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Sikorsky H-34

H-34Sikorsky S-58Sikorsky S-58T
In 1956, seeking a way to use helicopters in a ground-attack role in the Algerian War, the French Air Force and French Army Aviation (Aviation Légère de l'Armée de Terre) experimented with arming the Sikorsky S-55, then being superseded in service by the more capable Piasecki H-21 and Sikorsky H-34 helicopters.
French evaluations on the reported ground fire vulnerabilities of the CH-34 may have influenced the U.S. Army's decision to deploy the CH-21 Shawnee to Vietnam instead of the CH-34, pending the introduction into widespread service of the Bell UH-1 Iroquois.

HMX-1

Marine Helicopter Squadron OneMarine Helicopter Squadron 1Marine Experimental Helicopter Squadron 1 (HMX-1)
In 1952, some H-21As were evaluated by USMC helicopter squadron HMX-1 in the air assault role.
They operated the Sikorsky HO3S-1 and the Piasecki HRP-1 and saw their first test of capabilities in May of that year when five squadron aircraft transported 66 Marines from the deck of the to Marine Corps Base Camp Lejeune, North Carolina.

Boeing CH-47 Chinook

ChinookCH-47 ChinookCH-47
In 1965, the Boeing CH-47 Chinook was deployed to Vietnam, and later that year, most CH-21 helicopters were withdrawn from active inventory in the U.S. Army and Air Force.
Some officials in Army Aviation thought that the new helicopter should be operated as a light tactical transport aimed at taking over the missions of the old piston-engined Piasecki H-21 and Sikorsky H-34 helicopters, and be consequently capable of carrying about 15 troops (one squad).

Sikorsky H-19 Chickasaw

H-19Sikorsky H-19Sikorsky HO4S-3
In 1956, seeking a way to use helicopters in a ground-attack role in the Algerian War, the French Air Force and French Army Aviation (Aviation Légère de l'Armée de Terre) experimented with arming the Sikorsky S-55, then being superseded in service by the more capable Piasecki H-21 and Sikorsky H-34 helicopters.
In 1956, the French Air Force experimented with arming the H-19, then being superseded in service by the more capable Piasecki H-21 and Sikorsky H-34 helicopters.

Tandem rotors

tandem rotortandem-rotorTandem
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 (1949)

French Army Light Aviation

ALATArmy Light AviationAviation Légère de l'Armée de Terre
In 1956, seeking a way to use helicopters in a ground-attack role in the Algerian War, the French Air Force and French Army Aviation (Aviation Légère de l'Armée de Terre) experimented with arming the Sikorsky S-55, then being superseded in service by the more capable Piasecki H-21 and Sikorsky H-34 helicopters.
GH 2 was based at Sétif – Aïn Arnat in the east of the country, and it was equipped primarily with machines to undertake transport missions, though the Vertol H-21C, nicknamed the Banane volante (“Flying Banana”) because of its silhouette, would soon join the unit owing to concerns about the lack of machines which could both defend themselves and carry out offensive missions against the insurgents.

Piasecki Helicopter

PiaseckiVertolPiasecki Helicopter Corporation
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).
In 1949, Piasecki provided the H-21 Workhorse to the United States Air Force, an improved, all-metal derivative of the HRP-1.

Wright R-1820 Cyclone

Wright CycloneWright R-1820-F3Cyclone
Using two tandem, fully articulated three-bladed counter-rotating rotors, the H-21 was powered by one nine-cylinder Curtis-Wright R-1820-103 Cyclone supercharged 1150 hp air-cooled radial engine.
The R-1820 was at the heart of many famous aircraft including early Douglas airliners (the prototype DC-1, the DC-2, the first civil versions of the DC-3, and the limited-production DC-5), every wartime example of the Boeing B-17 Flying Fortress and Douglas SBD Dauntless bombers, the early versions of the Polikarpov I-16 fighter (as the M-25), and the Piasecki H-21 helicopter.

New York Airways

New York Airways accident
New York Airways
Passenger flights started with Sikorsky S-55 helicopters, with three Sikorsky S-58s added to its five S-55s in 1956; in 1958 the Boeing Vertol V-44, a 15-seat civil version of the Piasecki H-21 took over.

MG 151 cannon

MG 151/20MG 151/20 cannonMG 151
The H-21C was far more successful as a troop transport, and most H-21Cs in service were eventually fitted with flexible door-mounted guns such as the .50 cal. (12.7 mm) M2 Browning machine gun or the (ex-German) MG 151/20 20 mm aircraft cannon for defensive use when landing assault forces under fire.
The AdA and ALAT jointly developed a rubber-insulated flexible mount for the MG 151/20 for use as a door gun, which was later used in combat in Algeria aboard several FAF/ALAT H-21C assault transport helicopters and on Sikorsky HSS-1 Pirate gunship helicopters.

Tokorozawa Aviation Museum

TokorozawaTokorozawa AirfieldTokorozawa Aviation Memorial Hall
JG-0002 – Model 44A on static display at the Tokorozawa Aviation Museum in Tokorozawa, Saitama.
50002/JG-0002 Piasecki H-21/Ventrol V44A

General Electric T58

T58GE T58-GE-40 enginesCT58-140-1
Two H-21Cs re-engined with two General Electric T58 turboshaft engines in place of the Wright R-1820. Not placed into production.
Piasecki XH-21D Shawnee (Model 71)

Militärhistorisches Museum Flugplatz Berlin-Gatow

Bundeswehr Museum of Military History - Berlin-Gatow AirfieldLuftwaffe MuseumLuftwaffe-Museum
83+08 – H-21C on static display at the Militärhistorisches Museum Flugplatz Berlin-Gatow in Berlin, Berlin.

Classic Rotors Museum

Classic Rotors
54-4001 – CH-21B airworthy at the Classic Rotors Museum in Ramona, California. This is the last H-21 still flown.
Piasecki H-21B - registered N64606, it is the only H-21 still flying today. Built in 1957, the helicopter was obtained by Classic Rotors on January 23, 1990 and restored to flying condition. In 2008 it had an engine failure resulting in an emergency landing in a field at a dairy farm in San Pasqual Valley in California. It was returned to the museum and repaired to flying condition again in October 2009. The cause of the engine failure was a spring on one of the pistons that broke.

Hubschraubermuseum Bückeburg

Helicopter Museum of BückeburgBückeburg Helicopter Museumhelicopter museum
83+07 – H-21C on static display at the Hubschraubermuseum Bückeburg in Bückeburg, Lower Saxony.
Vertol V-43 / H-21 C

Travis Air Force Base Heritage Center

52-8688 – CH-21B on static display at the Travis Air Force Base Heritage Center near Fairfield, California.
HH-21 Shawnee

Museum of Aviation (Warner Robins)

Museum of Aviation
52-8685 – CH-21B on static display at the Museum of Aviation at Robins AFB near Warner Robins, Georgia.
Vertol CH-21B "Workhorse"

Swedish Air Force Museum

Flygvapenmuseum
*Hkp 1 on static display at the Swedish Air Force Museum in Linköping, Östergötland.
Hkp 1 (Vertol 44A)

Musée de la Défense aérienne

* 642 – On display at the Musée de la Défense aérienne of CFB Bagotville, Quebec

Arkansas Air & Military Museum

53-4354 – CH-21C on static display at the Arkansas Air & Military Museum in Fayetteville, Arkansas.
It includes a Boeing-Stearman NS2S (PT-17), a Curtiss-Wright CW-1 Junior, a Dassault Falcon 20, a Douglas A-4 Skyhawk, a Howard DGA-11, a Howard DGA-18K, a Learjet 23, a Piper Tri-Pacer, a Stinson Junior, and a Travel Air Model R "Mystery Ship" replica; the museum also houses a variety of helicopters, including a Bell AH-1S Cobra, a Bell UH-1H Huey, and a Piasecki H-21C Shawnee.

Bihoro Aviation Park

JG-0001 – Model 44A on static display at the Bihoro Aviation Park in Bihoro, Hokkaido.
JG-0001 Piasecki H-21 (Japan Ground Self-Defense Force)

Pueblo Weisbrod Aircraft Museum

Weisbrod Aircraft Museum
53-4347 – CH-21B on static display at the Pueblo Weisbrod Aircraft Museum in Pueblo, Colorado.
Piasecki H-21 - USAF

Alaska Aviation Museum

Alaska Aviation Heritage Museum
54-4404 – CH-21B on static display at the Alaska Aviation Heritage Museum in Anchorage, Alaska.
Piasecki H-21B 54-4004

March Field Air Museum

53-4326 – CH-21B on static display at the March Field Air Museum at March Air Reserve Base (former March AFB) in Riverside, California.
Piasecki H-21 Workhorse 53-4326

Vintage Flying Museum

53-4324 – CH-21B on static display at the Vintage Flying Museum in Fort Worth, Texas. This airframe was previously on display at the Pate Museum of Transportation in Cresson, Texas.
Piasecki H-21 *