▁used ▁in ▁contin ental ▁Europe . ▁In ▁the ▁UK , ▁the ▁term ▁is ▁B iss ell ▁tr uck .< ref ▁name =" IN WR S - 1 "> [ http :// www . ln w rs . org . uk / Good s Loc os / Loc o 0 8 . php ▁Sp ell ings "]; ▁</ ref > ▁ ▁Conserv ative ▁locomot ive ▁build ers ▁in ▁B iss ell ' s ▁native ▁United ▁States ▁did ▁not ▁take ▁to ▁the ▁new ▁design , ▁and ▁it ▁was ▁not ▁implemented ▁until ▁after ▁the ▁Eastern ▁Count ies ▁Railway ▁in ▁the ▁United ▁Kingdom ▁fitted ▁one ▁to ▁their ▁No . ▁ 2 4 8 ▁in ▁ 1 8 5 9 . ▁ ▁P ony ▁tr uck s ▁of ▁similar ▁design ▁became ▁very ▁popular ▁on ▁British ▁locomot ives ▁there after . ▁ ▁Properties ▁and ▁use ▁ ▁A ▁locomot ive ▁with ▁a ▁B iss ell ▁ax le ▁is ▁able ▁to ▁both ▁turn ▁about ▁its ▁vertical ▁axis ▁and ▁swing ▁radial ly ▁to ▁the ▁side , ▁movements ▁advantage ous ▁to ▁steam ▁locomot ives ▁because ▁their ▁position ▁on ▁the ▁track ▁is ▁dict ated ▁by ▁the ▁driving ▁or ▁couple d ▁whe els . ▁ ▁The ▁B iss el ▁tr uck ▁also ▁helps ▁stabil ize ▁a ▁train ▁in ▁a ▁turn , ▁where ▁cent rif ug al ▁force ▁causes ▁a ▁locomot ive ▁to ▁lean ▁away ▁from ▁the ▁track . ▁ ▁It ▁features ▁a ▁pair ▁of ▁incl ined ▁plan es ▁which ▁mate ▁with ▁an ▁oppos ing ▁set ▁on ▁the ▁engine ' s ▁frame ▁where ▁the ▁two ▁join