▁two ▁more ▁idle ▁ax les ▁from ▁the ▁beginning . ▁In ▁contrast ▁to ▁the ▁Be ▁ 4 / 6 ▁bog ie ▁locomot ive ▁the ▁A e ▁ 4 / 8 ▁was ▁built ▁as ▁a ▁frame ▁locomot ive ▁with ▁a ▁double ▁art ic ulated ▁body . ▁This ▁art ic ulated ▁layout ▁allowed ▁good ▁operation ▁on ▁curves , ▁even ▁with ▁the ▁heavy , ▁frame ▁mounted ▁mot ors . ▁The ▁locomot ive ▁was ▁nick named ▁T atz el w urm ▁because ▁of ▁this ▁layout . ▁ ▁The ▁locomot ive ▁consisted ▁of ▁three ▁bodies ▁connected ▁by ▁g ait ers , ▁the ▁two ▁outer ▁bodies ▁with ▁short ▁cabin ets . ▁The ▁ch ass is ▁consisted ▁of ▁two ▁short - cou ple d ▁frames . ▁Each ▁of ▁them ▁contained ▁two ▁drive ▁ax les , ▁one ▁leading ▁B iss el ▁ax le ▁and ▁one ▁trailing ▁Adams ▁ax le . ▁The ▁frames ▁were ▁– ▁as ▁with ▁the ▁Be ▁ 4 / 7 ▁– ▁couple d ▁directly ▁by ▁a ▁connecting ▁rod ▁and ▁two ▁auxili ary ▁cou pl ers . ▁The ▁outer ▁bodies ▁were ▁fixed ▁to ▁the ▁frames , ▁while ▁the ▁centre ▁body ▁lay ▁on ▁a ▁brid ging ▁sl ab , ▁which ▁did ▁not ▁transfer ▁any ▁tract ive ▁or ▁pressure ▁forces . ▁The ▁brid ging ▁sl ab ▁rest ed ▁on ▁the ▁outer ▁frames ▁over ▁a ▁pivot , ▁and ▁via ▁horizontal ▁spr ings ▁between ▁the ▁inner ▁drive ▁ax les ▁and ▁the ▁Adams ▁ax les . ▁ ▁The ▁transform er ▁was ▁mounted ▁in ▁the ▁centre ▁part ▁of ▁the ▁locomot ive . ▁For ▁removing ▁the ▁transform er