Model Variants (Including Prototypes)
Vertol Model 114 - Model Selected by US Army for futher battlefield development.
YCH-47A - Prototype Designation
CH-47A - Initial Production Model Designation; 354 produced for US Army.
CH-47B - Uprated engines with increased rotor diameter; 108 such models produced.
CH-47C - Uprated engines and increased fuel capacity; became US Army "standardized" Chinook for previous "B" models; also produced under license in Italy with Elicotteri Meridionali brand.
CH-47D - Fitted with T55-L-712 engines featuring more overall power; new external cargo hook design implemented; NVG cockpit capability; over 480 such models produced.
CH-47D "International Chinook" - Export Model Designation.
CH-47F (ICH) "Improved Cargo Helicopter" - US Army Transport Model.
CH-47J - Japanese license-production of CH-47D models.
CH-47JA - Japanese license-production of CH-47D models with weather radar equipped.
MH-47D - Special Operations modified CH-47C models.
MH-47E - Special Operations Model
CH-47SD "Super D" - Export Model
HC.1 - British CH-47C Model Designation
HC.2 - British CH-47D Model Designation