LASoctoberB6
Posts: 1936
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Engines And Flaps

Mon Apr 02, 2007 4:41 pm

has anyone ever noticed that when the flaps are deployed, they are never connected with the two inboard edges? why

http://www.airliners.net/open.file/1193973/L/ <-- sorta visible there

http://www.airliners.net/open.file/0809359/L/

http://www.airliners.net/open.file/1182402/L/

[Edited 2007-04-02 09:45:22]
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HAWK21M
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RE: Engines And Flaps

Mon Apr 02, 2007 7:56 pm

The MidFlap would.
regds
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Starlionblue
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RE: Engines And Flaps

Mon Apr 02, 2007 9:45 pm

First of all:

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Secondly, I am not sure I understand the question. You mean why are the inboard flaps not connected to the fuselage? If that is your question, HAWK21M is correct that some of them are. But I don't know the particulars of flap design well enough to tell you why or why not.
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Molykote
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RE: Engines And Flaps

Mon Apr 02, 2007 10:27 pm

I'm not sure about the exact nature of your question either....

However, if you are asking why the flaps have a "gap" in continuity at the spanwise engine location consider the effect of the violent exhaust stream on the flap structure and potential alterations to aircraft handling.
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Jetlagged
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RE: Engines And Flaps

Tue Apr 03, 2007 1:52 am

From the thread title I assume the question is about the split between the inboard and outboard flaps. In all three examples shown, the inboard and outboard flaps have inboard ailerons between them (OK on the 777 they are called flaperons  irked  ). The split at the engine is convenient but not essential. Other aircraft have continuous flaps across the engine exhaust, often for beneficial reasons.

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The MD80 has inboard and outboard flaps which are connected by a fairing.

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LASoctoberB6
Posts: 1936
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RE: Engines And Flaps

Tue Apr 03, 2007 2:23 am

Quoting Jetlagged (Reply 4):
The MD80 has inboard and outboard flaps which are connected by a fairing.

i tryin to get to that sort of thing, like on this 757, between the 1st and 2nd flap canoe, the flap doesnt reach out as far ...
http://flightlevel350.com/Aircraft_B..._Airlines_Aviation_Video-8283.html
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oly720man
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RE: Engines And Flaps

Tue Apr 03, 2007 6:29 am

Quoting LASOctoberB6 (Reply 5):
between the 1st and 2nd flap canoe, the flap doesnt reach out as far

Gap for the jet exhaust. The inboard section is 2 element and the smaller element probably couldn't be extended outboard because of the structural loading due to the jet.


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The A380 on the other hand has no exhaust gap in the flap, but it just has a single element flap.


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speedracer1407
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RE: Engines And Flaps

Tue Apr 03, 2007 6:35 am

Quoting LASOctoberB6 (Thread starter):
has anyone ever noticed that when the flaps are deployed, they are never connected with the two inboard edges?

Hardly "never," and in addition to exceptions posted above:


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And another nice shot of the A380:

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Photo © Bernard Charles (Art-Avia)

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LASoctoberB6
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RE: Engines And Flaps

Tue Apr 03, 2007 10:43 am

thanks for clearing that up people....
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