CUTAWAY: Ultimate Survivor - OH-58 enters fifth decade stronger than ever By Stephen Trimble Scout helicopters have a torturous legacy in the US Army acquisition system. Three attempts to buy a light observation helicopter - the Hughes OH-6 Cayuse in 1967, the Sikorsky/Boeing RAH-66 Comanche in 2004 and finally the Bell Helicopter ARH-70 Arapaho in 2008 - have failed, with billions of dollars wasted in the process. The Bell OH-58 Kiowa is the only aircraft to survive the gauntlet. In the 37-year interval between the cancellations of the Cayuse and Comanche, the army fielded four major versions of the basic...