The LF-107 Luňák (English: Kite) 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.

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.

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.

[citation needed] Its maiden flight took place in Praha Letnany in August 1951.