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The following article was published in our article directory on June 14, 2012.
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Cartridege Actuated Devices (CADs) for Aerospace Applications

Article Category: Computers and Technology

Author Name: Ashok Hamarian

Cartridge Actuated Devices, or CADs for short, are small, self-contained energy sources used to carry out mechanical work. A propellant or pyrotechnic chemical is employed as the source of energy to push off a piston or trigger mechanical motion within the cartridge. Guns typically are not thought of as cartridge actuated devices even though they fit this definition.

Cartridge Actuated Devices are utilized in both the private sector and military services. In the military, they are utilized for deep diving submersible and submarines, as propulsion units for field mine markers, as a means of separating missile stages, as inflation systems for location of buoys, and as soft recovery systems for re-entry vehicles from space.

An important use of CADs in the private sector is to inflate the airbags in vehicles. The aerial flare kits carried by many maritime boats and pleasure cruises are also related devices.

Cartridge actuated devices are of two principal types. One is a cartridge that responds immediatelyto stimulus and the alternative is a cartridge that gives a delayed reaction. Cartridges that behave instantaneously to stimuli are called impulse cartridges, and are mostly utilized in release applications such as pushing off bombs or missiles clear of aircraft.

Benefits of Cartridge Actuated Devices

As a means of propulsion system or source of energy, CADs carry several benefits. First, they're small and lightweight, and demand almost no maintenance once installed. CADs are simultaneously economical and reliable. Malfunction rarely happens and their reliability in a wide variety of situations is proven. CADs are quite versatile and may be applied in several applications in addition to military use.

Examples of CADs

Other examples of CAD products are cutters, explosive bolts, frangible nuts, parachutes, pin pullers, piston actuators, separator systems, and wing actuators. Other CAD products include explosive squibs, pyrotechnic valves, pressure cartridges, cable cutters, puncture devices, explosive bolts, thrusters, pneumatic actuation systems, underwater devices and oilfield products; igniters, initiators, delays, detonators, and primers.

CADs also permit initiation through many sources such as thru initiation energy, initiating mechanism, mechanical, firing pin, ballistic hot gas, pneumatic hose, high and low electrical voltage, electrical cable, explosive, explosive cord, lasers, and fiber optics.

Practical uses of CADs

CADs are used in a wide variety of private sector applications such as airbags, parachutes, propulsion systems for a variety of vehicles, and driving system for of construction tools. While CADs have a lot of uses in the private sector, especially in the energy and construction sector, CADs are primarily used and noted for as a device in military equipment and weapons. Aircraft and missile systems are the main items that use cartridge actuated devices. Submarines and submersibles rely heavily on CADs to deploy their missile load or separate their submersibles from each other. However, not only being a weapon, CADs should be seen simply as a tool for propulsion and mechanical movement.Cads change energy from propellant into mechanical movement.

Keywords: mini-pyrotechnic products, CADs, PADs, cartridge actuated devices, propulsion actuated devices

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