 Nyorai kupfuurira kweiyi ndima - Kuongorora kwakawana kuti mugadziri wemotokari dzeUA1206, Chemical Systems Division yeUnited Technologies, akanga akanganwa chaizvoizvo matanho akakodzera okudzora unhu. Nemhaka yepurogiramu yeShuttle, kudiwa kwemotokari dzinotakura zvinhu ELVs kwakaderedzwa zvikuru mukati memakore e1980 uye vagadziri vakanga vachideredza mari, vachidonhedza vashandi vehunyanzvi, uye vachigadzirira kubvisa ELVs. Zvisinei, njodzi yeChallengeryakasimbisazve ELVs uye yaizoona kuwedzera kukuru kweTitan IV purogiramu iri kuuya, iyo yakatanga kurongerwa kungotanga gumi chete. 