tə meɪntˈeɪn ɐ kˈɑːnstənt spˈiːd, ðɪ ˈɛndʒɪnz tˈeɪk ˌoʊvɚɹ ˌɔːɾəmˈæɾɪkli wɛn ðə wˈɪnd dˈaɪz dˈaʊn, ænd ðeɪ stˈɑːp kəmplˈiːtli wɛn ðə wˈɪnd ɪz ʌv səfˈɪʃənt stɹˈɛŋθ wɛn blˈoʊɪŋ ɪnðə ɹˈaɪt dᵻɹˈɛkʃən.
To maintain a constant speed, the engines take over automatically when the wind dies down, and they stop completely when the wind is of sufficient strength when blowing in the right direction.