ʻO kahi lau ka uhiʻana (kahi'āpana liʻiliʻi, semi-spir i luna o ka huila a me nā kaʻa kaʻaʻoleʻole. Ma ka laina me nā dynamics wai, ho'ēmi i ka paleʻana o ka makani, e holo maikaʻi i ke kaʻa.
Ua kapaʻia kekahi lau Aia nā papa lau ma waho o ke kino o ka huila. ʻO ka hana e hōʻemi i ka paleʻana o ka makani e like me nā mea e like me nā mea e like me nā mea e like ai, no laila e holo mālie ana ke kaʻa. Wahi a ke kūlana hoʻonohonoho, hiki iā ia ke hoʻokaʻawale i loko o ka papa lau mua a me ka pā lau lau o hope. Hoʻonohoʻia ka papa lau mua ma luna o ka huila mua. No ka mea,ʻo ka huila mua ka hana o ka hoʻokele, pono ia e hōʻoia i ka palena palena palena loa i ka wā e pau ai ka huila mua. Ua hoʻokuʻuʻia ka lau hope mai ka wāwae wili o ka huila, akā no nā kumu o Aerodynamic,ʻo ia ka lau hope o ka paleʻana i waho.
ʻO ka lua, hiki i ka papa lau mua ke hana i ke kaʻina hana hoʻokele mua, pale i ka huila a me nā pōʻino i ka pahū a me ka hōʻino i ka huila. No laila, koiʻia nā huahana i hoʻohanaʻia e loaʻa i keʻano o ke kū'ēʻana a me ke kaʻina hana o ka wā. ʻO ka uku mua o nā kaʻa he nui i hanaʻia i nā mea waiwai i hanaʻia me kekahi elasticity.
