Multiple rocket launcher

Some machines shoot many rockets at once.

They can shoot them very fast. This helps them hit a big area.

These tools are very old. Long ago, people in China used small rockets. They used bamboo to make them.

Later, people in Korea used carts. These carts held many rocket arrows. They could shoot many arrows at once.

In big wars, many countries used these machines. Some used big trucks to carry them. This helped them move fast.

Today, rockets use space tools to fly. This helps them hit the right spot. It is a very smart way to use rockets.

A multiple rocket launcher (MRL) is a system that shoots many rockets at once.

Instead of shooting one shell at a time, these machines launch a volley. This helps them hit a large area very quickly.

These tools have a long history. In the 12th century, people in China used fire arrows.

Later, Korea used a machine called a hwacha.

It used a cart with many holes to fire rocket arrows.

During World War II, many countries built new types. The Soviet Union used the BM-13 Katyusha. It used a rack of rails on the back of a truck. This design helped modern launchers move easily.

Today, MRLs use smart technology. Some use GPS, which is a satellite tool for finding places. This helps rockets hit a very specific spot. Other rockets use fins to steer. This makes them much more accurate than old rockets.

A multiple rocket launcher, or MRL, is a special type of artillery system.

Instead of firing one shell at a time, it uses many launchers on one platform. This allows it to shoot a volley of rockets very quickly. These rockets are self-propelled, meaning they move through the air on their own power. They can carry much larger payloads than standard guns. They also have a longer effective range. By firing many rockets in a short time, they can cover a huge target area. This is often called saturation fire.

There are two main ways these systems work. The first type uses fixed steel tubes or pipes. These pipes stay on the launcher, and soldiers load the rockets by hand or with machines. This is a very common way for them to work. The second type uses removable containers or pods. These pods can be swapped out very quickly. This allows a crew to use different types of rockets in different situations. It also makes it easier to upgrade the system with new technology. Factories or special workshops usually prepare these modules.

People have been using rocket launchers for a very long time. The first ones were called Huo Che in medieval China. As early as 1180, Chinese soldiers used fire lances on pikes. By the Song dynasty, they could fire 100 small fire-arrow rockets at once. These arrows had bamboo shafts and could fly 300 to 400 paces.

Later, the Joseon dynasty in Korea built the hwacha. This was a two-wheeled cart with 100 to 200 holes for rockets. In 1592, 40 hwachas helped repel 30,000 soldiers during the Battle of Haengju. These early tools showed how powerful many rockets could be.

During World War II, many famous systems were created. The Soviet BM-13 Katyusha was a very famous self-propelled launcher. It used a rack of rails mounted on a truck. This design became the template for most modern launchers.

The Americans also made the T34 Calliope, which put launchers on Sherman tanks. Germany used the Nebelwerfer, which was a towed six-tube system. Some German versions were even mounted on vehicles called halftracks. These different designs helped armies move their rockets across the battlefield.

Modern technology has changed how these rockets fly. Older rockets were not very accurate, but new ones use GPS. GPS is a satellite system that helps find exact locations. Some rockets also use inertial navigation or laser seekers to stay on course.

This makes them much more precise. Instead of hitting a large area, they can hit a spot just a few meters wide. Some rockets even use small fins or air brakes to steer. This allows them to correct their path while they are in the air. These smart tools make long-range rockets much more useful than they used to be.

A multiple rocket launcher (MRL) is a specialized type of rocket artillery system.

These systems feature multiple launchers fixed to a single platform. This design allows them to fire rocket ordnance in a manner similar to a volley gun. Unlike conventional artillery, which uses shells pushed by expanding gases from a gun barrel, MRL rockets are self-propelled during flight. This means the rocket carries its own engine and fuel to move through the air. Because of this, MRLs often have a longer effective range and lower recoil than traditional guns. They can also carry a higher payload, which is the weight of the explosive or equipment a rocket carries.

Historically, unguided rockets were known to be inaccurate and slow to reload. To solve this, MRLs use the ability to launch many rockets in rapid succession. This creates saturation fire, which is the delivery of many projectiles over a single target area to ensure impact.

Modern technology has changed this by adding guidance systems. Many contemporary rockets use GPS, or Global Positioning System, to find their exact location. Others use inertial navigation systems, which track movement and direction without needing outside signals. These technologies allow rockets to combine high speed with the precision of guided munitions.

There are two primary mechanical designs for these launchers. The first type uses fixed tubes or pipes, usually made of steel. These tubes are non-removable from the launcher itself. Soldiers reload these systems manually or through semi-automatic processes on the battlefield. This was the most common design until the 21st century. The second type uses removable containers, pods, or modules. These pods can be quickly swapped for different types of rockets or different calibers. This modularity allows commanders to adapt to tactical situations more easily. These containers are typically prepared in factories or specialized army workshops before being deployed.

The history of rocket launchers began in medieval China during the Song dynasty. These early versions were known as Huo Che. As early as 1180, the Chinese used fire lances fixed to pikes to shoot at enemies.

Later, Chinese militaries developed launchers that could fire up to 100 small fire-arrow rockets at once. These rockets had bamboo shafts between 1.5 and 2.5 feet long. The powder section of these arrows was roughly 10 to 15 centimeters long. Their striking distance was estimated at 300 to 400 paces. The Chinese also made these launchers mobile and sometimes mounted them on wheelbarrows.

In Korea, the Joseon dynasty developed an expanded variant called the hwacha.

This system used a two-wheeled cart containing 100 to 200 holes for rocket arrows. The hwacha had an estimated range of 2,000 meters. This weapon was used effectively during the Japanese invasions between 1592 and 1598. Most notably, at the Battle of Haengju, 40 hwachas were used to repel 30,000 Japanese soldiers. This shows how even small numbers of rocket systems can impact large numbers of troops.

During World War II, the first famous self-propelled MRLs appeared. The Soviet BM-13 Katyusha was one of the most well-known.

It featured a rack of launch rails mounted on the back of a truck. This design set the template for modern MRLs. The United States created the T34 Calliope by mounting tubular launchers on M4 Sherman tanks.

Germany also produced various systems, such as the Nebelwerfer. Some German versions were mounted on halftracks, like the Panzerwerfer 42 4/1. One German system, the 8 cm Raketen-Vielfachwerfer, was so similar to the Soviet BM-13 that it was nicknamed the "Himmler-Organ."

Modern MRLs face specific challenges in certain environments. For example, they struggle to engage reverse slope positions in mountain warfare. This is because it is harder to determine the correct trajectory compared to a howitzer. Additionally, simple rockets have a long minimum firing range. To fix this, some rockets use drag rings on the nose to slow them down and create a less flat flight path. Advanced systems use tracking radar to monitor weather balloons or special rockets. This data helps crews understand how wind and temperature affect the flight path. Some rockets even use air brakes or steering fins to correct their course mid-flight. This precision reduces the dispersion, or the spread of where rockets land, from hundreds of meters to just a few meters.