vikkyvik
Posts: 12039
Joined: Thu Jul 31, 2003 1:58 pm

Dial-A-Flap?

Sun Jun 27, 2004 6:26 am

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



Thanks.

~Vik
I'm watching Jeopardy. The category is worst Madonna songs. "This one from 1987 is terrible".
 
MD11Engineer
Posts: 13916
Joined: Sun Oct 26, 2003 5:25 am

RE: Dial-A-Flap?

Sun Jun 27, 2004 6:52 am

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°.

Jan
Je Suis Charlie et je suis Ahmet aussi
 
rendezvous
Posts: 531
Joined: Sun May 20, 2001 9:14 pm

RE: Dial-A-Flap?

Sun Jun 27, 2004 7:06 am

Good design there!

In this forum you can learn things you never knew you never knew!
 
meister808
Posts: 924
Joined: Sat Jan 01, 2000 11:45 am

RE: Dial-A-Flap?

Sun Jun 27, 2004 1:44 pm

That is pretty cheeky.

Anyone else use that design?

-Meister
Twin Cessna 812 Victor, Minneapolis Center, we observe your operation in the immediate vicinity of extreme precipitation
 
MD11Engineer
Posts: 13916
Joined: Sun Oct 26, 2003 5:25 am

RE: Dial-A-Flap?

Mon Jun 28, 2004 4:27 am

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

Jan
Je Suis Charlie et je suis Ahmet aussi
 
RyDawg82
Posts: 835
Joined: Fri Sep 14, 2001 8:30 am

RE: Dial-A-Flap?

Mon Jun 28, 2004 7:02 am

And the MD80 uses it as well...
-R
 
SlamClick
Posts: 9576
Joined: Sun Nov 23, 2003 7:09 am

RE: Dial-A-Flap?

Mon Jun 28, 2004 7:49 am

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?




Happiness is not seeing another trite Ste. Maarten photo all week long.
 
Corsair2
Posts: 243
Joined: Thu Jan 25, 2001 11:02 pm

RE: Dial-A-Flap?

Wed Jun 30, 2004 5:51 am

The 717 has the Dial-A-Flap. Helps peformance at hot and high fields.
"We have clearance Clarence. Roger, Roger. What's our vector Victor?"

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