OH-58 Kiowa

The Bell OH-58 Kiowa is a family of single-engine, single-rotor military helicopters used for observation, utility, and fire support. Developed by Bell Helicopter as the D-250 for the Light Observation Helicopter (LOH) competition, the first prototype flew on 8 December 1962. After losing the initial bid, Bell refined the design into the Model 206A and won a reopened competition in 1967. The type entered U.S. Army service in May 1969. Total production reached 2,325 helicopters, with new airframe production ending in 2000.

Design

Initial variants utilized a two-bladed main rotor, whereas the OH-58D introduced a four-bladed rigid composite rotor. The OH-58D featured a Mast Mounted Sight (MMS) containing a television system, thermal imaging, and a laser range finder/designator. On the OH-58F, this was replaced by a chin-mounted AAS-53 Common Sensor Payload. Avionics upgrades included glass cockpits and 1553 databus integration. Protective features consisted of a passive wire strike protection system, ballistic floor armor, and infrared engine exhaust suppressors.

Armament

Early models lacked weapons, though some OH-58Cs carried two AIM-92 Stinger missiles. The OH-58D Kiowa Warrior introduced weapon pylons on both sides of the fuselage, carrying AGM-114 Hellfire missiles, Stinger missiles, 70 mm Hydra-70 rockets, and .50-caliber M296 or M3P machine guns.

Operational History

The U.S. Army first deployed the OH-58A to Vietnam in August 1969, losing approximately 45 aircraft. The type subsequently saw combat during the invasion of Panama, the Gulf War (deploying 130 OH-58Ds), and operations in Iraq and Afghanistan. The Army retired its last active-duty Kiowa Warriors in 2017 and retired the remaining training OH-58Cs in September 2020. Export operators include Austria, Canada, Croatia, the Dominican Republic, Greece, Saudi Arabia, Taiwan, and Tunisia, with licensed production also occurring in Australia.

Variants

• OH-58A: The initial four-place observation variant featuring a two-bladed rotor and provisions for a 7.62 mm M134 Minigun.
• OH-58C: An upgraded model featuring a more powerful engine, infrared suppression systems, and an AN/APR-39 radar detector.
• OH-58D: An advanced scout variant featuring a four-bladed composite rotor, a Mast-Mounted Sight, and weapon pylons in the Kiowa Warrior configuration.
• OH-58F: An upgraded variant utilizing a chin-mounted AAS-53 Common Sensor Payload and advanced cockpit displays with unmanned aerial vehicle control.
• OH-58F Block II: An experimental performance upgrade variant utilizing a Honeywell HTS900 engine and the rotor systems of the Bell 407.