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Letov LF-107 Luňák

Czechoslovak sailplane

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJul 13, 2025
Entity authorityQ494185 ↗
Source-derived summary

The LF-107 Luňák (English: Kite, the bird of prey) is a Czech aerobatic glider designed by Prague-based company Rudý Letov in the late 1940s. The design was developed within a prolific group of aeronautical engineers and sailplane pilots, including K. Dlouhý (later author of LET L-13 Blaník), J. Matejček, and B. Boček, led by chief designer Vladimír Štros.

Design and development

The first flight of the prototype took place on June 25, 1948, and a second prototype flew in July. The prototype participated later in the same year in aerobatic competition in Grenchen, Switzerland, and in Ziar, Poland in 1949, where its good aerobatic and gliding characteristics drew considerable attention.

Unfortunately, serial production was disrupted by geopolitical developments, as the factory was charged with production of MiG-15, MiG-19, MiG-21F aircraft, and access to Western civil export markets were progressively hampered by the emergence of the Iron Curtain. Therefore, only 75 examples of the Luňák were produced.

In 1950, a variant with simpler construction and a revised cockpit, among other changes, was developed. This LF-107 Luňák of wooden construction designated Letov VT-7 under the military training system was instrumental in the development of gliding and aerobatics in the Czech Republic. The LF-107 was also used for aerobatic training in the Soviet Union, Bulgaria, Romania and Poland.

XLF-207 Laminar

The Letov XLF-207 Laminar, a derivative of the Luňák, was the first glider in the world with a laminar flow wing.

Editorial summary

This brief starts where responsible research should: with the source description of “Letov LF-107 Luňák” as czechoslovak sailplane. Everything that follows is an evidence route, not borrowed authority.

Editorial reviewA concise reference frame for defining the subject, testing terminology and identifying the institution closest to the evidence. The current lead gives the account dated anchors—1948, 1949, 1950—that can be checked directly. The selected authority fields contribute no independent date. The account is most persuasive where Letov, LF-107 and Luňák can be independently traced.
Editorial analysis

Why this record matters

The subject matters to the general reference register because the source frames it as czechoslovak sailplane. Its deeper value depends on whether names, dates, institutions and citations support that framing.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jul 13, 2025. The linked authority identifier is Q494185. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1948, 1949 and 1950.

Critical limits

A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

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Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

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Source & attribution

This entry incorporates text from “Letov LF-107 Luňák” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.