Hughes OH-6 Cayuse
scout helicopter family
The Hughes OH-6 Cayuse is a single-engine light helicopter designed and produced by the American aerospace company Hughes Helicopters. Its formal name is derived from the Cayuse people, while its "Loach" nickname is derived from the Light Observation Helicopter (LOH) program, under which it was procured.
The OH-6 was developed to meet United States Army Technical Specification 153, issued in 1960 to replace its Bell H-13 Sioux fleet. The Model 369 submitted by Hughes competed against two other finalists, Fairchild-Hiller and Bell, for a production contract. On February 27, 1963, the first prototype conducted its maiden flight. The Model 369 had a distinctive teardrop-shaped fuselage that was crashworthy and provided excellent external visibility. Its four-bladed full-articulated main rotor made it particularly agile, and it was suitable for personnel transport, escort and attack missions, and observation. During May 1965, the U.S. Army awarded a production contract to Hughes.
During 1966, the OH-6 began service with the U.S. Army, and promptly entered active combat in the Vietnam War. In theater, it was commonly operated in teams with rotorcraft such as the Bell AH-1 Cobra attack helicopter, using so-called "hunter-killer" tactics to flush out and eliminate hostile ground targets.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jul 5, 2026. The linked authority identifier is Q1050858. The Library of Congress control number is sh89003181. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1960, 1963, 1965 and 1966.
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This entry incorporates text from “Hughes OH-6 Cayuse” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.