ord . ▁The ▁upper ▁wing ▁had ▁straight ▁edges , ▁a ▁wider ▁span ▁and ▁wider ▁ch ord , ▁the ▁lower ▁wing ▁had ▁cur ved ▁tips . ▁The ▁pilot ' s ▁co ck pit ▁was ▁below ▁the ▁rear ▁half ▁of ▁the ▁upper ▁wing , ▁with ▁a ▁cur ved ▁cut - out ▁for ▁the ▁pilot . ▁ ▁Development ▁The ▁first ▁prototype ▁of ▁the ▁D . IV ▁was ▁destroyed ▁in ▁a ▁flight ▁on ▁ 5 ▁January ▁ 1 9 1 8 , ▁when ▁the ▁c rank sh aft ▁broke ▁in ▁flight , ▁creating ▁a ▁fire . ▁The ▁second ▁prototype ▁made ▁it ▁to ▁the ▁first ▁of ▁the ▁D - type ▁f ighter ▁compet itions ▁at ▁Ad lers hof , ▁but ▁was ▁lost ▁on ▁ 2 9 ▁January ▁ 1 9 1 8 ▁when ▁the ▁engine ▁caught ▁fire , ▁destroy ing ▁the ▁aircraft . ▁Because ▁both ▁pro tot ypes ▁were ▁destroyed ▁in ▁crashes , ▁the ▁D . IV ▁program ▁was ▁ax ed . ▁ ▁Spec ifications ▁ ▁References ▁ ▁Category : 1 9 1 0 s ▁German ▁f ighter ▁aircraft ▁D ▁ 0 4 ▁Category : Rot ary - eng ined ▁aircraft ▁Category : Bi plan es <0x0A> </s> ▁Ball ande an ▁Hom est ead ▁is ▁a ▁her itage - list ed ▁hom est ead ▁at ▁Ball ande an , ▁Southern ▁Down s ▁Region , ▁Queensland , ▁Australia . ▁It ▁was ▁built ▁from ▁ ▁to ▁ 1 8 9 0 s ▁circa . ▁It ▁was ▁added ▁to ▁the ▁Queensland ▁Heritage ▁Register ▁on ▁ 2 1 ▁October ▁ 1 9