During World War II and in response to the war ministry's directives, aircraft manufacturers had to constantly try and improve the engine power as well as the range of their aircraft – especially the bombers. The pressure to increase power and range happened with both – the allied forces and Nazi Germany. So how does the presence of an EGT probe and the Exhaust Gas Temperature display unit (EGT) help improve aircraft power, range and assist in precision engine monitoring?

This is how it worked:

If fuel is not efficiently burnt, it passes out of the engine and into the exhaust. Such fuel laden exhaust is termed “rich”. On the other hand, if there is more air-to-fuel in the exhaust, it is termed as “lean”. The aircraft engineers noticed a correlation between the exhaust gas tempera ... Read more »