Abstract: The infrared energy detection device is a small, battery powered radiometer which measures IR energy emitted from an engine exhaust device, compares it with programmed energy levels, and displays whether the measured level falls within acceptable limits. It is calibrated against engine torque; and, by means of green and red lights, indicates the level of IR emissions. If emissions are below a predetermined level, a green light will be illuminated. Conversely, if emissions are higher than design levels, a red light will be illuminated indicating degraded performance of the engine IR suppresor. In addition to the green and red light indication, a digital display of IR intensity is also provided.

Abstract: A radiation suppressor for exhaust turbine or other engines which signifitly reduces the lock-on range of infrared seeking missiles is provided. Engine exhaust gases are the sole power source for driving an exhaust turbine which includes a self-contained turbo-fan assembly and a surrounding plenum-shroud assembly both of which are structurally supported by the aircraft or other vehicle-cooling air duct assembly. The turbo-fan assembly comprises a turbine wheel having a top or outer fan for providing both hot metal and plume cooling air and a central centrifugal blower to partially cool the hollow turbine blades. The duct assembly is combined with ambient air passages to distribute plume cooling air, while a plenum-shroud assembly which surrounds these assemblies includes internally cooled radial vanes disposed in a turbine shroud as well as an outer fairing having flow passages for cooling air.