FlightAware Discussions

why do jet engines 'pulse'

My understanding of how a jet engine works is that the airflow is continuous, and the output/exhaust/thrust is therefore continuous. Here’s a photo of a jet that appears to have ‘pulsing’ thrust:
flightaware.com/photos/view/6051 … ate/page/2
Can anyone explain this for me please.

Not really a pulse, but the flame from the afterburner. Just the way the flames look.

That’s not the engine pulsing, those are shock diamonds in the (very supersonic) engine exhaust. They don’t move relative to the airplane, they stay in the same position (until throttle setting/airspeed change).

en.wikipedia.org/wiki/Shock_diamond

Where can I get one of those? :smiling_imp:

At last! The rookie knocks one out of the park!!! :laughing: :laughing: :laughing: