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| LAK 17B The LAK 17B is Sportine Aviacija's latest design with a completely new 4 piece wing specifically designed for the 18m class with a maximum All Up Weight of 600kg. 
The new wing provides very good climbing performance especially at higher wing loadings. With an empty weight of 260kg and a maximum takeoff weight of 600kg, the LAK 17B provides a wing loading ranging from 32 kg/m2 up to 58kg/m2. The LAK 17B wing design is based on  the principles of high wing lift coefficient’s by Krzysztof Kubrynski at the Institute of Aeronautics and Applied Mechanics, Warsaw University of Technology, which have proved very successful with the Diana 2. | Sailplane | LAK-17B | LAK-17B Turbo | | Wing span, m | 15 | 18 | 15 | 18 | | Wing area, m2 | 9,18 | 10,32 | 9,18 | 10,32 | | Wing aspect ratio | 24,51 | 31,39 | 24,51 | 31,39 | | Fuselage length, m | 6,53 | 6,53 | 6,53 | 6,53 | | Height, m | 1,322 | 1,322 | 1,322 | 1,322 | | Empty mass approx. kg | 250 | 260 | 296,4 | 306,4 | | Max TOW, kg | 550 | 600 | 550 | 600 | | Max TOW without ballast, kg | 360 | 370 | 416,4 | 426,4 | | Water ballast (wings), kg | 160 | 200 | 133,6 | 173,6 | | Water ballast (fuse-option), kg | 30 | 30 | | | Fuel, l
| | | 8 | 8 | | VNE, km/h | 270 | 270 | 270 | 270 | | VA, km/h | 205 | 205 | 205 | 205 | | Best L/D with mx TOW | | | | | | Pilot max weight, kg | 110 | 110 | 110 | 110 | | Pilot min weight, kg | 70 | 70 | 70 | 70 | | Wing loading, kg/mm2: | | | | | | minimum | 34,85 | 31,97 | 39,91 | 36,47 | | maximum | 59,91 | 58,13 | 59,91 | 58,13 |
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