Sikorsky R-4

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Sikorsky R-4
Sikorsky R-4 of the Fleet Air Arm.
Role Helicopter
National origin USA
Manufacturer Sikorsky.
First flight 1942
Introduction 1943
Status Out of order
Primary user United States Army Air Force
Number built 131 examples.

The Sikorsky R-4 is the first military helicopter built in USA. It flown during World War II and beginning of Korea War. Some were used by US Navy, US Coast Guard and Fleet Air Arm.