Air cleaners for mobile gas turbines always present a space problem. For compactness, a compromise in some phase of collector performance may be desirable. The collector must reduce the compressor wear problem sufficiently to make it economically justifiable. An inertial separator such as the Dust Louvre* appears to be suitable for this application. Flexibility in unit size is unlimited, and it can be made to fit a complex, confined space cube. The dust louver** is basically a compact self-cleaning, inertial type dust collector that will effectively handle large volumes of air with low pressure losses and adequate dust separation.