Major Components

The Dragon weapon system consists of a daysight, a nightsight, and a round of ammunition.

a. Daysight. The daysight is an electro-optical sight that determines the position of the missile relative to the gunner's line of sight (LOS).

(1) The daysight generates signals that travel by wire to the missile control system. The missile control system fires the appropriate rocket thrusters to keep the missile heading along the gunner's LOS (Figure 1-1).

Figure 1-1. Daysight line of sight.

(2) The daysight attaches to and removes quickly from the round (Figure 1-2, page 1-2). The daysight's aluminum housing assembly contains the lens, infrared receiver assembly, and control signal comparator. The firing mechanism, located on the right side of the daysight's housing, consists of a trigger safety plunger and trigger lever bar. A rubber boot seals out moisture from the firing mechanism and safety plunger.

(3) A connector cover provides both mechanical and moisture protection for the electrical connector. A lanyard attaches the cover to the daysight.

(4) Shock absorbers surround the forward and rear ends of the daysight to protect it and its lens. The lens cover is attached to the daysight by a lanyard.

M47 Dragon Optic
Figure 1-2. Daysight parts.

(5) The daysight's lens is a 6-power telescope. It magnifies the image across a 6-degree field of view (FOV) to help the gunner locate, identify, and track targets. A fitted and molded rubber eye guard protects the gunner's eyes and allows him to adjust rapidly to the sight (Figure 1-3). The infrared receiver consists of an objective lens assembly, graded filter, infrared detector, and nutator mirror. The sensor detects the missile's infrared output while discriminating against background signals. It detects any deviations or excursions of the missile from the gunner's LOS.

Army Infrared Receiver
Figure 1-3. Daysight lens and rubber eye guard.

(6) The daysight's telescopic lens and infrared receiver align to define the LOS to the target. The tapered cross hair helps the gunner concentrate on the center of his FOV. Then, he can quickly place the cross hairs on the target's center of mass. He uses the stadia lines to determine the range to the target (Figure 1-4). For example, the stadia lines show how large a standard 3-meter by 6-meter Soviet-built vehicle would appear at the Dragon's maximum engagement range of 1,000 meters.

b. Nightsight. At dusk, or anytime the light level drops below what is needed to use the daysight, Dragon gunners switch to the nightsight (Figure 1-5). It attaches to the round the same as the daysight.

cross hairs

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