Model Variants (Including Prototypes)
YOH-6A - Prototype Designation
OH-6A - Initial Production Model Designation; fitted with 1 x Allison T63-A5A turboshaft engine.
OH-6A NOTAR - Experimental Platform; sans tail rotor system.
OH-6B - Fitted with 1 x Allison T63-A-720 turboshaft engine.
OH-6C - Proposed Variant; fitting 1 x Allison 25-C20 turboshaft engine; five-bladed main rotor.
OH-6J - Japanese Ground Self-Defense Force Version; license-production by Kawasaki Heavy Industries; based on OH-6A production model.
OH-6D - Japanese Ground Self-Defense Force Version; license-production by Kawasaki Heavy Industries; based on Hughes 500D production model.
EH-6B - Electronic Warfare Aircraft (EWA) Platform foruse by special forces; airborne command post.
MH-6B - Special Forces Variant
TH-6B - US Navy Variant; based on the MD-369H.
AH-6C - Attack Platform; based on the OH-6A production model; provision for outboard weapons on wingstub fittings.
MH-6C - Special Forces Variant