ʌnˈɛbaɪ hæd tˈuː hˌɔːɹɪzˈɔntəl dˈʌbəlɛkspˈænʃən stˈiːm ˈɛndʒɪnz, ˈiːtʃ dɹˈaɪvɪŋ wˈʌn ʃˈæft, jˈuːzɪŋ stˈiːm səplˈaɪd baɪ sˈɪks sɪlˈɪndɹɪkəl bˈɔɪlɚz.
Unebi had two horizontal double-expansion steam engines, each driving one shaft, using steam supplied by six cylindrical boilers.