Please excuse my naievety, but i was wondering what the initial differences are between the jet engines used by airliners and fighter jets are?
I understand that the Turbofan engine used on airliners produces propulsion from the gas turbine exhast and also through the bypass air caused by the fan, so surely a fighter jet engine's work the same way? But why does only the fighter jet's engine produce the super hot exhaust flame which can be easily seen (not during afterburn)?
This question has left me pondering for a while now, is it simply the difference between a economical and highly tuned engine?
Any words of wisdom would be great.
Fray