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Soon Coming to an Impovrished Iraqi Neighborhood, The XM25

by The New World Order Resistance Friday, Jan. 20, 2006 at 8:48 PM

XM25 Ideal for Urban Combat Environments The XM25 fires a High Explosive (HE), air bursting 25mm round capable of defeating an enemy behind a wall, inside a building or in a foxhole. http://iraqwar.mirror-world.ru/article/77133

Soon Coming to an Im...
xm_25.gif, image/gif, 450x194

The XM25 fires a High Explosive (HE), air bursting 25mm round capable of defeating an enemy behind a wall, inside a building or in a foxhole.

The advanced design allows the operator to program the round so that it flies to the target and detonates at a precise point in the air. It does not require impact to detonate.

The XM25 is ideal for urban combat. It puts precision firepower in the hands of the soldier, allowing them to eliminate threats without causing significant collateral damage.

"The initial field tests are very promising," said LTC Matthew Clarke, U.S. Army project manager, individual weapons.

"A weapon system like the XM25 will prove invaluable to our warfighters. It will be a clear differentiator on the battlefield."

The revolutionary fire control system for the XM25 employs an advanced laser rangefinder that transmits information to the chambered 25mm round.

As the round flies downrange to the target, it precisely measures the distance traveled and detonates at exactly the right moment to deliver maximum effectiveness.

The XM25 increases the warfighter's probability of hit-to-kill performance by up to 500 percent over existing weapons.

It also extends the effective range of the soldier's individual weapon to more than 500 meters.
First XM25 Prototypes Delivered To U.S. Army For Testing

The muftie's and Imams will be outraged and wonder if Allah has deserted themallowing infidels to have such magic
ATK Successfully Demonstrates XM25 Airbursting Weapon System
ATK'S Advanced Weapon Design Gives the Warfighter Unmatched Precision and Lethality
XM25 Ideal for Urban Combat Environments

Minneapolis, June 22, 2005 – Alliant Techsystems (NYSE: ATK) and the U.S. Army’s Project Manager-Soldier Weapons successfully demonstrated the XM25 advanced airbursting weapon system with developmental ammunition at the International Infantry & Joint Services Small Arms Systems Annual Symposium on May 19, 2005.

The target for the first shot was a small window located approximately 170 meters down range. After exiting the chamber, the round flew right through the target and detonated inside the virtual room. The next four shots in the demonstration sequence also successfully engaged targets at ranges approaching 500 meters. The demonstration was the latest in an on-going series of successful field tests for the XM25. It was designed to simulate a realistic urban combat challenge and the XM25 met all test objectives.

When fielded, the XM25 will fire a High Explosive (HE), air bursting 25mm round capable of defeating an enemy behind a wall, inside a building or in a foxhole. The advanced design allows the operator to program the round so that it flies to the target and detonates at a precise point in the air. It does not require impact to detonate.
The revolutionary fire control system for the XM25 employs an advanced laser rangefinder that transmits information to the chambered 25mm round. As the round flies down range to the target, it precisely measures the distance traveled and detonates at exactly the right moment to deliver maximum effectiveness. The XM25 dramatically increases the warfighter’s system performance while extending the effective range of the soldier’s individual weapon to more than 500 meters.

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Just what we need

by Morbid1 Saturday, Jan. 21, 2006 at 2:27 PM

Just what we need to kill those innocents hiding in holes or behind walls... Killing little women and children just got easier...
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Morbid1

by Scorpio Saturday, Jan. 21, 2006 at 3:31 PM

Yeah..... we never shoot at terrorists. We always shoot at women and children because they don't run as fast.

Get over your sappy self and get with reality.
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Funny thing about weapons

by Look closer... Saturday, Jan. 21, 2006 at 5:13 PM

You never know where when and who they can be used against.
I prefer drinking contest or fisticuffs or usually both as it turns out.
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Accuracy?

by johnk Monday, Jan. 23, 2006 at 5:02 AM

>>As the round flies downrange to the target, it precisely measures the distance traveled and detonates at exactly the right moment to deliver maximum effectiveness.

That's fucked up. It's like an electronic fuse. This is like our rifle-sized vesion of the RPG.

If you assume the shell goes 1500 m/s, then that 500m target was 1/3 of a second away. To be effective, assume the shel must detonate within 3 meters of the target. That's being charitable -- the average room isn't much longer than three meters (so the shell has to blow before it hits the far wall).

The computer in the shell has 1/300th of a second to blow up within range. I suppose this is possible with a 1Mhz or faster counter.

Potential risks I forsee are the possiblity that the shells don't blow quite right. Sharpshooters might be inclined to overshoot or undershoot, or simply shoot more, causing collateral damage. Another risk is that a shell detonates after ricocheting into the wrong place. Yet another risk is that the counter circuit breaks, causing the shell to not explode at all, and leaving these small "mines" to be picked up by children. There's also additional risk if there's another window in the room, and the detonation causes the window to shatter..
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Accuracy

by sh(A)ne Tuesday, Feb. 21, 2006 at 3:56 PM

Good points, though I think most (the human & mechanical failure concerns) are true of any weapon of this type.

I'm not a big fan of guns -- at least not those that are designed for offensive purposes (rather than self-defense), but at least it sounds like they're working to make them do what they do more-accurately...because I'm even less of a fan of dead innocents.

sh(A)ne
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all the technical data on the XM25 I could find

by Hex Tuesday, Feb. 21, 2006 at 6:05 PM

all the technical da...
airbursting_rounds.jpg, image/jpeg, 175x262

XM25 burst radius

Technical description: The XM25 integrates ballistics computation in the full-solution Target Acquisition/Fire Control (TA/FC) system. The soldier places the aim point on target and activates the laser rangefinder. The fire control system provides an adjusted aim point. The soldier places the adjusted aim point on target and pulls the trigger. Target information is communicated to the chambered 25mm round. As the round speeds down range, it measures the distance traveled and bursts precisely at the distance preprogrammed


One of the new options with a larger shell is a fuel-air explosive (or "thermobaric") shell for the XM-25. Such a shell would cause greater blast effect in an enclosed space, and actually suck most of the oxygen out of a cave or closed room long enough to make surviving troops at least a bit groggy. In combat, every bit helps.

The 20mm and 25mm "smart shells" use a computer controlled fuze in each shell.


The four modes include "Bursting" (airburst). For this to work, the soldier first finds the target via the weapons sighting system. This includes a laser range finder and the ability to select and adjust the range shown in the sight picture. For an air burst the soldier aims at an enemy position and fires a round. The shell is optimized to spray incapacitating (wounding or killing) fragments in a roughly six meter radius from the exploding round.


The other modes are "PD" (point detonation, where the round explodes on contact), PDD (point detonation delay, where the round detonates immediately after it has gone through a door, window or thin wall) and "Window", which is used for firing at enemy troops in a trench, behind a stone wall or inside a room. The round detonates just beyond the aiming point. For buildings, this would be a window or door frame, cave entrance or the corner of a building (to get enemy troops thought to be around the corner.)



5 different types of ammuntion available: Airburst, Flechete, Thermobaric, PD & DPD, and shaped charge but only one chamber.


the fuse is pre-programmed to explode the warhead at a preset range, which is calculated during the flight by counting the number of the grenade's rotations


The disadvantage of this system is the extreme complexity of the electronic fuses, which results in a high price of a single round of ammunition. The plans stated that one HEAB round must cost about US $25, and it is still to be seen what the actual price of munitions will be. It is interesting that the present design of the HEAB ammunition actually has two small HE warheads at the front and at the rear of the projectile, with the electronic fuse module located between them.



TA/FCS
The target acquisition/fire control system (TA/FCS) is the most expensive and complicated unit of the whole system, since it must combine day and night vision capabilities, laser range-finding unit, ballistic computer, and various interfaces to the grenade launcher and external systems. It is used to find the targets in any light and weather conditions, determine the range to the target, calculate and display the aiming data, so the grenade or bullet can be fired to the desired point of impact, and then supply the data to the grenade launcher, so the range can be preset into the grenade fuse. In the case of damage to the TA/FCS the 20mm grenade launcher still can be used in the direct impact mode, as can the rifle part of the system.
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Interesting

by johnk Wednesday, Feb. 22, 2006 at 2:50 AM

Counting rotations is an interesting way of creating a kind of "clock" that's more durable than something based on a crystal. It seems like the hard part will be to get it spinning fast enough, and accurately enough, to get enough cycles per second to get accurate resolution.

It's a gruesome bit of advanced technology, isn't it?

It's my opinion that humanity would have been better served if the engineers had used their skills to develop a better tortilla steamer, washing machine, or pen that writes upside down.
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good - I've already figured out how to counter it

by Hex Wednesday, Feb. 22, 2006 at 5:59 PM

good - I've already ...
crystal.jpg, image/jpeg, 352x240

I figured the laser beam was modulated and the round had a photodiode in it's base looking back at the gun that launched it - "laser guided munition"

rifling grooves in the barrel would account for the rotation..


I wonder whether the approach I thought of or the rotation detection sensor is cheaper




"quartz inertial sensors use a one piece, micromachined inertial sensing element to measure angular rotational velocity or linear acceleration using a micromachined tuning fork, a few mm long, for which a reference vibration (10-50 kHz) is excited in the plane of the tuning fork with typically a few µm in amplitude. The tines try to return to their original reference plane when the tuning fork, and thereby this plane, is rotated around an axis parallel to the tines. These inertial effects generate a vibration perpendicular to the plane of the tuning fork whose amplitude is proportional to the speed of rotation. Although this amplitude is only a few percent of an atomic radius at the tip of the tines at the resolution limit, it is possible to detect since its frequency and phase are known


so it's a small quartz crystal as used in an electronic watch - tiny & cheap

"(10-50 kHz)" - 32.768 KHz, standard watch crystal..

the photodiode would require more electronics unless the laser simply pulsed at a constant rate but smoke/fog would block the signal plus the operator would have to keep the gun aimed at the target until the round reached it..

the round is programmed before it's fired and is completely on it's own after it leaves the barrel not subject to electronic or laser jamming..

in that case the only defense is to block it's path before it reaches it's intended target

the laser ranging phase could be jammed by another laser aimed at it, the night vision imager blinded likewise...

a detector could be made that would sense the ranging laser then a zenon flash tube (with or without infrared filter) could be triggered to blind the night vision scope

a counter/jamming laser could sweep the horizon to snag the operator's sights no matter what his position requiring no aiming along with repeated flashes from the strobe to keep the night vision blinded as a defense against accurate shot placement - the weapon's primary advantage


the laser sensor would also serve as an early warning that rangefinding was occuring..

lasers have a very narrow and specific spectra - it's easy to pick them out of background noise by using filters in front of the detector..


multible detectors each with a different filter for a specific type of laser all inside a small cigarette sized box as a pocket alarm you could set out in the open, the alarm sound/signal would indicate what type of laser it was

I'd have it send only a few low power very low duty cycle pulses of infrared out it's backside (a small zenon tube would do) which would trigger bigger strobes (slave strobes) with lenses focused in a narrow beam along the horizon as well (saves power, requires no aiming)

I did some tests several years ago and discovered I could detect a strobe going off 3 rooms away just by the reflections off walls/floors - the "signature" is very strong.

A strobe's flash (which can be made invisible to our eyes using infrared filters) travels further than the munition does - it will only be lethal within the room/space it detonates in, while the warning flash can easly be picked up several rooms away using a cheap tiny IR receiver that could be made as small as a pencil eraser (I collect them - they keep getting smaller & cheaper all the time)

I'm not addressing the use of radio because any radio emission can be picked up plus strobe tubes are cheaper - they are used in disposible pocket cameras for example

I developed this as a rangefinder (really just a proximity detector) for car bumper use warning the driver when he get's too close to - ANYTHING, in case he's not paying attention, triggering a small beeper on the dash or sunguard (along with a special brakelight that consists of a row of red LED's which light up more starting at the center depending on how hard you are decelerating to show the driver behind you how fast your stopping/slowing down)

actually built & installed it in my car's rear window..

tested in the streets of Denver in '96

I built a prototype of the infrared strobe proximity detector and tested it but wasn't too pleased with it's performance so I dropped it

The automakers are starting to offer this now usually built into the side-view mirrors using infrared LED's or microwave

I mounted my prototype on my front bumper for testing...


I never use technology to harm people but I like to keep up on the activities of those who do and come up with ways to counter them..

Technology to counter thier technology..
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