ðeɪ ɑːɹ pɹˈɑːbəbli bˈɛst nˈoʊn fɔːɹ ðɛɹ jˈuːs ɪn ɹˈɑːkɪtpˈaʊɚd kˈɑːɹz ænd mˈoʊɾɚsˌaɪkəlz, ænd ðeɪ ɑːɹ ðə tˈaɪp jˈuːzd ɪn ˈiːəlˌɪpaɪl.
They are probably best known for their use in rocket-powered cars and motorcycles, and they are the type used in aeolipile.