8 7 4 ▁British ▁ 0 - 6 - 0 ▁steam ▁locomot ive ▁ ▁N CC ▁Class ▁E 1 , ▁a ▁Northern ▁Count ies ▁Committee ▁Irish ▁steam ▁locomot ive ▁ ▁N ER ▁Class ▁E 1 , ▁an ▁ 1 8 9 8 ▁class ▁of ▁small ▁ 0 - 6 - 0 T ▁steam ▁locomot ive ▁ ▁PR R ▁E 1 , ▁an ▁American ▁PR R ▁ 4 - 4 - 2 ▁steam ▁locomot ive ▁ ▁SP & S ▁Class ▁E - 1 , ▁a ▁ 1 9 3 4 ▁steam ▁locomot ives ▁class ▁ ▁A ircraft ▁▁ ▁Az c ár ate ▁E - 1 , ▁a ▁Mexican ▁ses qui plane ▁tra iner ▁ ▁F ok ker ▁E . I , ▁a ▁German ▁f ighter ▁aircraft ▁ ▁Gr um man ▁E - 1 ▁T rac er , ▁an ▁American ▁air bor ne ▁early ▁warning ▁aircraft ▁ ▁H yd ra ▁Techn ologies ▁E 1 ▁G av il án , ▁a ▁hand - launch ed ▁Mexican ▁un mann ed ▁electronic ▁surve ill ance ▁dr one ▁ ▁J unk ers ▁E . I , ▁the ▁Id fl ieg ▁design ation ▁for ▁the ▁ 1 9 1 6 ▁J unk ers ▁J 1 ▁mon op lane ▁ ▁L V G ▁E . I , ▁a ▁ 1 9 1 5 ▁German ▁two - se at ▁mon op lane ▁ ▁N F W ▁E . I , ▁a ▁ 1 9 1 7 ▁German ▁mon op lane ▁f ighter ▁▁▁ ▁Pf al z ▁E . I , ▁a ▁Mor