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Extended Range Cannon Artillery

TomS

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I think it's the other way around. The initial application for ERCA was for Paladin; the new initiative is seeing if they can adapt the same tube to the M777 instead.
 

John21

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Here's another article on it, and yeah it sounds like their sticking with the current armament for the Paladin.
http://www.army.mil/article/164462/
 

JFC Fuller

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The article describes part of the effort as seeing it the gun can be a "cross-platform" solution and it will apparently be demonstrated in an M109 which suggests it could theoretically replace the current M109 gun if a requirement arose.

there is also curious reference to an autoloader being developed under the ERCA program....?
 

sferrin

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John21 said:
Here's another article on it, and yeah it sounds like their sticking with the current armament for the Paladin.
http://www.army.mil/article/164462/
Figures. Talk about long-in-tooth.
 

TomS

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M109A7 is interesting. It has kind of sneaked by under the radar, but it seems to be basically a new SP howitzer based on Bradley running gear that has some parts in common with the old M109. Compared to the A6 Paladin, the A7 has an entirely new hull, a new suspension (with fewer road wheels even), a new engine (again from Bradley), new electric turret drives, an electric loading system with a semi-auto rammer, etc.

https://www.ausa.org/publications/armymagazine/archive/2014/Documents/07July14/SoldierArmed_July2014.pdf

About the only things in common with the A6 seem to be the turret shell and the actual gun tube. And it ERCA works out, that may go away as well. See slide 10 here:

http://www.dtic.mil/ndia/2014munitions/Pelino.pdf
 

Forest Green

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The XM1113 RAP uses rocket technology to deliver greater thrust to the round, when compared to its predecessor, the legacy M549A1. This will enable current U.S. Field Artillery 155mm Systems to fire the XM1113 RAP to a range of 40 kilometers, a 30% increase from the M549A1. When fired from the planned future Extended Range Artillery Cannon (ERCA), the XM1113 will achieve ranges out to 70 kilometers. The XM1113 RAP round aligns with the U.S. Army’s modernization initiative under the Long Range Precision Fires (LRPF) Cross-Functional Team.
 

AN/AWW-14(V)

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Long Range PGK

General Dynamics XM1113-LRPGK CroppedLong Range Precision Guidance Kit (LR PGK): The Long Range Precision Guidance Kit is a course correcting fuze that provides near precision accuracy for current and future 155mm High Explosive projectiles. The LR PGK uses state of the art technologies to develop a next generation guidance kit that operates in GPS contested environments. This system greatly decreases collateral damage and provides a sophisticated approach to defeating threats on the modern battlefield. LR PGK is compatible with the XM1113 Rocket Assisted Projectile and future long-range artillery systems to meet LRPF Indirect Fire program objectives.

 
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Forest Green

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Wonder how it does that then? Very accurate gyro used over short ranges I guess.
 

TomS

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Wonder how it does that then? Very accurate gyro used over short ranges I guess.
Pretty much all "GPS-guided" weapons use the GPS to update an inertial navigation system. And "operates in GPS contested environments" doesn't mean not using GPS, it means having improved jamming rejection and better INS for when GPS is really denied.
 
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