▁Pur pose ▁X tre me ▁in ▁Canada . ▁Diam ond ▁DA 3 6 ▁E - Star ▁Develop ed ▁by ▁S iem ens , ▁E AD S ▁and ▁Diam ond ▁A ircraft ▁to ▁reduce ▁fuel ▁consumption ▁and ▁em issions ▁by ▁up ▁to ▁ 2 5 ▁percent , ▁using ▁a ▁serial ▁hy brid ▁drive ▁that ▁turns ▁the ▁aircraft ' s ▁prop ▁with ▁a ▁S iem ens ▁ ▁electric ▁motor , ▁from ▁power ▁generated ▁by ▁a ▁ ▁Aust ro ▁Eng ines ▁W ank el ▁rot ary ▁engine ▁and ▁generator , ▁stored ▁in ▁batter ies . ▁The ▁prototype ▁first ▁fle w ▁ 8 ▁June ▁ 2 0 1 1 . ▁Hoff mann ▁H 3 8 ▁Ob server ▁A ▁surve ill ance ▁aircraft ▁largely ▁based ▁on ▁the ▁H 3 6 ▁Dim ona ▁which ▁failed ▁to ▁enter ▁flight ▁testing ▁due ▁to ▁failure ▁of ▁the ▁partners hip ▁between ▁Wolf ▁Hoff mann ▁and ▁Hoff mann ▁Flug zeug bau . ▁ ▁Oper ators ▁▁ ▁Indian ▁Air ▁Force ▁ ▁Spec ifications ▁( H off mann ▁H 3 6 ▁Dim ona ) ▁ ▁See ▁also ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : 1 9 8 0 s ▁United ▁States ▁sail plan es ▁H K 3 6 ▁Category : T - tail ▁aircraft ▁Category : L ow - wing ▁aircraft ▁Category : Single - eng ined ▁tra ctor ▁aircraft ▁Category : M ot or ▁gl iders ▁Category : A ircraft ▁first ▁flow n ▁in ▁ 1 9 8 9 <0x0A> </s> ▁ 4 ▁U ▁is ▁the ▁debut ▁extended ▁play ▁( EP ) ▁release ▁by