In 1951, the U.S. Army and Air Force joined initiation for a need of new VTOL aircraft to enable safe rescue operations. A competition was announced to provide demonstrations of different approaches for meeting the convertiplane requirement. At the time Sikorsky had been designing the Model S-57 that a delta-wing airplane was installed with a retractable rotor on top of the fuselage. The system featured a rotor that could folded up for take-off and landing as helicopter, and stopped to store in the fuselage for level flight. In order to fit the rotor mechanism into the storage bay, a single blade rotor with encounter rod was chosen. U.S. Army accepted the proposal from Sikorsky, the designation XV-2 and serial number 54-0043 were given to the prototype which in competition with McDonnell XV-1 and Bell XV-3. However, the design was kept to study and change while Sikorsky spent most facilities on the helicopter production for the Korean War. The prototype hardware was never started to build. In 1960, the XV-2 project was cancelled.

Type:

Purpose:

Span:

Length:

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Engine:

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Stoppable-rotor VTOL aircraft

To propose to meet convertiplane requirement

19ft.6in.

45ft.8in.

12ft.9in.

1x Armstrong Siddeley Mamba II or Allison 501-C1

Unknown

1

None

The Sikorsky XV-2 / XH-36 is suitable to group with the following collection series.

U.S. helicopter 1946 ~ present

Firestone XH-9 (XR-9)

Kellett XH-10 (XR-10)

Rotorcraft XH-11 (XR-11) Dragonfly

Bell YH-12

Bell H-13 Sioux

Bell XH-15

Piaseki YH-16 Transporter

Hughes XH-17 Flying Crane

Sikorsky YH-18

Sikorsky H-19A Chickasaw

McDonnell XH-20 Little Henry

Piasecki H-21 Work Horse

Kaman OH-22 (K-225)

Hiller OH-23 Raven

Seibel YH-24 Skyhawk

Piasecki H-25 Army Mule

American XH-26 Jet Jeep

Piasecki XH-27 (YH-16A)

Hughes XH-28

McDonnell XH-29 (XH-20A)

McCulloch YH-30

Doman YH-31

Hiller YH-32 Hornet

Bell XH-33 (XV-3) Convertiplane

Sikorsky CH-34A Choctaw

McDonnell XH-35 (XV-1) Convertiplane

Sikorsky XH-36 (XV-2)

Sikorsky CH-37 Mojave

U.S.A.F./Sikorsky H-38 Short Tail

Sikorsky YH-39

Bell YH-40 (UH-1) Iroquois

Cessna YH-41 Seneca

Hughes XH-42 (TH-55A) Osage

Kaman HH-43A Huskie

U.S.A.F. H-44 Big Tom project

U.S.A.F. XH-45 Step Child project

Boeing CH-46 Sea Knight

Boeing CH-47 Chinook

H-48 (Missile site)

Boeing-Vertol CH-49 (CH-46B) Sea Knight

Gyrodyne QH-50

Lockheed XH-51A Compound

Sikorsky HH-52 Sea Guard

Sikorsky CH-53C Jolly Green Giant

Sikorsky CH-54 Skycrane

Hughes TH-55 Osage

Lockheed AH-56A Cheyenne

Bell TH-57 Sea Ranger

Bell OH-58 Kiowa

Sikorsky XH-59A

Sikorsky H-60 Night Hawk

Boeing-Vertol YUH-61

Boeing-Vertol XCH-62 HLH

Bell YAH-63

McDonnell Douglas AH-64 Apache

Aerospatiale HH-65A Dolphin

Boeing-Sikorsky RAH-66 Comanche

Bell TH-67 Creek

Agusta MH-68A Stingray

McDonnell-Douglas MH-90 Enforcer

U.S. V/STOL experimental aircarft

McDonnell XV-1 (XH-35) Convertiplane

Sikorsky XV-2 (XH-36)

Bell XV-3 (XH-33) Convertiplane

Lockheed XV-4A Hummingbird

Ryan XV-5A Vertifan

Hawker Siddeley XV-6A Kestrel

De Havilland CV-7 Buffalo

McDonnell Douglas/British Aerospace AV-8A Harrier

Hughes XV-9A Hot Cycle

Rockwell International OV-10A Bronco

M.S.U. XV-11 Marvel

Rockwell International XFV-12

Bell XV-14A (redesignated to XV-15A)

Bell XV-15A Tiltrotor

McDonnell Douglas/Hawker Siddeley XV-16 Super Harrier

DeHavilland UV-18A Twin Otter

NavAir V-19A (cancelled)

Pilatus UV-20A Chiricahua

U.S. Navy's PV-21 Patrol Airship concept (cancelled)

Bell V-22 Osprey

Skytrader UV-23A

Post war U.S. experimental aircraft