Excalibur (projectile)

Excalibur (projectile)
source
Name	Excalibur
Caption	An Excalibur precision-guided artillery shell.
Type	GPS-guided extended-range artillery projectile
Origin	United States
Used by	See Operators
Designer	Raytheon
Design date	1990s–2000s
Manufacturer	Raytheon
Production date	2007–present
Variants	See Variants
Weight	~48 kg (106 lb)
Length	~0.9 m (3 ft)
Diameter	155 mm
Cartridge	155 mm howitzer shell
Velocity	~827 m/s (2,713 ft/s)
Range	Up to 70 km (43 mi)
Guidance	GPS/INS
Accuracy	<10 m (33 ft) CEP
Filling	High-explosive
Filling weight	~22 kg (48 lb)

Excalibur (projectile) is a family of GPS-guided, extended-range artillery projectiles developed by Raytheon for the United States Army and the United States Marine Corps. Designed to be fired from standard 155 mm howitzers, such as the M777 howitzer and the M109A6 Paladin, it provides U.S. and allied forces with highly accurate, first-round fire-for-effect capability against point targets in all weather conditions, significantly reducing collateral damage compared to conventional unguided artillery.

Overview

The Excalibur (projectile) program was initiated to address a critical need for precision in indirect fire support, particularly following experiences in the War in Afghanistan and the Iraq War. It represents a major leap in field artillery technology, transitioning from area saturation weapons to a system capable of engaging specific targets like buildings or vehicles with near surgical precision. Its deployment has fundamentally altered modern artillery tactics, allowing supported maneuver units to operate closer to friendly fires and enabling effects in complex urban environments previously deemed too risky.

Development

Development began in the 1990s under a U.S. Army program, with Raytheon selected as the prime contractor. The project faced significant technical challenges and cost overruns during its engineering and manufacturing development phase, leading to a major Nunn–McCurdy breach in 2005. Following a program restructuring, the first successful guided test flight occurred at Yuma Proving Ground in 2005. Initial operational capability was declared in 2007 after accelerated testing and fielding to support urgent operational needs from U.S. Central Command for the conflicts in Iraq and Afghanistan.

Design and capabilities

The projectile uses a GPS-aided inertial navigation system (INS) for guidance. After being fired, its canard control fins deploy, allowing it to glide and maneuver to its programmed coordinates. The high-explosive warhead is designed with a precision point-detonating fuse for optimal effect. Key capabilities include a published maximum range of approximately 70 kilometers when fired from a M777A2, an accuracy of less than 10 meters Circular Error Probable (CEP), and a reduced logistical footprint as fewer rounds are needed to destroy a target. Later variants incorporated a dual-mode seeker for engaging moving targets.

Operational history

The Excalibur (projectile) was first used in combat in 2007 in Iraq, fired from an M109A6 Paladin by soldiers from the 1st Cavalry Division. It saw extensive use in Afghanistan, notably during the Battle of Marjah and operations in Helmand Province, where its precision was crucial for supporting ISAF and Afghan National Army troops in populated areas. It has also been employed by the Ukrainian Armed Forces against Russian forces following the 2022 Russian invasion of Ukraine, where its accuracy has been used to strike high-value targets like command posts and ammunition depots.

Variants

* Excalibur Ib: The initial production variant with GPS/INS guidance and a unitary high-explosive warhead. * Excalibur Ia-2: An enhanced variant with improved reliability, a more insensitive munition warhead, and reduced cost. * Excalibur S: A variant with a semi-active laser seeker added to the GPS/INS guidance, enabling engagement of moving targets. Also known as the "Precision Guidance Kit (PGK)" for artillery. * Excalibur N5: A version developed for the 5-inch (127 mm) naval gun mounted on U.S. Navy destroyers and littoral combat ships.

Operators

* : Primary operator used by the United States Army and United States Marine Corps. * : Acquired for use by the Australian Army. * : Used by the Canadian Army with its M777 howitzers. * : In service with the Royal Netherlands Army. * : Operated by the Swedish Army. * : Provided by the U.S. Department of Defense as part of military aid following the 2022 Russian invasion of Ukraine. Category:Precision-guided munitions Category:155 mm artillery Category:Artillery shells and shot Category:Military equipment introduced in the 2000s