▁ 1 9 6 3 . ▁It ▁gained ▁permission ▁to ▁fly ▁in ▁cloud ▁and ▁to ▁perform ▁aer ob atic ▁loops , ▁st alls ▁and ▁sp ins . ▁However , ▁flight ▁testing ▁showed ▁that ▁the ▁double ▁rect angular ▁wing ▁was ▁not ▁a ▁success ▁and ▁the ▁third ▁prototype , ▁the ▁K S - 2 ▁K art ik ▁first ▁flow n ▁on ▁ 4 ▁May ▁ 1 9 6 5 , ▁had ▁instead ▁a ▁wing ▁with ▁conventional ▁straight ▁t aper . ▁ ▁Area ▁and ▁span ▁remained ▁the ▁same , ▁though ▁the ▁a iler ons ▁were ▁given ▁sl ots ▁and ▁the ▁air bra ke ▁area ▁increased . ▁A ▁wheel ▁bra ke ▁was ▁added ▁and ▁maximum ▁take - off ▁weight ▁increased ▁by ▁about ▁ 7 %. ▁Other ▁changes ▁were ▁minor ; ▁there ▁was ▁a ▁ ▁increase ▁in ▁length ▁and ▁a ▁lower ing ▁of ▁the ▁co ck pit , ▁now ▁fitted ▁with ▁a ▁rear ▁h ing ed ▁can opy ▁and ▁with ▁a ▁better ▁forward ▁view . ▁In ▁all ▁seven ▁K art ik ▁II s ▁were ▁built , ▁the ▁last ▁at ▁the ▁end ▁of ▁ 1 9 7 5 . ▁This ▁final ▁example ▁had ▁sl otted ▁f laps ▁instead ▁of ▁air bra kes . ▁ ▁Oper ational ▁history ▁At ▁the ▁first ▁Indian ▁national ▁gl iding ▁r ally ▁in ▁ 1 9 6 7 ▁the ▁K art ik ▁set ▁a ▁national ▁speed ▁record ▁over ▁a ▁ ▁tri angular ▁course . ▁ ▁Vari ants ▁K S - I ▁K art ik ▁First ▁two ▁pro tot ypes , ▁first ▁flow n ▁ 1