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WARNING-- Hot Air Exhaust  
User currently offlineJamesbuk From United Kingdom, joined May 2005, 3968 posts, RR: 4
Posted (8 years 10 months 2 weeks 6 days 5 hours ago) and read 2712 times:

hi guys


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on this picture when you open it up look at the edges of the engine and roll your eyes round so it would be about 3oclock if it was a clock there is a vent and says
WARNING!! hot air exhaust
why would the air travel into the engine the back forwards in an engine to vent out

so my Q is what exacly is this vent for and its purpose


thanks guys

rgds --james--

EDIT-- change name appearance

[Edited 2005-12-16 19:14:44]


You cant have your cake and eat it... What the hells the point in having it then!!!
12 replies: All unread, jump to last
 
User currently offlineGrbld From Netherlands, joined Dec 2005, 353 posts, RR: 3
Reply 1, posted (8 years 10 months 2 weeks 6 days 5 hours ago) and read 2698 times:

This is probably the engine anti-ice outlet. Hot bleed air from the engine is channeled to the front and flows around the engine inlet to warm it up and shed any ice that may have accumulated on the inlet as well as prevent more ice from building up.

Grbld.


User currently offlineBlatantEcho From United States of America, joined Sep 2000, 1918 posts, RR: 1
Reply 2, posted (8 years 10 months 2 weeks 6 days 4 hours ago) and read 2674 times:

I thought that was the oil breather on the big GEs.


They're not handing trophies out today
User currently offlineFr8Mech From United States of America, joined Sep 2005, 5516 posts, RR: 14
Reply 3, posted (8 years 10 months 2 weeks 6 days 4 hours ago) and read 2667 times:

Quoting BlatantEcho (Reply 2):
thought that was the oil breather on the big GEs

Nope, nacelles anti-ice exhaust. The breather sits further back on the engine and it would be a whole lot of unnecessary tubing to run it forward.



When seconds count...the police are minutes away.
User currently offlineHAWK21M From India, joined Jan 2001, 31692 posts, RR: 56
Reply 4, posted (8 years 10 months 2 weeks 6 days 4 hours ago) and read 2655 times:

Quoting BlatantEcho (Reply 2):
thought that was the oil breather on the big GEs.

Too Forward to be the Breather.Looks more like the Cowl Antiice Exhaust.
regds
MEL



Think of the brighter side!
User currently offlineJamesbuk From United Kingdom, joined May 2005, 3968 posts, RR: 4
Reply 5, posted (8 years 10 months 2 weeks 6 days 4 hours ago) and read 2653 times:

would the anti ice be in like a tube that would circulate round the inlet and that being the exaust of that because if it was just a random outlet it wouldnt do much at 38000 feet


You cant have your cake and eat it... What the hells the point in having it then!!!
User currently offlineAirfoilsguy From , joined Dec 1969, posts, RR:
Reply 6, posted (8 years 10 months 2 weeks 5 days 22 hours ago) and read 2515 times:

My question is if you are close enough to a running engine to worry about the exhaust from that vent, shouldn't you be a bit more worried about getting sucked into the engine?

User currently offlineKaddyuk From Wallis and Futuna, joined Nov 2001, 4126 posts, RR: 25
Reply 7, posted (8 years 10 months 2 weeks 5 days 20 hours ago) and read 2486 times:

Quoting Airfoilsguy (Reply 6):
My question is if you are close enough to a running engine to worry about the exhaust from that vent, shouldn't you be a bit more worried about getting sucked into the engine?

Not always, if you have to manually open the start valve on a jet, that requires being close to the engine and if they have for any reason left anti-icing on (which they normally shouldnt) then hot air will start to pour out.

Another is when an aircraft lands... if they shut the anti-icing off on the taxi to the terminal, hot gasses may still be coming out of the nacelle even after shutdown...



Whoever said "laughter is the best medicine" never had Gonorrhea
User currently offlineFr8Mech From United States of America, joined Sep 2005, 5516 posts, RR: 14
Reply 8, posted (8 years 10 months 2 weeks 5 days 20 hours ago) and read 2484 times:

Quoting Airfoilsguy (Reply 6):
My question is if you are close enough to a running engine to worry about the exhaust from that vent, shouldn't you be a bit more worried about getting sucked into the engine?

The system can also be operated on the ground for test purposes.



When seconds count...the police are minutes away.
User currently offlineGrbld From Netherlands, joined Dec 2005, 353 posts, RR: 3
Reply 9, posted (8 years 10 months 2 weeks 5 days 9 hours ago) and read 2392 times:

Quoting Kaddyuk (Reply 7):
if they shut the anti-icing off on the taxi to the terminal, hot gasses may still be coming out of the nacelle even after shutdown

Except when you're in icing conditions when taxiing in. Most operators (all?) leave engine anti-ice on during taxi-in. Even though you're using relatively low thrust settings, there's still no reason not to avoid having ice build up on the inlet and break off, being ingested by the engine.

It is, obviously more critical when taxiing out for takeoff, so anti-ice will go on on the ground after engine start.

Grbld.


User currently offlineFLY2HMO From , joined Dec 1969, posts, RR:
Reply 10, posted (8 years 10 months 2 weeks 5 days 7 hours ago) and read 2350 times:

What engine is it anyways? I'm pretty sure it's not a GE90, isn't that a Trent?

[Edited 2005-12-17 18:06:28]

User currently offlineSfomb67 From United States of America, joined Dec 2005, 417 posts, RR: 0
Reply 11, posted (8 years 10 months 2 weeks 4 days 17 hours ago) and read 2252 times:

Quoting Jamesbuk (Reply 5):
would the anti ice be in like a tube that would circulate round the inlet and that being the exaust of that because if it was just a random outlet it wouldnt do much at 38000 feet

The anti-ice tube is a circular tube just behind the silver L/E on the nose cowl. It generally has small holes in it to allow the hot anti-ice air to spray the nose cowl L/E and the exhaust will prevent pressure build-up by dumping the excess overboard.



Not as easy as originally perceived
User currently offlineMolykote From United States of America, joined Aug 2005, 1341 posts, RR: 15
Reply 12, posted (8 years 10 months 2 weeks 4 days 13 hours ago) and read 2229 times:
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Quoting FLY2HMO (Reply 10):
What engine is it anyways? I'm pretty sure it's not a GE90, isn't that a Trent?

It's a GE90-94B. The spinner is a good way to distinguish some of the larger engines in my experience. I'd be lying however if I said I didn't double check this in my "2005 Turbine-Engined Fleets of the World's Airlines" book provided by Air BP prior to posting. This variant of the GE90 also has fairly straight blades compared to the -115B version or a Trent.



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