to the enemy.'

The Israelis developed Trophy upon realizing that tanks could not simply be given more armor without greatly minimizing their maneuverability and deployability, DRS officials said.

Trophy APS was selected by the Israel Defense Forces as the Active Protection System designed to protect the Namer heavy infantry fighting vehicle.

Artis Corporation's Iron Curtain

A Virginia-based defense firm known as Artis, developer of the Iron Curtain APS system, uses two independent sensors, radar and optical, along with high-speed computing and counter munitions to detect and intercept approaching fire, according to multiple reports.

Iron Curtain began in 2005 with the Pentagon's research arm known as DARPA; the APS system is engineered to defeat enemy fire at extremely close ranges.

The systems developers and multiple reports – such as an account from Defense Review -- say that Iron Curtain defeats threats inches from their target, which separates the system from many others which intercept threats several meters out. The aim is to engineer a dependable system with minimal risk of collateral damage to dismounted troops or civilians.

The Defense Review report also says that Iron Curtain's sensors can target destroy approaching RPG fire to within one-meter of accuracy.

Iron Curtain's radar was developed by the Mustang Technology Group in Plano, Texas.

"Iron Curtain has already been successfully demonstrated in the field. They installed the system on an up-armored HMMWV (Humvee), and Iron Curtain protected the vehicle against an RPG. Apparently, the countermeasure deflagrates the RPG's warhead without detonating it, leaving the "dudded" RPG fragments to just bounce off the vehicle's side. Iron Curtain is supposed to be low weight and low cost, with a minimal false alarm rate and minimal internal footprint," the Defense Review report states.

Israel's IRON FIST

Israel's IMISystems has also developed an APS system which uses a multi-sensor early warning system with both infrared and radar sensors.

"Electro-optical jammers, Instantaneous smoke screens and, if necessary, an interceptor-based hard kill Active Protection System," IMISystems officials state.

IRON FIST capability demonstrators underwent full end-to-end interception tests, against all threat types, operating on the move and in urban scenarios. These tests included both heavy and lightly armored vehicles.

"In these installations, IRON FIST proved highly effective, with its wide angle protection, minimal weight penalty and modest integration requirements," company officials said.

UBT/Rheinmetall's Active Defense System

German defense firms called Rheinmetall and IBD Deisenroth, Germany, joined forces to develop active vehicle protection systems; Rheinmetall AG owns a 74% share, with the remainder held by IBD Deisenroth GmbH.

Described as a system which operates on the "hard kill" principle, the ADS is engineered for vehicles of every weight class; it purports to defend against light antitank weapons, guided missiles and certain improvised explosive devices (IEDs).

"The sensor system detects an incoming projectile as it draws close to the vehicle, e.g. a shaped charge or antitank missile. Then, in a matter of microseconds, the system activates a protection sector, applying directed pyrotechnic energy to destroy the projectile in the immediate vicinity of the vehicle. Owing to its downward trajectory, ADS minimizes collateral damage in the zone surrounding the vehicle," the company's website states.

History

This pilot shot down an enemy fighter at Pearl Harbor in his pajamas

Comfort is important when doing a hard job. If it's hot on the work site, it's important to stay cool. If it's hazardous, proper protection needs to be worn. And comfort is apparently key when the Japanese sneak attack the Navy. Just ask Lt. Phil Rasmussen, who was one of four pilots who managed to get off the ground to fight the Japanese in the air.

Rasmussen, like many other American GIs in Hawaii that day, was still asleep when the Japanese launched the attack at 0755. The Army Air Forces 2nd Lieutenant was still groggy and in his pajamas when the attacking wave of enemy fighters swarmed Wheeler Field and destroyed many of the Army's aircraft on the ground.

Damaged aircraft on Hickam Field, Hawaii, after the surprise Japanese attack on Pearl Harbor.

There were still a number of outdated Curtiss P-36A Hawk fighters that were relatively untouched by the attack. Lieutenant Rasmussen strapped on a .45 pistol and ran out to the flightline, still in his pajamas, determined to meet the sucker-punching Japanese onslaught.

By the time the attack ended, Wheeler and Hickam Fields were both devastated. Bellows Field also took a lot of damage, its living quarters, mess halls, and chapels strafed by Japanese Zeros. American troops threw back everything they could muster – from anti-aircraft guns to their sidearms. But Rasmussen and a handful of other daring American pilots managed to get in the air, ready to take the fight right back to Japan in the Hawks if they had to. They took off under fire, but were still airborne.

Pearl Harbor pilots Harry Brown, Phil Rasmussen, Ken Taylor, George Welch, and Lewis Sanders.

They made it as far as Kaneohe Bay.

The four brave pilots were led by radio to Kaneohe, where they engaged 11 enemy fighters in a vicious dogfight. Even in his obsolete old fighter, Rasmussen proved that technology is no match for good ol' martial skills and courage under fire. He managed to shoot down one of the 11, but was double-teamed by two attacking Zeros.

Gunfire and 20mm shells shattered his canopy, destroyed his radio, and took out his hydraulic lines and rudder cables. He was forced out of the fighting, escaping into nearby clouds and making his way back to Wheeler Field. When he landed, he did it without brakes, a rudder, or a tailwheel.

There were 500 bullet holes in the P-36A's fuselage.

Skillz.

Lieutenant Rasmussen earned the Silver Star for his boldness and would survive the war, getting his second kill in 1943. He retired from the U.S. Air Force in 1965, but will live on in the Museum of the United States Air Force, forever immortalized as he hops into an outdated aircraft in his pajamas.

(U.S. Air Force photo)

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