. ▁ ▁Adv antages ▁Ide ally , ▁with ▁fewer ▁surfaces ▁than ▁a ▁conventional ▁three - a er of o il ▁tail ▁or ▁a ▁T - tail , ▁the ▁V - tail ▁is ▁l ighter ▁and ▁has ▁less ▁w ett ed ▁surface ▁area , ▁so ▁thus ▁produces ▁less ▁induced ▁and ▁par as it ic ▁drag . ▁However , ▁N AC A ▁studies ▁indicated ▁that ▁the ▁V - tail ▁surfaces ▁must ▁be ▁larger ▁than ▁simple ▁projection ▁into ▁the ▁vertical ▁and ▁horizontal ▁plan es ▁would ▁suggest , ▁such ▁that ▁total ▁w ett ed ▁area ▁is ▁roughly ▁constant ; ▁reduction ▁of ▁intersection ▁surfaces ▁from ▁three ▁to ▁two ▁does , ▁however , ▁produce ▁a ▁net ▁reduction ▁in ▁drag ▁through ▁elim ination ▁of ▁some ▁inter ference ▁drag . ▁ ▁Light ▁jet ▁aircraft ▁such ▁as ▁the ▁Cir rus ▁V ision ▁SF 5 0 , ▁the ▁Eclipse ▁ 4 0 0 ▁or ▁the ▁North rop ▁Gr um man ▁R Q - 4 ▁Global ▁Haw k ▁un mann ed ▁aer ial ▁dr one ▁often ▁have ▁the ▁power ▁plant ▁placed ▁outside ▁the ▁aircraft . ▁In ▁such ▁cases ▁V - t ails ▁are ▁used ▁to ▁avoid ▁placing ▁the ▁vertical ▁stabil izer ▁in ▁the ▁exhaust ▁of ▁the ▁engine , ▁which ▁would ▁dis rupt ▁the ▁flow ▁of ▁the ▁exhaust , ▁reducing ▁thrust ▁and ▁increasing ▁wear ▁on ▁the ▁stabil izer , ▁possibly ▁leading ▁to ▁damage ▁over ▁time . ▁ ▁Dis adv antages ▁In ▁the ▁mid - 1 9 8 0 s , ▁the ▁Federal ▁A viation ▁Administration ▁ground ed ▁the ▁Be ech craft ▁Bon anza ▁due ▁to