Sportinė Aviacija LAK-17

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Sportinė Aviacija LAK-17
Szybowiec Lak 17 (cropped) .jpg
Type: Glider
Design country:

LithuaniaLithuania Lithuania

Manufacturer:

Sportinė Aviacija ir Ko

First flight:

July 9, 1992

The LAK-17 is a high-performance glider for the 15 m / 18 m class from the manufacturer UAB Sportinė Aviacija in Lithuania.

construction

The LAK-17 is a mid-decker in fiber composite construction with flaps, retractable landing gear and water ballast tanks in the wings. It had its maiden flight on July 9, 1992 in Prienai and is certified according to JAR22. In 2013 the LAK-17b "Mini" was presented, which made its maiden flight on May 6, 2013 with a wingspan of only 13.5 m. In 2014 the LAK-17b with a wingspan of 21 m was presented (first flight May 30, 2014). This makes the LAK-17 the only known glider whose wingspan varies between 13.5 m / 15 m / 18 m and 21 m. However, neither the “Mini” nor the version with 21 m wingspan are included in the type certification (as of October 2014).

Versions

Fuselage of the LAK-17bt with the engine deployed
LAK-17a
Flap glider with a wingspan of 15 or 18 meters.
LAK-17AT
Variant of the LAK-17a with homecoming aid. Air-cooled two-cylinder two-stroke engine Solo 2350 with 19.6 kW as a retractable engine.
LAK-17a FES
Variant of the LAK-17a with an electric "Front Electric Sustainer" return home aid.
LAK-17b
Improved variant of the LAK-17a with a new wing profile and changed geometry.
LAK-17bT
Variant of the LAK-17b with folding drive Solo 2350 as a homecoming aid.
LAK-17b FES
Variant of the LAK-17b with an electric “Front Electric Sustainer” return home aid.

A "standardized" version of the LAK-17a with a fixed wing profile and adjusted setting angle is offered by the manufacturer as LAK-19 .

Technical specifications

Technical data of the LAK-17A LAK-17AT LAK-17B LAK-17BT LAK-17B FES
span 15 m 18 m 15 m 18 m 15 m 18 m 15 m 18 m 21 m 15 m 18 m 21 m
Wing area 9.06 m² 9.8 m² 9.06 m² 9.8 m² 9.18 m² 10.32 m² 9.18 m² 10.32 m² 11.58 m² 9.18 m² 10.32 m² 11.58 m²
Wing extension 24.63 33 24.51 31.39 24.51 31.39 38.08 24.51 31.39 38.08
Hull length 6.53 m
height 1.29 m 1.32 m
Empty mass 220 kg 226 kg 250 kg 260 kg 296.4 kg 306.4 kg 332 kg 325 kg 335 kg
Max. Takeoff mass 453 kg 500 kg 550 kg 600 kg 550 kg 600 kg 550 kg 600 kg
Wing loading 31.5-50 kg / m² 30.1-46.2 kg / m² 36.4-55 kg / m² 34.2-51 kg / m² 34.85-59.91 kg / m² 31.97-58.13 kg / m² 40.8-60 kg / m² 37.8-58 kg / m² 34.7-51.8 kg / m² 42-60 kg / m² 35-58 km / m²
Max. Cockpit payload 110 kg
Max. Water ballast wing tank 190 kg 180 kg 160 kg 200 kg 180 kg 200 kg 150 kg 190 kg
Hull ballast - Max. 30 kg (optional tank) 31 kg (batteries)
Max. fuel - 7.5 l - 8 l -
Top speed 275 km / h 270 km / h 275 km / h 220 km / h 275 km / h
Maneuver speed 215 km / h 190 km / h 205 km / h
Slightest sinking 0.53 m / s 0.48 m / s
Glide ratio without ballast 44 at 95 km / h 49 at 95 km / h
Glide ratio with ballast 45 at 115 km / h 50 at 115 km / h
Glider index (as of 2018) 113 117
permissible load multiples without ballast + 7.2 / -3.6 g + 5.3 / −2.65 g + 5.3 / −2.65 g
permissible load multiples with ballast + 5.3 / −2.7 g

Web links

Commons : LAK-17  - collection of pictures, videos and audio files

Individual evidence

  1. ↑ Peter F. Selinger: Lithuania: LAK-17 flies . In: aerokurier . No. 9 , 1992, pp. 104 .
  2. ↑ LAK-17A ( Memento of March 13, 2012 in the Internet Archive )
  3. ↑ European Aviation Safety Agency Type Certificate Data Sheet A.083 (PDF; 220 kB)
  4. ^ Front Electric Sustainer
  5. ↑ a b LAK-17B ( Memento from March 13, 2012 in the Internet Archive )
  6. ↑ LAK-17 FES ( Memento from March 13, 2012 in the Internet Archive )
  7. ↑ Flight manual LAK-17AT ( Memento from March 4, 2016 in the Internet Archive ) (PDF; 1.2 MB)
  8. ↑ LAK17B FES. In: front-electric-sustainer.com. Retrieved December 13, 2018 .