Sportinė Aviacija LAK-12

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Sportinė Aviacija LAK-12
Landing glider "Sportine Aviacija LAK-12 Lietuva" (5839855267) .jpg
Type: Glider
Design country:

Soviet UnionSoviet Union Soviet Union

Manufacturer:

Sportinė Aviacija ir Ko

First flight:

April 1986 (LAK-12DR)

Number of pieces:

> 190

The LAK-12 "Lietuva" is a Soviet / Lithuanian single-seat glider for the open class , which was built by LAK (Lietuviškos Aviacinės Konstrukcijos) and later by Sportinė Aviacija and Sport Aviation USSR.

construction

The LAK-12 was designed for the open class in the 1980s.

GRP and CFRP were used for the cell . For the wings with a foam core and a span of 20.42 meters, a Wortmann FX67-K-170 profile was used in the area of ​​the root , which merges into an FX67-K-150 profile towards the wing tip. The wings have double- deck air brakes and flaps that can be locked in the positions −7 °, −4 °, 0 °, + 5 °, + 11 ° and + 15 °. The wing is not divided like the ASW 17 or the Nimbus . The wing tanks can hold a maximum of 190 l of water ballast, the drain valve is located in the middle of the fuselage. The aircraft has a muted retracting landing gear and a grinding spur. The hood is designed in one piece and opens to the front.

In 1985, three members of the Soviet national glider team Antanas Rukas, Algemantas Ionusas and Alexander Silwanowitsch modified the aircraft for two-seater record flights on the European continent. The cockpit was lengthened, fitted with a side-folding hood and a new landing gear was designed. In April 1986 the first flight of the LAK-12DR "Lietuva-2R" followed.

use

In August 2011, 24 LAK-12s were listed in the US aircraft directory, all in the Experimental - Racing / Exhibition category . One aircraft was operated in the Limited Class of Transport Canada .

With the two-seater special version LAK-12DR, a women’s world record was set on May 16, 1986 with an average speed of 96 km / h on a 500 km triangle, another week later the DOSAAF flight instructors Tamara Swiridova and Valentina Toporova helped a target return route of 652 km in length.

Technical specifications

Parameter LAK-12 "Lietuva" LAK-12DR "Lietuva-2R"
crew 1 2
length 7.73 m
span 20.42 m 20.40 m
Wing area 14.63 m² 14.60 m²
Wing extension 28.5
Profile root Wortmann FX67-K-170 Wortmann FX71-L-150
Profile end face Wortmann FX67-K-150 Wortmann FX71-L-150/30
Max. Water ballast 190 l
Empty mass approx. 360 kg
Max. Takeoff mass 650 kg 660 kg
Wing loading 38-45 kg / m²
Glide ratio 47 at 95 km / h 48 at 115 km / h
Slightest sinking 0.48 m / s at 75 km / h 0.50 at 80 km / h
Minimum speed 70 km / h
Top speed 250 km / h

See also

Similar aircraft:

Web links

Commons : LAK-12  - collection of pictures, videos and audio files

Individual evidence

  1. ↑ a b c Activate Media: LAK-12 Sportina Aviacija . 2006. Archived from the original on May 3, 2002. Retrieved August 26, 2011.
  2. ↑ a b Federal Aviation Administration : Make / Model Inquiry Results . August 2011. Retrieved August 26, 2011.
  3. ↑ David Lednicer: The Incomplete Guide to Airfoil Usage . 2010. Archived from the original on April 20, 2010. Retrieved on August 1, 2011.
  4. ↑ a b c Hartmut Buch: Record flights . In: Fliegerrevue . No. 10 , 1987, pp. 300-305 .
  5. ^ Transport Canada : Canadian Civil Aircraft Register . August 2011. Archived from the original on August 24, 2013. Retrieved on August 26, 2011.
  6. ↑ Flight Manual For The Sailplane LAK-12 "Lietuva" ( Memento from March 4, 2016 in the Internet Archive ) (PDF; 23.2 MB), accessed on January 15, 2013