 Nyorera kupfuurira kweiyi ndima - Zvose Intersonics uye ServoDrive chikamu chakakura pakati pemakore e1980. Chinhu chakachinja zvikuru kwaiva kuparara kwechikepe chinonzi Space Shuttle chinonzi Challengermuna 1986, iyo yakaderedza mafungiro nemamiriro ezvinhu ebhizimisi muindasitiri yemuchadenga, uye yakaunza kunonoka uye kukanzurwa kwezvibvumirano. 