These days, most helicopters seem to follow similar design trends. However, over the years, different experimental designs have gotten pretty strange.

For over 60 years, the CH-47 Chinook has been the backbone ... With its twin-rotor design and unmatched heavy-lift capability, this helicopter has proven its worth in conflicts from Vietnam ...

The CH-47 is the U.S. Army’s only ... to bring them in on Chinooks, which could lift a lot more and fly at high altitude far better than any other helicopter. One of the greatest challenges ...

The Boeing Aircraft Company will pay $54 million to the U.S. government to settle two lawsuits which alleged that Boeing sold helicopters to the U.S. Army that were built with "substandard and ...

In-flight refueling can extend the range of the MH-47 helicopter. The CH-47F upgrade program involves ... that improve fuel efficiency and enhance lift performance by approximately 3,900 lbs ...