▁be ▁of ▁a ▁limited ▁length ▁( in ▁the ▁direction ▁of ▁travel , ▁i . e . ▁circum fer ential ) ▁so ▁multiple ▁p ads ▁are ▁needed ▁rather ▁than ▁a ▁single ▁ring . ▁No ▁lub ric ation ▁p ump ▁is ▁needed : ▁the ▁rotation ▁of ▁the ▁sh aft ▁itself ▁is ▁sufficient . ▁ ▁The ▁need ▁for ▁an ▁efficient ▁thrust ▁block ▁became ▁even ▁more ▁important ▁with ▁the ▁advent ▁of ▁steam ▁tur b ines , ▁with ▁their ▁higher ▁prop eller ▁spe eds . ▁Despite ▁this , ▁there ▁was ▁some ▁rel uct ance ▁to ▁adopt ▁them ▁in ▁their ▁hom eland , ▁until ▁the ▁discovery ▁that ▁World ▁War ▁I ▁U - bo ats ▁were ▁using ▁them . ▁After ▁this ▁they ▁were ▁soon ▁adopted ▁widely . ▁The ▁large ▁single ▁pad ▁illustrated ▁is ▁a ▁model ▁of ▁one ▁used ▁in ▁the ▁battle c ru iser ▁, ▁once ▁the ▁pride ▁of ▁the ▁Royal ▁Navy . ▁ ▁Mich ell ▁Bear ings ▁continue ▁in ▁production ▁today ▁under ▁the ▁same ▁name , ▁first ▁as ▁part ▁of ▁Roll s - Ro y ce ▁marine ▁systems ., ▁since ▁ 2 0 1 6 ▁as ▁part ▁of ▁British ▁Eng ines ▁Group . ▁ ▁References ▁▁ ▁Category : Mar ine ▁prop ulsion ▁Category : B ear ings ▁( me chan ical ) <0x0A> </s> ▁K ah sh ur - e ▁Sof la ▁( , ▁also ▁Roman ized ▁as ▁K ah sh ū r - e ▁Sof lá ; ▁also ▁known ▁as ▁K ah sh ū r - e ▁P ā ’ ī n ) ▁is ▁a ▁village ▁in ▁How