The two failed KSLV-I launch vehicles were based on the Universal Rocket Module, the first stage of the Russian Angara rocket, combined with a solid-fueled second stage built by South Korea.
De to mislykkede KSLV-I-lanceringskøretøjer var baseret på Universal Rocket Module, den første fase af den russiske Angara-raket, kombineret med en solid-fueled anden fase bygget af Sydkorea.