Ka taea te whakatuwhera i te haruru rerekē o te peera wehe i ngā wā katoa?
Mena ka pāngia te taraiwa noa o te motuka e te haruru rerekē o te peera wehewehe, me tiaki wawe, ā, kāore e taea te haere tonu. Ina puta he tangi rerekē o te peera wehewehe, ka taea te takahi mārire i te pētera mamau o te motuka. Ina pā te pētera mamau me te rīpene wehewehe, ka kitea he tangi rerekē, e tohu ana he hapa te peera wehewehe. Ka pāngia te peera wehewehe e te kawenga axial me te kaha centrifugal o te peera kawenga pānga i roto i te tukanga taraiwa o te motuka, ā, ka puta he taipana torsional. He ngoikore te āhua mahi o te peera wehewehe i roto i te mamau, ā, he tere te waku me te pāmahana mahi tino teitei. Nā te ngoikore o ngā āhuatanga whakahinuhinu, kāore i te nui te taiao whakamatao, nō reira ka ngāwari te peera wehewehe ki te pakaru. Ko ngā take mō te pakaru o ngā peera whakawhiti ko te teitei rawa o te pāmahana mahi, ka mutu te wera o ngā peera wehewehe, ko te waku rānei o te kore hinu whakahinuhinu ka nui rawa te kakahu o ngā peera wehewehe. Hei tāpiri, ki te kore e maeneene te whakarerekētanga o te rīpene wehewehe, ki te kore rānei te puna reka o muri e pai ana te mahi, ka pā kino anō hoki ki te peera wehewehe.
