Ho latela radius ea eona ea ho tloha moo, ho na le liqhobosheane tse telele tsa radius le bokhutšoanyane radius. Nako e telele radius e bua ka radius ea eona ea ho ts'oaroa e lekanang le makhetlo a 1.5 bophara ba pompo, ke hore, r = 1.5d; r = 1.5D; Sebaka se khuts'oane radius se bolela hore radius ea eona ea ho ts'oaroa e lekana le bophara ba pipi, mme, r = 1.0d.