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User currently offlineVikkyvik From United States of America, joined Jul 2003, 11098 posts, RR: 25
Posted (11 years 1 week 17 hours ago) and read 4483 times:

In the following picture on an MD-11, on the flap handle, there is a portion of it labeled "Dial-A-Flap," and there is what looks to be a corresponding dial-a-flap handle next to the flap handle. Anyone know what "Dial-A-Flap" is?

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Photo © Anssi Lisko



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7 replies: All unread, jump to last
User currently offlineMD11Engineer From Germany, joined Oct 2003, 14527 posts, RR: 62
Reply 1, posted (11 years 1 week 16 hours ago) and read 4433 times:

The "Dial-a-flap" system is a simple mechanism which moves the flap lever detent between 10° and 28° by turning the wheel. Afterwards you set the flap lever into the selected position. This allows for almost unlimited flap extensions in the take-off range depending on aircraft weight and runway conditions.
Don´t try to move the flap lever by turning the wheel, because you might break the mechanism.
The index with the dial-a-flap inscription shows the position of the detent in the center pedestal. Landing setting is normally 15°.


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User currently offlineRendezvous From New Zealand, joined May 2001, 521 posts, RR: 0
Reply 2, posted (11 years 1 week 16 hours ago) and read 4413 times:

Good design there!

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User currently offlineMeister808 From United States of America, joined Jan 2000, 973 posts, RR: 1
Reply 3, posted (11 years 1 week 10 hours ago) and read 4310 times:

That is pretty cheeky.

Anyone else use that design?


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User currently offlineMD11Engineer From Germany, joined Oct 2003, 14527 posts, RR: 62
Reply 4, posted (11 years 6 days 19 hours ago) and read 4212 times:

I think it was used on DC-10s as well.


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User currently offlineRydawg82 From United States of America, joined Sep 2001, 870 posts, RR: 7
Reply 5, posted (11 years 6 days 16 hours ago) and read 4186 times:

And the MD80 uses it as well...

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User currently offlineSlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 66
Reply 6, posted (11 years 6 days 15 hours ago) and read 4171 times:

My small exposure to it: The performance tables for any given runway might have one page for Flaps 15, with allowable takeoff weights at given temperatures and another at "Optimum Flap" which would give the MGTOW at temperature and the flap setting to be used.

Similar for the database for computer generated takeoff data. Any current MD-80 pilots confirm that?

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User currently offlineCorsair2 From United States of America, joined Jan 2001, 248 posts, RR: 0
Reply 7, posted (11 years 4 days 17 hours ago) and read 3972 times:

The 717 has the Dial-A-Flap. Helps peformance at hot and high fields.

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