The Piasecki H-21 Shawnee
"the flying banana"

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General Info

Piasecki H-21 Workhorse/Shawnee

Role Military transport helicopter
National origin United States
Manufacturer Piasecki Helicopter
First flight 11 April 1952 Retired 1967
Status Retired
Primary users United States Air Force United States Army French Army Aviation
Produced 1952–1959
Developed from HRP Rescuer

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History Piasecki
Piasecki H-21 Workhorse/Shawnee

The Piasecki H-21 Workhorse/Shawnee is an American helicopter, the fourth of a line of tandem rotor helicopters designed and built by Piasecki Helicopter (later Boeing Vertol). Commonly called "the flying banana", it was a multi-mission helicopter, using wheels, skis and floats.

Piasecki Helicopter designed and successfully sold to the United States Navy a series of tandem rotor helicopters, starting with the HRP-1 of 1944. The HRP-1 was nicknamed the "flying banana" because of the upward angle of the aft fuselage, which ensured that the large rotors could not strike the fuselage in any flight attitude. The name was later applied to other Piasecki helicopters of similar design, including the H-21.

In 1959 Vertol Aircraft, the new name for Piasecki Helicopters, came up with a concept for heavy lift over short distances where between two and six H-21Bs would be linked by beams to lift heavy loads. It was considered to be unsafe, because if one helicopter had mechanical problems during the lift it could unbalance the structure and cause all helicopters to crash.Wiki Link

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Piasecki H-21 Workhorse/Shawnee

Piasecki helicopters

Piasecki H-21 Workhorse/Shawnee

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General characteristics

• Crew: 3–5 (Pilot, co-pilot, crew chief and one or two gunners in Vietnam)
• Capacity: ** 20 troops or
  • 12 stretchers
• Length: 52 ft 6 in (16.00 m)
• Height: 15 ft 9 in (4.80 m)
• Empty weight: 8,950 lb (4,060 kg)

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Powerplant

• Gross weight:  (6,895 kg)
• Powerplant: 1 × Wright R-1820-103 Cyclone 9-cylinder air-cooled radial piston engine, 1,425 hp (1,063 kW)
• Main rotor diameter:  (13.41 m)
• Main rotor area: 3,041 sq ft (282.5 m²) Blade section: - NACA 0012

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Specifications

• Maximum speed:  (204 km/h, 
• Cruise speed:  (158 km/h, 85 kn)
• Range: 265 mi (426 km, 230 nmi)
• Service ceiling: 9,450 ft (2,880 m)
• Disk loading: 5 lb/sq ft (24 kg/m²)
• Power/mass: 0.09 hp/lb (0.15 kW/kg)

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Related development

• Related development

  • Piasecki HRP Rescuer
  • Piasecki H-25
  • Boeing Vertol CH-46 Sea Knight
  • Boeing CH-47 Chinook

Special Links Piasecki H-21 Workhorse/Shawnee

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The Piasecki H-21 Workhorse/Shawnee is an American helicopter, the fourth of a line of tandem rotor helicopters designed and built by Piasecki Helicopter (later Boeing Vertol)

Piasecki H-21
"the flying Banana"

The H-21C saw extensive service with the U.S. Army, primarily for use in transporting troops and supplies. On 24 August 1954, 

Youtube Link

The Piasecki H-21 "Flying Banana" Is the Most Unique and Bizarre Helicopter Still Flying!

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