Vertical Takeoff and Landing (VTOL)

Vertical Takeoff and Landing (VTOL)

A vertical take-off and landing (VTOL) aircraft is one that can take off and land vertically without relying on a runway. This classification includes various types of aircraft, including helicopters, thrust-vectoring fixed-wing aircraft, tiltrotors, and other rotorcraft with powered systems like cyclogyros, cyclocopters, and gyrodyne types.

Some VTOL aircraft can also operate in CTOL, STOL, or STOVL configurations. Others, like helicopters, operate exclusively as VTOL due to the absence of landing gear for taxiing.

History

VTOL concepts date back to early visions of vertical flight like Leonardo da Vinci’s sketches. Many prototypes were created throughout the 20th century, especially during and after World War II.

Lockheed and Convair both developed early VTOL fighters, with programs such as the XFV and XFY. The Ryan X-13 Vertijet was another key tail-sitter example developed in the 1950s.

British and European development included concepts like the Fairey Jet Gyrodyne, which tested hybrid rotor/jet systems.

Jet Lift

Aircraft like the Canadair CL-84 Dynavert explored the use of tilting wing and engine systems to achieve VTOL capability.

Tiltrotors

Tiltrotors use rotating nacelles to transition between vertical and horizontal flight, exemplified by the Bell-Boeing V-22 Osprey.

Tail-sitters

Tail-sitters take off and land on their tails before transitioning to horizontal flight, a concept explored by aircraft like the Ryan X-13 and XFY-1.

Lift Jet Systems

VTOL aircraft like the Yakovlev Yak-38 employed lift jets which provided vertical lift and were then shut down for normal flight.

Early British Development

The Short SC.1 pioneered British VTOL research and used multiple vertical engines for testing transition to forward flight.

Harrier / Modern STOVL

The Harrier and F-35B represent the most successful STOVL platforms using vectored thrust or a lift-fan plus rear nozzle vectoring combination.

Drones

Modern eVTOL drones, like quadcopters, have become widespread in commercial, industrial, and military applications.

Gallery

File:Royal International Air Tattoo 2018 MOD 45164432.jpg An RAF F-35B Lightning II demonstrating a vertical landing	File:Xv-15 inflight.jpg Bell XV-15	File:Convair XFY-1 Pogo 2.jpg Convair XFY-1 Pogo in flight	File:Fairey Jet Gyrodyne-1.jpg Fairey Jet Gyrodyne
File:Fairey Jet Gyrodyne-1.jpg Fairey Jet Gyrodyne	File:CanadairCL-84DynavertSerialCX8402.jpg Canadair CL-84 Dynavert CL-84-1 (CX8402) on display at the Canada Aviation and Space Museum in Ottawa, Ontario	File:Aircraft.osprey.678pix.jpg U.S. Marines jump from a Bell-Boeing V-22 Osprey, the first production tiltrotor aircraft	File:Ryan X-13.jpg The Ryan X-13
File:Yak-38 Lift Engines NT.PNG The Soviet Union's VTOL aircraft, the Yakovlev Yak-38	File:Short SC.1.jpg The Short SC.1 a VTOL delta aircraft	File:INAS 300 Sea Harrier vertical landing on a carrier.JPG Landing of Harrier jump jet with Indian Naval Air Arm	File:F-35B Lighting II training flights 170203-M-ON157-0436.jpg The F-35B uses a ducted fan and also directs (vectors) its rear exhaust downward.