nɔːɹθˈʌmbɚlənd hæd ɐ tˈuːsˈɪlɪndɚ tɹˈʌŋk stˈiːm ˈɛndʒɪn, mˌeɪd baɪ dʒˈɑːn pˈɛn ænd sˈʌnz, dɹˈaɪvɪŋ ɐ sˈɪŋɡəl pɹəpˈɛlɚ jˈuːzɪŋ stˈiːm pɹəvˈaɪdᵻd baɪ tˈɛn ɹɛktˈæŋɡjʊlɚ fˈaɪɚtˈuːb bˈɔɪlɚz.
Northumberland had a two-cylinder trunk steam engine, made by John Penn and Sons, driving a single propeller using steam provided by 10 rectangular fire-tube boilers.