Typical Civil Engine Rating System. SOT (turbine entry temperature) vs. intake temperature.
<a href="https://en.wikipedia.org/wiki/User:Burbank" class="extiw" title="wikipedia:User:Burbank">Burbank</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>
30 October 2005 (original upload date)
<span class="int-own-work" lang="en">Own work</span>