CM-21 Armored Vehicle
The CM-21 is a domestic production armored vehicle modified by the Republic of China Tank Development Research Center based on the American M113 armored personnel carrier. From the factory of the first prototype in 1979 to the official service in 1982, the CM-21 has developed a complete vehicle. Department, a total of more than 1,000 vehicles have been produced. At the end of 1967, the U.S. Army and the Republic of China signed a "Third-Country Refurbishment Plan" to begin refurbishing U.S. military equipment in the Vietnam War until the end of the Vietnam War, thus accumulating complete experience in the refurbishment, welding, spare parts manufacturing, full vehicle assembly, and testing of the M113 armored vehicle.
By 1975, Joint Logistics had implemented the "Wancheng Plan" and welded three M113 bodies with aluminum alloy armor plates produced by Taiwan Aluminum Corporation. Wancheng No. 1 was an M106 4.2-inch mortar car imitating the M113 car series, but The mortar was changed to a national-made 63-type 120mm mortar. The concept of this vehicle was inherited from the CM22A1 120mm mortar vehicle. Wancheng No. 2 car transplants the M24 tank turret to the imitation M113 car body, and moves the engine compartment to the rear of the car body. It is an M113-style light tank configuration. Wancheng No. 3 car is a multi-rocket launcher by adding a worker bee-4 multiple rocket launcher to the imitation M113 car body. After that, six other US-made M113s were also transformed into a multiple rocket launcher in the same way. (There is also the Wancheng No. 4 car that has been converted from M48A1 to M48A5. Wancheng plans to have these four vehicles in total.) The Wancheng plan laid a solid foundation for the design, production and development of CM21.
The basic type of the CM-21 is an armored personnel carrier. The whole vehicle is made of fully welded aluminum alloy. It uses the same type of transmission system as the M113A1. It can carry a total of 12 soldiers. The front and rear sides of the vehicle and the sides of the body are double-layered hollow space armor. The interior is filled with polyurethane foaming chemicals to absorb the penetration force of bullets or artillery pieces, and the armor can withstand 5.56 rifle shells. On the whole, the CM-21 has better protection than the M113, but it is also slightly heavier by several hundred kilograms than the M113, and its mobility is slightly lower than that of the M113.
There are two perforations on both sides of the CM-21, and one perforation is directly behind. Therefore, the rear infantry compartment is carried in a back-to-back manner in the center of the vehicle, and the front half of the infantry compartment is seated on the body in a face-to-face manner. CM-21 has the ability to float, and can float 1.5 meters deep without additional reinforcement. Before launching, opeartors need to start two pumps, open the front flap, and the water is still propelled by the crawler, and there are no extra blades. Like the M113, the CM-21 can be equipped with external fuel tanks on both sides of the rear. The basic firepower of the CM-21 is a 12.7mm Browning M2 heavy machine gun or a 40mm Mk 19 automatic grenade launcher , and a quadruple smoke grenade launcher on each side. However, double guns have also been used. The CM-21 is equipped with Browning M2 heavy machine gun and 40mm Mk 19 automatic grenade launcher at the same time.
China received the M113A1 armored personnel transport vehicle from the United States in 1991. The M113A1 armored personnel carrier is an all-aluminum armored, floatable, air transportable and multi-purpose personnel carrier developed by General Dynamics in the Republic of China in 1945. The 75M8V water-cooled gasoline engine originally used by the U.S. military in 1949 It was replaced with a 6V53 water-cooled diesel engine to increase the cruising mileage. It was named M113A1 with a cruising mileage of 483 kilometers. The equipment was widely adopted by countries all over the world. It participated in the Vietnam War and the Israeli-Arab Middle East War. There were many derivative models. After the Clouded Leopard wheeled armored vehicle was replaced in recent years, the first batch of M113A1s received were eliminated one after another.
In the 1990s, there had been cooperation with French GIAT to develop integrated weapons and equipment, equipped with the then advanced 25mm cannon as the main turret, and also used the gun shield to provide personnel safety protection, but the backward thinking of the military did not allow the CM-21 series armored vehicles have been further improved, so that they continue to be "usable" in the Army and Marine Corps. Looking around the world, there are also many armored vehicles that continue to use the American M113 series, but there are also many improvements. Not only the protection is strengthened, but the motorization speed is also increasing. Taiwan does not lack technology but only lacks ideas and determination for even basic military armaments.
When the Mazu Nangan garrison brigade carried out the CM-21 armored personnel carrier driving training 18 March 2021, a CM-21 overturned directly in front of the slope due to mechanical problems of the vehicle. The crew of 5 officers and soldiers rushed to hospital, but with no serious medical problems, returned to the camp to rest. However, the Ministry Defense initially denied that the car overturned, but only after a witness provided photos of the scene did it confess that it was a vehicle overturned, and emphasized that the Ministry of Defense had formed a special team to investigate.
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