Piasecki HUP Retriever - Photos & Videos

Piasecki HUP Retriever
Krajiny	Spojené štáty americké
Úlohu	Úžitkový vrtuľník
Prvý let	Marec 1948
Postavený	339

Komisia Piasecki H-25 Army Mule/HUP Retriever bol kompaktný jedno radiálny motor, dvojitý prekrývajúci sa tandemový rotorový úžitkový vrtuľník vyvinutý spoločnosťou Piasecki Helicopter Corporation v Mortone v Pensylvánii koncom 40-tych rokov a vyrobený začiatkom 50-tych rokov. Spoločnosť zmenila svoj názov v roku 1956 na Vertol Aircraft Corporation a následne ju kúpila spoločnosť Boeing Aircraft Company v roku 1960 a stala sa Boeing-Vertol.

Zdrojový: Piasecki HUP retriever na Wikipédii

Piasecki HUP-3 (H-25A) Retriever chodiť
Fotograf	Vladimír Jakubov
Lokalizácia	Múzeum vzduchu a vesmíru Pima, Tuscon
Fotografie	27

Piasecki HUP-3 Retriever 01

Piasecki HUP-3 Retriever 02

Piasecki HUP-3 Retriever 03

Piasecki HUP-3 Retriever 04

Piasecki HUP-3 Retriever 05

Piasecki HUP-3 Retriever 07

Piasecki HUP-3 Retriever 06

Piasecki HUP-3 Retriever 08

Piasecki HUP-3 Retriever 09

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Piasecki HUP-2 Walk Around
Fotograf	Neznáme
Lokalizácia	Neznáme
Fotografie	32

Piasecki HUP-2

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The Compact Tandem Workhorse

Komisia Piasecki HUP-3 Retriever (known in the Army as the H-25 Army Mule) was a compact tandem-rotor helicopter designed specifically for the tight confines of aircraft carrier decks. By placing the rotors in a tandem configuration—one at the front and one at the rear—Piasecki eliminated the need for a tail rotor, which allowed the aircraft to be shorter and more stable in crosswinds. The HUP-3 was the refined version of the series, primarily serving in search and rescue (SAR) and utility roles during the early 1950s.

Attribute	Technical Specification (HUP-3)
Úlohu	Search and Rescue (SAR) / Utility Helicopter
Crew / Capacity	2 Pilots / 4-5 Passengers or 3 Litters
First Flight (HUP series)	Marec 1948
Pohonná jednotka	1 × Continental R-975-46A radial engine
Horsepower	550 hp (410 kW)
Maximálna rýchlosť	105 mph (169 km/h)
Rotor Diameter	35 ft 0 in (10.67 m) each
Length (Rotors turning)	56 ft 11 in (17.35 m)

Engineering Innovations and Tandem Flight

Overlapping Rotors: To keep the fuselage as short as possible for carrier elevators, the front and rear rotors were designed to overlap. They were synchronized via a drive shaft to ensure the blades never collided.
No Tail Rotor Advantage: Because the two rotors counter-rotated, they cancelled out each other’s torque. This meant all engine power went toward lift and thrust, making the HUP series very efficient for its size and exceptionally stable during hovering.
The Rescue Hatch: The HUP-3 featured a large rectangular hatch in the floor of the cabin. A rescue hoist was mounted directly above it, allowing the crew to lift a person straight up into the center of the aircraft while in a hover.
Canted Vertical Fins: Early models lacked the large vertical fins seen on the HUP-3. These “end plates” on the rear pylon were added to improve directional stability during high-speed forward flight.

Service History and Variants

Carrier Plane Guard: Before the HUP, destroyers often followed carriers to pick up downed pilots. The HUP-3 allowed the helicopter to act as the “Plane Guard,” hovering near the carrier during flight ops to provide immediate rescue capability.
Army “Mule”: The Army version, the H-25A Army Mule, featured power-boosted controls and a reinforced floor for cargo. However, the Army found the tandem design less suited for field operations than the Navy did for sea duty.
All-Metal Blades: The HUP-3 was among the first to benefit from all-metal rotor blades, which were far more durable in the humid, salty conditions of naval service than earlier wooden or fabric-covered versions.
Preservation: Several HUP Retrievers are preserved in museums today, including the Národné múzeum námorného letectva in Pensacola and the Pima Air & Space Museum in Arizona.