Repeating crossbow

A repeating crossbow is a specialized mechanical weapon designed for a high rate of fire.

Unlike a standard crossbow, which might only fire two bolts per minute, this device can launch 7 to 10 bolts in just 15 to 20 seconds. This rapid fire makes it unique among ancient projectile weapons. While it was used throughout much of Chinese history, it was often viewed as a non-military tool. It was frequently used by women or timid men to defend homes against robbers.

Large, stationary versions were also built for use in naval battles or as siege weaponry.

The most common design comes from the Ming dynasty. This version features a top-mounted magazine that holds a reservoir of bolts. Gravity pulls these bolts down to feed them into the firing position. The user holds a tiller, which is the main body or stock of the weapon, firmly against their hip. By pushing and pulling a rectangular lever back and forth, the user performs several tasks at once. This single motion spans the bow, places a new bolt, and shoots the weapon.

A sliding lug nut at the back of the magazine manages the drawstring. As the lever is pulled, the nut pushes the string upward to propel the loaded bolt.

Earlier versions of the weapon functioned through a much more complex mechanism. During the Warring States period, the state of Chu used a design with a pistol-style grip. This model featured a double magazine mounted on top of the tiller. Instead of an overhand lever, it used a sliding lever with a handle tied to a cord. The user pumped this lever with one hand while holding the pistol grip with the other. Inside, a metal trigger shaped like a crab's claw arm controlled the release.

This trigger used friction and tensional forces to lock the drawstring in place during the drawing process.

History provides specific details about the origins of this invention. The *Wu-Yue Chunqiu*, a history written during the Eastern Han dynasty, credits a Mr. Qin from the State of Chu with the invention. This claim is supported by archaeology. Excavations at Tomb 47 in Qinjiazui, Hubei Province, uncovered repeating crossbows dating to the 4th century BC. This period is known as the Warring States period.

Many people mistakenly associate the weapon with the strategist Zhuge Liang from the Three Kingdoms era. However, records suggest he only provided improvements to existing multiple-bolt crossbows rather than inventing the concept.

Different cultures developed their own unique variations of the technology. The Korean Joseon Dynasty created versions that were quite different from the Chinese models. These Korean designs mounted the magazine at the end of a long stalk. They also used a pivoting recurve bow as a prod, which is the part of the bow that bends. This modification increased the draw strength, range, and overall performance.

Some variations in both China and Korea were even capable of firing two or three bolts at once. Other models were designed to fire small pellets instead of traditional bolts.

Despite its impressive speed, the repeating crossbow had significant limitations in power. The bolts used were relatively small and light compared to those used in standard crossbows. This meant the weapon lacked the accuracy and strength needed to penetrate heavy armor. Because of this, it was rarely used as a primary military weapon against armored troops. To compensate for this lack of force, users often smeared poison, such as aconite, onto the bolts. This ensured that even a small wound could become fatal to a target.

Ultimately, the repeating crossbow represents a fascinating chapter in mechanical history. It was one of the longest-lived mechanical weapons because its basic construction remained stable for centuries. It served various roles, from tiger hunting to defending fortified houses. While it was eventually superseded by more powerful designs, its ability to provide rapid fire was a significant technological achievement. It connects the study of ancient Chinese engineering to the broader history of global military technology.