Vertipedia is a product of the Vertical Flight Society. With data on 864 aircraft, 620 historical milestones, 502 people, and 395 organizations, Vertipedia is your "one-stop shop" for all things vertical lift.

1954 - First free flight of a manned, all-jet VTOL aircraft

1954 - First flight of a Jet VTOL vehicle (Rolls-Royce TMR)

Our latest featured aircraft for August is the Cierva W.11 Air Horse .


The aircraft was designed to provide viable heavy load lifting capability for commercial operations. It employed 3 main rotors all rotating in the same direction. Torque offset was provided by thrust components from the 3 rotors through built-in shaft tilt. The aircraft had a semi-monoquoque structure, a single engine, and a long-stroke undercarriage (5ft) to cope with high rates of descent.  A description of the aircraft and its characteristics can be found in the following references,

Source: "The Cierva W-11 Air Horse", J. Gordon Leishman, VERTIFLITE Spring 2003, Page 52

Source: "Discussing the Helicopter", FLIGHT Staff, FLIGHT, December 2nd 1948, Pages 665-668

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Vertipedia notes are brief descriptions of how and why Vertipedia works the way it does. Check back often for the latest note, or view the complete list.

Adding Aircraft Images into Vertipedia

Images can be added directly into Vertipedia or from the VFS Gallery using the Contributor functions. Adding images from the Gallery is the easier option by far. It is important that a contributor only uses images for the exact model of aircraft in question (e.g. Bell AH-1Z rather than a generic image of an AH-1). The images section for a specific aircraft aims to provide a complete view of the key characteristics of the aircraft and there is no limit to the number of images that can be used.

Vertipedia makes it easy for you to find a range of information on vertical flight, including:

  • Targeted searches of documents provided by the Vertical Flight Society, as well as public sources from across the internet
  • Important milestones that have helped shape the history of vertical flight
  • People who have played a role in vertical flight
  • Vertical flight aircraft, such as helicopters, tilt rotors and tilt wings, jet-lift VTOL, and more.

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