. . "23.7"^^ . "K. J. Heer and D. Teves"@en . "Akaflieg Darmstadt D-40"@en . . "9.5"^^ . "Maximum 500 kg with water ballast"@en . . . . . . . . . . . . . "The Akaflieg Darmstadt D-40 is an experimental variable geometry single seat sailplane, fitted with almost full span, camber changing flaps for optimum aerodynamics in weak thermals and integrated into the wing so as to minimise flap tip drag. One flew successfully but the D-40, like other variable geometry sailplanes, was not commercialised."@en . "374"^^ . "10358"^^ . . "1"^^ . . . . . . "1.47"^^ . "35"^^ . . . . "smooth air; rough air and aero-tow 190 km/h"@en . "1050869868"^^ . . . "284"^^ . . . . . . . . . . . . . . . . . . . "flap retracted; 11.5 m2 extended"@en . . . "+5.3/-2.6"@en . . . . . . "Experimental high performance sailplane"@en . . . "1"^^ . . . . . . "6.75"^^ . . . "1986-08-15"^^ . . "met"@en . "minimum, flaps in, 52.63 kg/m2 maximum. Flaps out, 28.70 kg/m2 minimum, 43.48 kg/m2 maximum"@en . . . . . . . . . . "Jane's All the World's Aircraft 1987/8"@en . "Inner Wortmann 67 - VG - 170 ; at tips, Wortmann FX60 - 126"@en . . . "34533093"^^ . . . . . . . "The Akaflieg Darmstadt D-40 is an experimental variable geometry single seat sailplane, fitted with almost full span, camber changing flaps for optimum aerodynamics in weak thermals and integrated into the wing so as to minimise flap tip drag. One flew successfully but the D-40, like other variable geometry sailplanes, was not commercialised."@en . . "1"^^ . "15"^^ . . . "295"^^ . . "34.74"^^ .