The aim of this investigation is to analyze, for French, the behaviour of single as opposed to double (abutted) consonants, and also to examine the coordination of articulators in the production of heterorganic consonant sequences in French. X-ray and acoustic data are obtained, for two speakers (one female and one male) at two speaking rates. If configurational constraints have been proposed for articulatory modelling of vowels [1]; [2]; [3], those related to consonant production are lacking in the literature [4].