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Interesting Compressor Surge Picture  
User currently offlineCorey07850 From United States of America, joined Feb 2004, 2537 posts, RR: 4
Posted (10 years 7 months 3 weeks 1 day 5 hours ago) and read 6780 times:

The image is a little big for the forum, so here's a direct link...Pretty neat shot if you ask me


6 replies: All unread, jump to last
User currently offlineSATL382G From , joined Dec 1969, posts, RR:
Reply 1, posted (10 years 7 months 3 weeks 1 day 3 hours ago) and read 6752 times:

Looks like the phabulous phantom has some phire phlowing out the phront end!!  

Interesting pix.

Odd though that the fire does not illuminate the forward fuselage or reflect off the forward canopy.

[Edited 2005-10-12 03:24:32]

User currently offlineDC8FriendShip From United States of America, joined Apr 2005, 243 posts, RR: 2
Reply 2, posted (10 years 7 months 1 week 4 days 15 hours ago) and read 6266 times:

Interesting. I didn't know compressor surges shot flames out the front. Seems like the engine would have a massive overtemp condition.

Come fly the Friendly Skies of United
User currently offlineAirfoilsguy From , joined Dec 1969, posts, RR:
Reply 3, posted (10 years 7 months 1 week 4 days 9 hours ago) and read 6167 times:

I hate to say it but the photo looks like a fake. First off there is no fire coming out the exhaust. Second, in order for that much flame to blow out the intake at speed you would need a massive explosion, in the end bringing down the plane.

User currently offlineFr8mech From United States of America, joined Sep 2005, 6711 posts, RR: 16
Reply 4, posted (10 years 7 months 1 week 4 days 8 hours ago) and read 6153 times:

I won't comment as to whether this photo is a fake or not, but flames out the front of engine are common during a stall, especially low-bypass engines.

I've seen of plenty of times on the old JT8's installed on the B727. Made a couple stall myself.

The flame is not the result of an explosion, it is the result of the flame front traveling forward through the engine after the airflow through/around the compressor has been disturbed.

When seconds count...the police are minutes away.
User currently offlineDash 80 From United States of America, joined Nov 2001, 309 posts, RR: 1
Reply 5, posted (10 years 7 months 1 week 4 days 8 hours ago) and read 6144 times:

Fr8mech is right. The so called "stall" of airflow through the compressor allows hot gasses from the combustor to travel right out the front of the engine. A normal stable flow of air makes the gasses travel out through the rear of the engine. The overtemp problem is an issue as these conditions were not intended for the compressor and can cause suitable damage to the engine as a whole.


...where the rubber hits the runway...
User currently offlineSLCPilot From United States of America, joined Aug 2003, 635 posts, RR: 2
Reply 6, posted (10 years 7 months 1 week 3 days 8 hours ago) and read 5938 times:

Here's another vote for the picture not being "fake". The following is a quote from a former Thunderbird pilot....

Now, F-100 pilots are accustomed to loud noises. Even in the best of circumstances, the afterburner can ' bang ' pretty hard when it lights off. It's also fairly common for the engine compressor to stall, sometimes forcing a violent cough of rejected air back up the intake. Flame belches out the oval nose--which will definitely wake you up at night--and the shock can kick your feet off the rudder pedals. Any F-100 pilot who hears a loud " BANG ! " automatically thinks, "compressor stall," and unloads the jet to get air traveling down the intake in the right direction.

SO, INSTINCTIVELY, the explosion causes me to relax stick-pressure to unload the airplane. By now, I'm fully into one of those fast-forward mental exercises where seasons compress into seconds, the leaves changing color while you watch. I move the stick forward lethargically, even having time to think, "That's no compressor stall ! ! "

Anyway, you can read the full account of the F-100 beakup here if you want.



I don't like to be fueled by anger, I don't like to be fooled by lust...
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