Designation: HUP-3

Piasecki HUP-3

Piasecki HUP-3 (UH-25C) Retriever (Army Mule)

A picture of the Piasecki HUP-3 Retriever

The Piasecki HUP series of helicopters was designed for the U.S. Navy as light utility helicopters.  Design work began in 1945 and the first one flew in 1948.  The helicopter uses a single engine to turn both rotors.  The early versions were primarily used for anti-submarine operations while the later HUP-3 was used for search and rescue and as a transport.  Many of the HUP-3 version began their lives as U.S. Army H-25A Army Mules.  After serving with the Army for several years fifty helicopters were transferred to the U.S. Navy and redesignated as HUP-3 Retrievers.  In 1962 the designation was again changed to UH-25C.  The last of them were retired in 1964.

Wingspan 35 ft (each)

Rotor Diameter

Length 56 ft 11 in.


Height 13 ft 2 in.


Weight 5,750 lbs (loaded)


Max. Speed 105 MPH

Maximum Speed

Range 340 miles


Engines One Continental R-975-46A radial engine with 550 horsepower


Crew 2 with 7 passengers



Utility Helicopter Squadron 1 (HU-1), Atsugi Naval Air Facility, Japan, 1961


Serial Number
147595 (51-16608)

Pima Air & Space Museum

Creating unlimited horizons in aerospace education through the preservation and presentation of the history of flight.

Charity EIN: 86-6031135

Copyright ©
Website by CS Design Studios

Contact Info


6000 E Valencia Rd, Tucson, AZ 85756

Operating Hours:
Open 9 AM – 3 PM Daily
Last Admittance at 1:30 PM