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Using the WiFeS integral field spectrograph, we have undertaken a series ofobservations of star-forming galaxies in Compact Groups. In this first paperdedicated to the project, we present the analysis of the spiral galaxy NGC838,a member of the Hickson Compact Group 16, and of its galactic wind. Ourobservations reveal that the wind forms an asymmetric, bipolar, rotatingstructure, powered by a nuclear starburst. Emission line ratio diagnosticsindicate that photoionization is the dominant excitation mechanism at the baseof the wind. Mixing from slow shocks (up to 20%) increases further out alongthe outflow axis. The asymmetry of the wind is most likely caused by one of thetwo lobes of the wind bubble bursting out of its HI envelope, as indicated byline ratios and radial velocity maps. The characteristics of this galactic windsuggest that it is caught early (a few Myr) in the wind evolution sequence. Thewind is also quite different to the galactic wind in the partner galaxy NGC839which contains a symmetric, shock-excited wind. Assuming that both galaxieshave similar interaction histories, the two different winds must be aconsequence of the intrinsic properties of NGC838 and NGC839 and theirstarbursts.

Galaxy Interactions in Compact Groups I : The Galactic Winds of HCG16