Gliding are discharges are the subject of renewed interest in applications
to a variety of chemical reactions. A gliding are creates a weakly ionized
gas 'string' between two horn-shaped electrodes. The reacting gas introduce
d at the electrode base blows the are string upwards. These devices can be
applied in industry mainly for decontamination and general gas treatment. W
e propose a simple model to describe the electrical properties of a bi-dime
nsional d.c. gliding are discharge. This model can be used to estimate char
acteristics of the power source (internal resistance r and voltage U-g) nec
essary for a particular application.