[en] Collective characteristics are studied of hadrons produced in beam fragmentation of non-single-diffractive π⁺p-interactions at 250 GeV/c. An attempt is made to obtain experimental information on the properties of leading cluster production and fragementation. On average, the leading cluster carries 0.8±0.1 of the incident momentum, so that the mean value of the inelasticity coefficient of < k>=0.2±0.1 is significantly smaller than that deduced from leading single hadron spectra. The momentum transfer distribution shows that non-single-diffractive processes are less peripheral than diffraction dissociation. The analysis of thrust and sphericity shows jet-like structure of pion fragmentation, that of the charge flow an average forward charge of < Q_f>=0.45±0.04 in agreement with the average charge of the beam valence quarks. Our data are compared to diffraction dissociation and to the Fritiof model. (orig.)