Too large to be manportable, it was typically deployed from specialised vehicles or helicopters. The missile was intended to supplement traditional anti-tank weapons, like the 100 mm anti-tank gun whose accuracy beyond 1,500 m is poor. The missile's accuracy in contrast remained high as far as its maximum range of 2,000 m.
The 3M6 Shmel was based on the western ATGMs of the time, such as the Nord Aviation SS.10; however, it is considerably larger. It was developed by the Special Mortar Design Bureau (SKB Gladkostvolnoi Artillery) in Kolomna, who were also responsible for the AT-3 Sagger.
Development of the missile proceeded rapidly, with the first unguided flights in April 1958 followed by controlled flights in June and July 1958. On 28 August 1959, the new technology was shown to the command of armed forces. On 1 August 1960, it was accepted into the service. It was first publicly displayed in 1963.
There were two ground-based platforms for the missile
While a few were used by Egyptian forces during the 1967 Six-Day War and from 1969 in the War of Attrition, only one tank loss was attributed to the system. The system's hit probability is estimated to have been 25% in combat.
The system was also used by the Cypriot National Guard during the 1974 Turkish Invasion of Cyprus in a man-portable version. Several dozen shots were fired in action during a number of July and August engagements in the conflict, with low effectiveness.
North Korea began producing a reverse-engineered version of the missile in 1975.
The missile is guided to the target by means of a joystick, which requires some skill on the part of the operator. The operator's adjustments are transmitted to the missile via a thin wire that trails behind the missile.
The missile is steered by an unconventional arrangement of vibrating spoilers.
As stated before, MCLOS requires considerable skill on the part of the operator. The system's effectiveness in combat drove the development of missiles based on the easier to use SACLOS system.
One problem with the missile is the amount of time it takes to reach maximum range—around 20 seconds—giving the intended target time to take action, either by retreating behind an obstacle, laying down a smoke screen or firing on the operator. Also, the large size of the missile means that only a few rounds can be carried; the BRDM-1 vehicle can only carry three missiles.
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