<div class="htmlview paragraph">This paper develops the definition of a maximum temperature engine (MTE) and the particular freedom that this capability will provide to propulsion systems of some future aircraft. The MTE concept is presented not as a panacea for all propulsion ills but, properly applied to aircraft applications that can utilize its specific capabilities, as holding the promise of significant improvements in aircraft performance levels. An overview of some of these potential benefits is given by a comparison of one MTE with current development state-of-the-art engines and an indication of the time that will be required to demonstrate the payoffs and develop an MTE to the state of full utility is delineated.</div>