ɐ hˈɛlɪkˌɑːptɚ swˈɑːʃpleɪt ɪz ɐ pˈɛɹ ʌv plˈeɪts, wˈʌn ɹoʊtˈeɪɾɪŋ ænd wˈʌn fˈɪkst, ðæt ɑːɹ sˈɛntɚd ɔnðə mˈeɪn ɹˈoʊɾɚ ʃˈæft.
A helicopter swashplate is a pair of plates, one rotating and one fixed, that are centered on the main rotor shaft.