HUP  RETRIEVER
UH-25C

 La extraña forma de "banana voladora" del HRP-1 fue descartada en el modelo PV-14 del que se encargaron dos prototipos XHJP-1 para evaluación. Este modelo inicial fue desarrollado en el PV-18 que designado HUP-1 por la marina estadounidense, presentaba derivas terminales en las superficies horizontales de cola. Este modelo llevaba un motor Continental R-975-34 de 525 hp. y construidos entre 1949 y 1952. Las satisfactorias evaluaciones del piloto automático Sperry en un XHJP-1 llevaron al desarrollo del HUP-2 al cual se le eliminaron las derivas y se le instaló un motor R-975-46 de 550 hp. Otra versión fue la H-25A Army Mule, propulsada por un motor R-974-46A introducía mandos asistidos, piso reforzado y puertas agrandadas, 50 aparatos similares fueron transferidos a la US Navy bajo la denominación HUP-3.

 After the first "flying banana", Piasecki immediately set to work on a specification, issued by the US Navy Bureau of Aeronautics in 1945, for a shipboard helicopter to be used on aircraft carriers and larger vessels for SAR, liaison, replenishment and plane guard duties.

The result was the PV-14 (designated XHJP-1 by the US Navy). Three pre-production aircraft, the HUP-1, were ordered in 1948; this was followed between 1950 and 1952 by a full production batch using the 525hp Continental R-975-34 radial engine, which could carry two crew plus four-five passengers or three stretcher cases. The power-plant was installed at the center of the fuselage, which had a steel tube framework with particularly strong, fixed tricycle landing gear. The fin of the HUP-1 was subsequently eliminated, as further improved versions were fitted with an autopilot. The US Navy versions had all-weather instrumentation and some were equipped with sonar for antisubmarine warfare.

The HUP-1 kept the classic, tandem rotor configuration, but had a smaller, more compact fuselage than its predecessors. This enabled the helicopter to be stowed without having to fold back the rotor blades. Once acceptance trials were over, the US Navy ordered 32 aircraft, followed by another 165 of the HUP-2, which was fitted with a more powerful engine. The Marines also used 13, while the Army acquired 70, designated H-25A, 50 of which were later transferred to the Navy as HUP-3s. Finally, 15 HUP-2s were built for the French Navy and three for the Canadian Navy. All these helicopters were withdrawn in 1956, but in the period from 1950-53, they received their "baptism of fire" in Korea, where they performed intensive transport, liaison and rescue missions, both on land and at sea. At the height of their career, they were in fact carried aboard all the aircraft carriers of the American fleet for rescue operations.

Datos HUP-3

Characteristics
Características

Information
Información

Characteristics
Características

Information
Información

1949

   1 Radial
Continental
R-975-46A

2 / 5

550 HP

1780 Kg

Ft

2770 Kg

Ft

80 Kts

 10000 Ft

 95 Kts

297 NM