Some visualisation features of processes in stretched ARC discharge in the free air aerosphere V. O. German, A. P. Glinov, A. P. Golovin, P. V. Kozlov, G. A. Lyubimov Institute of Mechanics, Lomonosov Moscow State University 1 Michurinsky av., Moscow, 119192, Russia E-mail: krestytroitsk@mail.ru The experimental research of processes in the low-temperature plasma of quasi-stationary arc discharges in an air environment at the one bar pressure between graphitized electrodes is conducted. <...> Along with conventional (arc-shape) form of the discharge, it was studied also other regimes of a current passing: diffuse (proportioned) and diffuse-pinched. <...> Processes of a contraction, foliation and a shunting are considered. <...> Modes of the current fluctuations, caused by interaction of cathode and anode streams, and occurrence of plasma jets and firm particles with locally hot anode surfaces are found out. <...> PACS: 52.80.Mg Keywords: electric arc, high speed shooting, video- and infra-red bands of wave lengths, plasma structure, gas-dust clouds, contraction, foliation, shunting. <...>