Aluminum yana ko'ina cewa ko dai tsarin nauyi mai nauyi ko babban zafin jiki da wutar lantarki ana buƙata. Wasannin wasan motsa jiki na yau da kullun yana da shingen silinda na aluminium, kai, da crankcases, da welded chassis na aluminium da swingarm. A cikin injin, mahimman aikace-aikacen aluminium shine pistons, waɗanda ta hanyar gudanar da zafi sosai suna iya tsira daga yanayin zafi na konewa sama da inda suke narkewa. Tafukan, masu sanyaya da radiators na mai, levers na hannu da braket ɗin su, saman da (sau da yawa) rawanin cokali mai yatsa, manyan bututun cokali mai yatsa (a cikin cokali mai yatsa USD), birki calipers, da manyan silinda su ma aluminum.

Dukkanmu mun zuba ido cikin sha'awa ga wani chassis na aluminium wanda welds ɗinsa yayi kama da faɗuwar tarin guntun karta. Wasu daga cikin waɗannan chassis da swingams, irin su na masu tseren bugun jini biyu na Aprilia 250, ayyukan fasaha ne masu kyau.

Aluminum za a iya haɗawa da zafi-biyya ga ƙarfi fiye da na m karfe (60,000 psi tensile), duk da haka mafi alloys inji sauri da kuma sauƙi. Hakanan ana iya yin jifa, ƙirƙira, ko fitar da aluminum (wanda shine yadda ake yin wasu katako na gefen chassis). Ƙarfin wutar lantarki na Aluminum yana sa walƙarsa yana buƙatar amperage mai yawa, kuma ƙarfe mai zafi dole ne a kiyaye shi daga iskar oxygen ta hanyar inert-gas garkuwa (TIG ko heli-arc).

Ko da yake aluminum yana buƙatar wutar lantarki mai yawa don samun nasara daga ma'adinan bauxite, da zarar ya kasance a cikin nau'i na ƙarfe, yana da ɗan kuɗi don sake yin amfani da shi kuma ba ya ɓacewa ga tsatsa, kamar yadda karfe zai iya zama.

Waɗanda suka fara kera injinan babur cikin sauri sun karɓi sabon ƙarfen na wancan lokacin don akwatuna, wanda in ba haka ba zai zama ƙarfen simintin ƙarfe wanda ya kusan sau uku fiye da haka. Tsaftataccen aluminum yana da laushi sosai—Na tuna fushin mahaifiyata game da yadda mahaifina ya yi amfani da tukunyar tukunyar jirgi guda 1,100 a matsayin ingantacciyar tarkon BB: Kasansa ya zama tarin dimples.

Ba da daɗewa ba aka gano ƙarin ƙarfi na gawa mai sauƙi tare da jan ƙarfe, kuma irin wannan gami ne majagaba WO Bentley ya yi amfani da pistons na gwaji na aluminum kafin yakin duniya na. A gwajin baya-da-baya a kan pistons-iron sannan suka mamaye, Bentley's farko-gwada pistons aluminium nan da nan ya haɓaka ƙarfi. Sun yi sanyi mai sanyi, sun zafafa cakuda man-iska mai shigowa ƙasa kaɗan, kuma sun adana ƙarin yawansa. A yau, ana amfani da pistons na aluminum a duk duniya a cikin injunan motoci da babur.

Har zuwa zuwan jirgin saman Boeing na carbon-fiber ƙarfafa-roba 787 jirgin sama, shi ne ainihin gaskiyar jirgin sama cewa kusan kowane jirgin da babu komai a cikin nauyi ya kashi 60 na aluminum. Duban ma'aunin dangi da ƙarfin aluminum da ƙarfe, wannan da farko yana da alama. Haka ne, aluminum yana da nauyin 35 bisa dari kawai kamar karfe, girma don girma, amma ƙananan ƙarfe masu ƙarfi sun fi ƙarfin aƙalla sau uku fiye da ƙarfin aluminum. Me ya sa ba za a kera jiragen sama daga bakin karfe ba?

Ya sauko zuwa juriya ga ƙulla kwatankwacin tsarin aluminum da ƙarfe. Idan muka fara da aluminum da bututun ƙarfe masu nauyi iri ɗaya kowace ƙafa, kuma muka rage kaurin bangon, bututun ƙarfe ya fara ɗaurewa da farko saboda kayansa, kasancewar kashi ɗaya bisa uku ne kawai kamar aluminum, yana da ƙarancin ƙarfin ƙarfin gwiwa.

A cikin shekarun 1970s, na yi aiki tare da Frank Camillieri mai gini. Lokacin da na tambaye shi dalilin da ya sa ba mu yi amfani da bututun ƙarfe mai girman diamita na bangon sirara don yin firam masu ƙarfi da ƙarfi, sai ya ce, “Lokacin da kuka yi haka, za ku ga dole ne ku ƙara ɗimbin abubuwa zuwa kaya kamar injin hawa zuwa ka kiyaye su daga tsagewa, domin ceton nauyi ya bace.”

Kawasaki ya fara amfani da aluminium swingams akan kekunan MX na masana'anta a farkon 1970s; sauran suka bi su. Sannan a cikin 1980, Yamaha ya sanya Kenny Roberts a kan keken GP mai bugun jini guda 500 wanda aka kera firam ɗinsa daga bututun alumini mai faɗin yanki mai murabba'i. Gwajin ƙira da yawa ya zama dole, amma a ƙarshe, ta yin amfani da ra'ayoyin injiniyan ɗan Spain Antonio Cobas, Yamaha's GP firam ɗin tseren hanya sun samo asali zuwa manyan tagwayen katako na aluminum na yau.

Lallai akwai nasara chassis na wasu nau'ikan - Ducati's karfe-tube "trellis" na daya, da John Britten's "fata da ƙasusuwa" carbon-fiber chassis na farkon 1990s. Amma twin aluminum beam chassis sun zama rinjaye a yau. Ina da kwarin gwiwar cewa za a iya yin chassis ɗin da aka ƙera daga plywood, in dai yana da ɗorewa mai ɗorewa da kuma tabbataccen joometry da aka saba.

Wani muhimmin bambanci tsakanin karfe da aluminum shine karfe yana da abin da ake kira iyakacin gajiya: matakin damuwa na aiki a ƙasa wanda tsawon rayuwar ɓangaren ba shi da iyaka. Yawancin allunan aluminium ba su da iyakacin gajiya, wanda shine dalilin da yasa ake raya firam ɗin iska na aluminium don adadin sa'o'i da aka tsara. A ƙasa da wannan iyaka, karfe yana gafarta mana laifuffukan mu, amma aluminum yana tunawa da duk zagi a cikin nau'i na lalacewa na gajiya na ciki.

Kyawawan GP chassis na shekarun 1990 ba zai taba zama tushen samar da yawa ba. Waɗancan chassis ɗin sun ƙunshi guntu-guntu waɗanda aka haɗa su daga injina, manne, da simintin aluminium. Ba wai kawai wannan hadaddun ba ne, amma yana buƙatar cewa dukkan allunan guda uku su kasance masu walƙiya tare. Welding yana kashe kuɗi da lokaci, koda kuwa mutum-mutumin da ke samarwa ya yi.

Fasahar da ta yi injuna masu nauyi huɗu masu nauyi a yau da kuma jefa chassis mai yuwuwa ita ce hanyoyin cike da ƙarancin rudani waɗanda ba sa shigar da fina-finai na aluminum oxide da ke fitowa nan take akan narkakken aluminum. Irin waɗannan fina-finai suna haifar da yankuna na rauni a cikin ƙarfe wanda, a baya, yana buƙatar simintin gyare-gyare don yin kauri sosai don samun isasshen ƙarfi. Sassan simintin gyare-gyare daga waɗannan sabbin matakai na iya zama mai sarƙaƙƙiya, duk da haka ana iya haɗa chassis na aluminum na yau tare da welds masu ƙididdigewa a hannu ɗaya. An kiyasta cewa sabbin hanyoyin yin simintin sun tanadi nauyin kilo 30 ko fiye a cikin kera babura.

Tare da nau'ikan karafa iri-iri, aluminium babban doki ne na wayewar ɗan adam, amma ya fi haka ga babura na zamani. Naman babur ne, a ko'ina ta yadda da kyar muke ganinsa ko sanin nawa aikin injin da muke binsa.