Understanding the British RARDEN Autocannon

Design and Features of the RARDEN Autocannon

Nicholas Moran, a veteran armor officer known as "The Chieftain," highlights the technical ingenuity behind the British RARDEN 30 mm autocannon. Specifically designed for precise targeting, the RARDEN uses 30 mm ammunition that is loaded in three-round clips with a handle for manual handling. These clips are stowed face down within the armored vehicle's interior for easy access during operations. To load, the crew retrieves a clip, places it in the gun, and uses a hand crank to prepare the cannon for firing.

Moran describes the RARDEN as a high-accuracy weapon tailored for specific targets, such as BMP infantry fighting vehicles. A defining feature of the cannon is its sub-minute-of-angle (MOA) precision, an impressive achievement for an automatic cannon. Moran attributes this to the RARDEN's exceptionally well-designed barrel, which features four mounting points equipped with dampeners to minimize vibration and improve accuracy. While the RARDEN's high precision came at the cost of a relatively low rate of fire, it excelled in its intended role of delivering accurate and effective fire against light armor.

However, the lack of stabilization equipment on some platforms limited the cannon's effectiveness in mobile engagements. Moran notes that when mounted on vehicles like the Chieftain battle tank or the Warrior infantry fighting vehicle, the RARDEN required the vehicle to be stationary to maintain its accuracy. This was viewed as a drawback, particularly in comparison to American armored vehicles that prioritized fire-on-the-move capabilities.

U.S. Evaluation of the RARDEN: A Historical Insight

Moran discusses the U.S. Army's evaluation of the RARDEN during its research on future autocannon calibers. As part of the Low Dispersion Automatic Cannon System (LODACS) program, the U.S. sought to document the technological benchmarks of low-dispersion automatic cannons to guide future development, rather than to adopt the RARDEN itself. For this purpose, the British provided a few RARDEN cannons, along with updated barrels with additional mass and rigidity, which were tested on both static rigs and a modified M551 Sheridan light tank.

To assess the cannon's accuracy without the interference of environmental conditions, the RARDEN was sometimes covered with a canvas shroud during testing. This unfortunately resulted in little photographic evidence of the trials. The tests highlighted one of the RARDEN's main shortcomings: its lack of fire-on-the-move capability. This limitation, rooted in its design for stationary firing, made it less suitable for the U.S. Army's operational requirements. Despite this, the RARDEN's accuracy and low-dispersion performance provided valuable data for U.S. studies on future weapons systems.

Operational Uses and Loading Mechanism

The operational characteristics of the RARDEN further reveal its purpose-built design. Moran explains that the cannon's loading mechanism is distinctive, relying on three-round clips loaded manually with the help of a hand crank. Ammunition is placed into a loading ramp, where the handle is stripped off during the process. This method of operation allows the cannon to have six loaded rounds available: two clips worth, after a second round of cranking.

The RARDEN is not designed for sustained fire like some other autocannons. Its firing mechanism allows for a limited rate of fire, delivering up to six rounds per burst before requiring manual reloading. However, Moran points out that it serves its primary role well: delivering high-precision fire against designated targets. As a result, the weapon functioned successfully within its niche role in British armored vehicles, particularly in scenarios that required sharp accuracy against lightly armored threats.

What was said, and when

The points this article makes, and the moment in the recording where each was said. Every time below opens the recording at that moment.

• The British RARDEN 30 mm autocannon was designed for precise targeting. 00:59.
• The RARDEN uses 30 mm ammunition loaded in three-round clips with a handle for manual handling. 00:22.
• RARDEN ammunition clips are stowed face down within the armored vehicle's interior for easy access. 00:22.
• To load the RARDEN, the crew retrieves a clip, places it in the gun, and uses a hand crank to prepare the cannon for firing. 04:33.
• The RARDEN as a high-accuracy weapon tailored for specific targets, such as BMP infantry fighting vehicles. 00:59.
• The RARDEN cannon features sub-minute-of-angle (MOA) precision according to Moran. 01:12.
• Moran attributes the RARDEN's precision to its well-designed barrel with four mounting points equipped with dampeners to minimize vibration and improve accuracy. 01:30.
• The RARDEN's high precision came at the cost of a relatively low rate of fire, says Moran. 01:30.
• The RARDEN lacked stabilization equipment on some platforms, limiting its effectiveness in mobile engagements. 02:13.
• When mounted on vehicles like the Chieftain battle tank or the Warrior infantry fighting vehicle, the RARDEN required the vehicle to be stationary to maintain accuracy, according to Moran. 02:13.
• Stationary firing was seen as a drawback for the RARDEN compared to American vehicles prioritizing fire-on-the-move capabilities. 01:30.
• Moran discusses the U.S. Army's evaluation of the RARDEN during its research on future autocannon calibers. 02:35.
• As part of the Low Dispersion Automatic Cannon System (LODACS) program, the U.S. sought to document low-dispersion automatic cannon benchmarks rather than adopt the RARDEN. 02:48.
• The British provided a few RARDEN cannons with updated barrels of additional mass and rigidity for testing as part of the U.S. LODACS program. 03:49.
• The U.S. tested the RARDEN cannon on static rigs and a modified M551 Sheridan light tank. 03:06.
• The RARDEN was sometimes covered with a canvas shroud during U.S. testing to avoid environmental interference. 03:21.
• Limited photographic evidence exists of the RARDEN trials due to the canvas shroud used. 03:21.
• U.S. testing highlighted the RARDEN's lack of fire-on-the-move capability as a significant limitation. 03:40.
• The RARDEN's stationary firing design made it less suitable for the U.S. Army's operational requirements. 03:40.
• Despite limitations, the RARDEN's accuracy and low-dispersion performance provided useful data for U.S. studies on future weapon systems. 03:06.
• The RARDEN cannon's loading mechanism relies on three-round clips loaded manually using a hand crank. 04:14.
• The RARDEN's handle is stripped off during the loading process. 04:33.
• The RARDEN is capable of having six loaded rounds available using two clips after a second round of cranking, according to Moran. 04:33.
• The RARDEN is not designed for sustained fire, featuring a limited rate of fire and delivering up to six rounds per burst before manual reloading. 04:49.
• The RARDEN's primary role in delivering high-precision fire against designated targets. 00:59.
• The RARDEN functioned effectively within its niche role in British armored vehicles for accuracy against lightly armored threats. 00:59.