Vertipedia is a product of the Vertical Flight Society. With data on 861 aircraft, 613 historical milestones, 474 people, and 393 organizations, Vertipedia is your "one-stop shop" for all things vertical lift.

1935 - First practical use of cyclic pitch (Hafner A.R.III)

1969 - First flight of the prototype of the Mil Mi-24 Type series

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

Attribution

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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Milestone title format

The title of a milestone is meant to succinctly summarize the milestone. As such, the title generally follows the following format,
Description of event (related aircraft designation)
e.g. First helicopter shipboard take-off and landing (Flettner Fl 265 V4)
The inclusion of the aircraft designation is important to help in relating an aircraft to a milestone through the Contributor functions. The details of the event can then be included in the description of the milestone.

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
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  • 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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