Mō ngā kaiwhakahaere o ngā rua kohatu e pāngia ana e te pakeketanga mutunga kore o te papa puia, ehara te pakaru o ngā taputapu i te kōwhiringa - he utu ia rā. Hei wheketere e whakatapua ana ki te hangarau me te hanga mīhini keri toka anake, i hangaia e mātou teYT29A Wiri Toka Waewaemō tēnei pakanga tonu. He mīhini pakari tēnei, he wiri hau-pūmau, i hangaia mō te keri poutū, piko rānei i roto i ngā hanganga toka waenga-pakeke ki te mārō. Ka whakakotahi i te tinana māmā engari he pakari me te ponowaewae hauhei tautoko me te whāngai, e āhei ai te kaiwhakahaere kotahi ki te whakahaere i te whakatūnga me te keri i runga i te whai hua. He māmā noa te whakahaere: hono atu ki tētahi pūwero hau ahumahi paerewa, whakauhia te mīhini ki te mata toka mā te whakamahi i te waewae ka taea te toro atu, ka whakamahi i te pūwero hei tīmata i te mahi patu tika e pana ana i te mata keri ki mua.

I roto i ngā rua kohatu basalt, ina tere ake te pakaru o te toka nā te āhua whakakoi, ka rerekē teYT29Ahe mea ine te hanga. I mua i tōna whakatinanatanga, he maha ngā wā ka raru ngā mahi ki ngā aukati maha. Ka tere te ngoikore o ngā maitai keri, ā, ka hinga ngā wāhanga o roto pērā i ngā piston me ngā rango i roto i ngā taputapu iti ake i te ahotea pānga nui tonu, ka arahi ki ngā pakaru wawe, ngā matapihi tiaki roa, me te putanga o ia rā e kore e taea te matapae. Mai i te whakaurunga o te YT29A, kua mārama te rerekētanga. E whakaatu ana ngā keri i te roanga nui o ngā wā ratonga. Ko ngā wāhanga o roto o te keri kua whakapakeketia motuhake - kua hangaia me te rongoatia kia tino pakari - ka tu atu ki te papara nui, ka whakaiti nui i te auau o ngā pakaru. Ko te tikanga o tēnei pakari he roa ake te ora o te moka me te iti ake o ngā whakakapinga. Inaianei he iti ake ngā aukati kore i whakamaheretia mō ngā kaiwhakahaere, me te pupuri i te tere keri pumau. Ko te hua he whakapainga kitea i roto i te inenga o ia rā e kerihia ana, he hekenga o ngā utu whakahaere ia haora nā te iti o te whakamahinga o ngā wāhanga, ā, i te mutunga, he kaupapa whakaputa e taea te matapae me te whai hua. Ehara i te mea he whakapainga taputapu noa iho tēnei; he nekehanga whakahaere ki te pono i roto i tētahi o ngā taiao tino wero o te keri.

Ko te kaupapa matua o tēnei mahi kei roto i tētahi whakaaro hoahoa āta whakaarohia e aro ana ki te roa, kaua ki te whakatakotoranga noa iho. Kei roto i ia waeine YT29A tētahi pūnaha takirere whakapakari e whakarite ana i te tukunga hiko ōrite, ā, e tiaki ana i te poke e peia ana e te hau, he take noa i roto i ngā āhuatanga o te rua kohatu puehu. He mea mīhini te rango me te piston mai i ngā koranu kounga teitei, ā, ka tukuna he tukanga maimoatanga wera maha-wāhanga, ka hanga he pakeke mata moroiti e ātete ana ki te kakahu whakakoi i puta mai i te puehu basalt. Hei tāpiri, kei roto i tētahi wāhanga hiri te motuka hau me te tikanga hurihuri, e whakaiti ana i te urunga mai o ngā matūriki e huri ana i ngā wāhanga neke. Mā tēnei arotahi hangarau ka whakaitihia te waku ā-roto, e whakarite ana kia whakawhitia pai te mana o te mīhini ki te mata keri kaua e moumou hei kakahu ā-roto. Mō te kaiwhakahaere, ko te tikanga o tēnei ka mau tonu te kaha o te patu i te nekehanga katoa, ka taea ai te tere ake o te urunga ahakoa he rerekē ngā āhuatanga o te toka. He mahi nui anō hoki te hoahoa o waho kua māmā ake; me te iti ake o ngā putanga o waho me te āhua kua āta whakaritea, he iti ake te tūponotanga o te keri ki te mau me te kino i te wā e neke ana i runga i ngā paepae rua kohatu taratara. Mā tēnei huinga o te kaha ā-roto me te whaihua o waho ka kore e ora noa te YT29A i te taiao papa-papa - engari ka noho tonu hei rangatira mōna, i muri i te nekehanga. Ko te putanga whakamutunga he mīhini e huri ana i te pokapū utu kakahu nui hei tauira o te hua ka taea te matapae, e whakaatu ana i roto i te keri kohatu taumaha, ko ngā taputapu motuhake tika te tino painga mō te whai hua.