PPRuNe Forums - View Single Post - Afterburner Ignition Delays at Altitude
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Old 6th May 2011, 20:12
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Join Date: Jun 2009
Location: florida
Age: 81
Posts: 1,611
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Afterburner/augmentor sources

Salute!

'bird never flew the motors with the "hard light" such as the J-57 and J-75, and I did. They used a "hot streak ignition" that injected a bunch of gas up by the turbine outlet stage which burned very rich and then ignited the massive amount of JP-4 being sprayed by the afterburner ring(s). The exhaust nozzle opened before final ignition, so we had a brief lull, then a BOOOMMMM!!! Unless you went to an airshow or flightline before 1984 ( when the F-105 was retired), you prolly never saw/heard that.

The J-79 and later motors did not do this, plus they had variable stages of augmentation and neat nozzle controls.

Best bet is to go the f-16.net and look up "TEG" on the user list, then send a private message. His callsign stands for "That Engine Guy", and he has had more experience with more engines and prolly knows more than anyone here on Pprune. No offense to all you airline folks.

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