Originally fielded in the Vietnam War, the CH-47 has undergone a series up upgrades ... which remains the U.S. Army standard and features composite rotor blades, an improved electrical system ...

The CH-47 Block II Chinook is an extended-range version ... The Block II version of the Chinook featured new rotor blades, but the Army abandoned the effort in 2022 due to excessive rotor blade ...

The US Army wants 465 CH-47 Chinook Block IIs ... and new fiberglass blades to add 4,000 pounds of payload capacity. There ...