LF-107 Luňák at RACBSA - HD 50fps
1,786 views · Published 15 January 2018 · 3:52 · Indexed 8 November 2026
Channel: Airguardian · 2018 · Autos & Vehicles
Semi-scale of the Czechoslovak aerobatics glider LF - 107 Luňák. This model is designed as an acrobatic glider, capable of full aerobatics. Luňák is suitable for slope flying, aerotow or take off through winch. The model shown on the video has been modified with an electric motor system and folding propeller to be able to take-off on its own. It was awarded "The Model of the Year 2002" at Model Hobby Fair in Prague. Model Features: - Fibreglass fuselage - Two-pieces foam/balsa wing - Fibreglass leading edge - Wing joiner located in the middle of fibreglass spar - Wing supported by carbon stripes and fibreglass under the balsa cover. Although the wing is not made from fibreglass, it has similar characteristics of stiffness, still being very light - Ailerons and wing flaps fall into two parts - being 6 of them - Clear canopy - Oracover on wings and balsa tail parts - Tight covering, with all seams hand-sealed RC function: - Rudder, elevator, ailerons (2 flaps for each side), wing flaps Technical Data Wingspan : 4000 mm Length : 1840 mm Weight : 4200 g Area : 124,8 dm2 Airfoil : E 211 This model has crashed and 'rests in peace' so this is likely the only video that has ever been taken of it, enjoy! http://www.reichard.cz/en/models/gliders/lunak/ Now some info about the real plane: The LF-107 Luňák (English: Kite) is a Czech aerobatic glider designed by Rudý Letov in the late 1940s. The design was developed within a prolific group of aeronautical engineers and sailplane pilots, including K. Dlouhý, J. Matejcekm, and B. Bocek. 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 an 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 and MiG-21F aircraft, and access to Western civil export markets was progressively hampered by the emergence of the Iron Curtain. Therefore, only 75 examples of the Luňák were produced in all. 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. Specifications (LF-107 Luňák) Crew: one Length: 6.78 m Wingspan: 14.27 m Wing area: 13.38 m2 Aspect ratio: 15.22 Empty weight: 205 kg Gross weight: 310 kg Maximum speed: 300 km/h Maximum glide ratio: 24 at 80 km/h Rate of sink: at 65 km/h 0.85 m/s If you dearly enjoy my content, please consider supporting me on Patreon! https://www.patreon.com/Airguardian I'd feel really grateful that you take some time to SHARE this video with your friends, LIKE and off course, SUBSCRIBE! --------------------------------------------------------------------------------------------------------- My AIRSOFT YouTube channel: (Mostly airsoft gameplays) https://www.youtube.com/airguardianairsoft My secondary aviation YouTube channel: (For vlogging and RC tutorials and weird stuff that I think has no place in my main channel) https://www.youtube.com/channel/UCuwKpdGc3oxdmVkKSTS3FqA --------------------------------------------------------------------------------------------------------- You can also follow me on: Facebook: https://www.facebook.com/RC4ever Twitter: https://www.twitter.com/RC4Media Instagram: https://www.instagram.com/jet3d_master Patreon: https://www.patreon.com/Airguardian
