Alliedsignal Inc.

Rangnath A Kotwal

Henry J Ruzicka

William F Waterman

Jacob S Obayomi

A turboprop engine has in flow series arrangement a crescent shaped inlet, an annular plenum, a compressor, a combustor, and a turbine. The plenum is defined by inner and outer annular walls. A support member referred to as a 'boat tail' extends between the walls and is circumferentially positioned 180 degrees from the inlet. A strake extends downstream from the support member and is angled in a direction opposite the rotational direction of the compressor. Thus air entering the engine with either positive or negative swirl is forced to enter the impeller with negative swirl.

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Phoenix, AZ, United States of America

Rangnath A Kotwal