LAK17B with FES

LAK-17B is new version of LAK17A. Regarding A version, B has new wings with modified geometry and new wing profile, which allow even higher wing loadings than competitors. Fuselage and tail section is identical like A version.

New wings for B version

From the start designed for 18m wigspan with possible 15m tips. New aerodinamic knowledge lead to new wing airfoils, which are based on higher maximum lift coeficient. This princip proved to be very succesfull on Diana 2 and ASG29. With new airfoil there are better climb performance, with higher wing loading, especially in turbulent thermals. Maximum take off weight with 18m wing span is 600kg, which mean wing loading 58kg/m2! In 15m konfiguration wing loading goes to unbelivable 60kg/m2. Competition results will show the rest!
More about new generation of wing profiles you can find on http://www.dianasailplanes.com/Tech_Soar_KK.pdf

Technical data LAK-17B and LAK17B FES

Dimensions, weigts, loadings

Version	LAK17B	LAK17B	LAK17B FES	LAK17B FES
Wing span	15 m	18 m	15 m	18 m
Wing area	9.18 m2	10.32 m2	9.18 m2	10.32 m2
Fuselage lenght	6.53 m	6.53 m	6.53 m	6.53 m
Fuselage height	1.32 m	1.32 m	1.32 m	1.32 m
Aspect ratio	24.5	31.4	24.5	31.4
Empty weight	250 kg	260 kg	285 kg	295 kg
Max TOW	550 kg	600 kg	550 kg	600 kg
Water ballast in wings	160 kg	200 kg	130 kg	170 kg
Water ballast in fuselage (optional)	30 kg	30 kg	batteries	batteries
Batteries weight	/	/	24 kg	24kg
Min. wing loading	34.8 kg/m2	32 kg/m2	39 kg/m2	35.8 kg/m2
Max. wing loading	60 kg/m2	58 kg/m2	60 kg/m2	58 kg/m2
Vne	270 km/h	270 km/h	270 km/h	270 km/h