Stickers
Topic Author
Posts: 74
Joined: Tue Sep 04, 2007 7:10 am

Mig-29 Air Intake Question.

Wed Apr 30, 2008 9:57 pm

I hope this hasn't been posted before, I tried to search but couldn't find anything.  crossfingers 

I have a question reagrding the air intakes of the Mig 29. In many of the photos it appears as if there are solid covers blocking the air intakes for both engines. I have never seen an actual Mig 29 so i am only going on the photo's, but i am struggling to understand what they are for and how the engines work if these are in place.

It is also completely possible that i have missed something obvious, and that this might be a really dumb question.  embarrassed  If so, feel free to enlighten me.

Here are a few photos to demonstrate what i am talking about. From what i can see, the covers are definitly in place while engines are running. (Maybe only during taxi??) Other times they're not there at all.  Confused  Confused


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Photo © Piotr Skoczylas


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Photo © Anton Balakchiev - BGspotters





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Photo © Anton Balakchiev - BGspotters


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Photo © Anton Balakchiev - BGspotters

 
chksix
Posts: 336
Joined: Mon Sep 26, 2005 6:16 pm

RE: Mig-29 Air Intake Question.

Wed Apr 30, 2008 10:00 pm

They are FOD protecting flaps that re-route the intake to draw air in from the top instead.
The conveyor belt plane will fly
 
Stickers
Topic Author
Posts: 74
Joined: Tue Sep 04, 2007 7:10 am

RE: Mig-29 Air Intake Question.

Wed Apr 30, 2008 10:02 pm

Thanks for the info, but for what reason would one do such a thing, and is it something that the plane does automatically or is it a pilot action?
 
f4wso
Posts: 942
Joined: Sun Oct 19, 2003 1:58 pm

RE: Mig-29 Air Intake Question.

Wed Apr 30, 2008 10:30 pm

It is useful for landing on debris strewn runways

Gary
Cottage Grove, MN, USA
Seeking an honest week's pay for an honest day's work
 
checksixx
Posts: 1148
Joined: Wed Mar 09, 2005 11:39 pm

RE: Mig-29 Air Intake Question.

Thu May 01, 2008 1:29 am



Quoting Stickers (Reply 2):
Thanks for the info, but for what reason would one do such a thing, and is it something that the plane does automatically or is it a pilot action?

To prevent FOD. Its automatic.
 
TedTAce
Posts: 9098
Joined: Sun Mar 27, 2005 12:31 am

RE: Mig-29 Air Intake Question.

Thu May 01, 2008 4:08 am



Quoting Stickers (Reply 2):
what reason would one do such a thing

If you check Russian aircraft history you'll see they tend to engineer for less optimum conditions then most US Aircraft require. While it's very rare you'll see a modern Russian fighter flying off an unpaved surface, they build them to do so none-the-less. The 29 is not the only A/C to do this.
This space intentionally left blank
 
Acheron
Posts: 1835
Joined: Mon Sep 05, 2005 1:14 am

RE: Mig-29 Air Intake Question.

Thu May 01, 2008 6:46 am

Quoting TedTAce (Reply 5):
The 29 is not the only A/C to do this.

Yep. The Su-27 also have the same feature, except when closed, they only filter the air and send everything else to the bottom.
You can spot it in this video.


They have been removed in the Su-35, though.

[Edited 2008-04-30 23:49:48]
 
IronDuke08
Posts: 12
Joined: Mon Feb 11, 2008 1:18 pm

RE: Mig-29 Air Intake Question.

Thu May 01, 2008 8:07 am



Quoting Acheron (Reply 6):
They have been removed in the Su-35, though.

I think I read that the newer MiG-29s no longer have the feature either, in order to save weight and increase fuel capacity.
 
Stickers
Topic Author
Posts: 74
Joined: Tue Sep 04, 2007 7:10 am

RE: Mig-29 Air Intake Question.

Thu May 01, 2008 10:52 am

Thank you all for the information and video.
Just out of curiosity, should the protection flap malfunction and close during flight (I know its probably impossible, but hypothetically) would the engines be able to draw in enough air to keep flying?

Stickers
 
Acheron
Posts: 1835
Joined: Mon Sep 05, 2005 1:14 am

RE: Mig-29 Air Intake Question.

Thu May 01, 2008 6:11 pm

It probably will keep working as normal considering how hard it seems to be to stall the engines on the MiG-29 and Su-27. The only effect would probably be an increase in drag and a severe reduction in speed.
 
sovietjet
Posts: 2549
Joined: Sat Mar 15, 2003 12:32 am

RE: Mig-29 Air Intake Question.

Fri May 02, 2008 6:51 am

The engine breathes through the "grills" located on top of the plane where the wing root starts.

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