LAK-17
LAK-17 | |
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Role | 15 metre-class and 18 metre-class sailplane |
National origin | Lithuania |
Manufacturer | Sportinė Aviacija |
Status | In production (2015) |
The LAK-17 is a Lithuanian single-seat sailplane that was designed at the Lithuanian Aero Club (Lithuanian: Lietuviškos aviacinės konstrukcijos or LAK), and is manufactured by Sportinė Aviacija.
Design and development
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/1f/LAK-17bt.jpg/220px-LAK-17bt.jpg)
The LAK-17 is designed to meet the requirements of the utility category of JAR-22.[1] It is a single-seat mid-wing sailplane of composite construction with a T-tail and flaps, it has a retractable single-wheel main landing gear and has airbrakes on the upper wing surface.[1] The airfoil is a combination of the LAP92-130/15, at its roots, and the LAP-92-150/15, at its tips.[2] The LAK-17 holds water ballast in tanks in the wing and fin.[1] The LAK-17A was certified in November 1994 by the Lithuanian Civil Aviation Authority.[1] A new variant with an improved wing was designated the LAK-17B.[3] All variants have a 15.00 m (49.21 ft) wingspan but a wing with span increased to 18.00 m (59.06 ft) is available as an option; powered self-sustaining versions are also produced.[1][3]
An optional front electric sustainer engine variant was developed for the LAK-17 by Slovenian engineers at LZ Design. It originally had a 0.9 metre propeller, and the latest versions have a 1.0 metre propeller in the nose driven by an electric motor.[4][5]
Variants
- LAK-17A
- Production flapped 15- or 18-metre wingspan sailplane.[2]
- LAK-17AT
- Powered self-sustaining sailplane variant of the LAK-17A with a Solo 2350 two-cylinder air-cooled two-stroke retractable engine.[1]
- LAK-17A FES
- A LAK-17A with a front electric sustainer.[4]
- LAK-17B
- Improved variant with new wing profile and modified geometry.[3]
- LAK-17BT
- Powered self-sustaining sailplane variant of the LAK-17B with a Solo 2350 retractable engine.[3]
- LAK-17B FES
- A LAK-17B with a front electric sustainer.[5]
Specifications (LAK-17A with 15 metre wingspan)
Data from [3]
General characteristics
- Crew: one
- Capacity: 188 kg (414 lb) water ballast
- Aspect ratio: 24.63
Performance
- Maximum glide ratio: 45
References
External links
![](http://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)