Just so we are on the same page, CHT stands for Cylinder Head Temperature and EGT stands for Exhaust Gas Temperature and in the case of this article, these refer to the aircraft engine cylinder and aircraft engine exhaust gases (same terminology is also used in high-performance cars).

Before we get on to the use of CHT and EGT gauges and monitors, we need to first understand CHT and EGT data. CHT and EGT provides information of two different things that is happening inside the aircraft engine. The former i.e. CHT data specifically points to the Otto cycle power stroke that happens before the exhaust valve opens, while EGT data pertains to the exhaust stroke after the exhaust valve opens.

CHT gauge or monitor measures heat energy wasted during the power stroke. At this stage, the cylinder is unde ... Read more »