FIM-92 Stinger

The FIM-92 Stinger is a personal portable infrared homing surface-to-air missile developed in the United States and entered into service in 1981. Used by the militaries of the U.S. and by 29 other countries, the basic Stinger missile has to-date been responsible for 270 confirmed aircraft kills.[1] It is manufactured by Raytheon Missile Systems and under license by EADS in Germany, with 70,000 missiles produced. It is classified as a Man-Portable Air-Defense

Light to carry and relatively easy to operate, the FIM-92 Stinger is a passive surface-to-air missile, shoulder-fired by a single operator, although officially it requires two. The FIM-92B can attack aircraft at a range of up to 15,700 feet (4,800 m) and at altitudes between 600 and 12,500 feet (180 and 3,800 m). The missile can also be fired from the M-1097 Avenger vehicle and the M6 Linebacker, an air defense variant of the M2 Bradley IFV. The missile is also capable of being deployed from HMMWV Stinger rack, and can be used by airborne paratroopers. A helicopter launched version exists called the ATAS or Air-to-Air Stinger.

The missile is 1.52 m long and 70 mm in diameter with 10 cm fins. The missile itself weighs 10.1 kg, while the missile with launcher weighs approximately 15.2 kg (33.5 pounds). The Stinger is launched by a small ejection motor that pushes it a safe distance from the operator before engaging the main solid-fuel two-stage motor which accelerates it to a maximum speed of Mach 2.2 (750 m/s). The warhead is a 3 kg penetrating hit-to-kill warhead type with an impact fuze and a self-destruct timer.

In order to fire the missile, a BCU (Battery Coolant Unit) must be inserted into the handguard. This shoots a stream of argon gas into the system, as well as a chemical energy charge that enables the acquisition indicators and missile to get power. The batteries are somewhat sensitive to abuse, and only hold so much gas in them. Over time, and without proper maintenance, they are known to become unserviceable. The IFF antenna receives its power from a rechargeable battery. Guidance to the target is initially through proportional navigation and is then switched to another mode that directs the missile towards the target airframe instead of its exhaust plume.

There are three main variants in use; the Stinger basic, STINGER-Passive Optical Seeker Technique (POST), and STINGER-Reprogrammable Microprocessor (RMP).
The Stinger-RMP is so-called because of its ability to load a new set of software via a ROM inserted in the gripstock at the depot. If this download to the missile fails during power-up, basic functionality runs off the on-board ROM. The four-processor RMP has 4K of RAM for each processor; since the downloaded code runs from RAM, there isn't much space to spare, particularly for the processors dedicated to seeker input processing and target analysis. The RMP has a dual-detector seeker: IR and UV. This allows it to distinguish targets from countermeasures much better than the Redeye, which was IR-only.