DC-10 Flap 25 Take-Off?
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DC-10 Flap 25 Take-Off?
Hi,
Does any military pilot who has flown the KC-10/DC-10, ever used flap 25 for take-off? If so what performance advantages if any are there?
Thanks
Does any military pilot who has flown the KC-10/DC-10, ever used flap 25 for take-off? If so what performance advantages if any are there?
Thanks
Join Date: Sep 1999
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We operate the MD11 with Flaps 25 as a fixed flap setting and the "fabulous" dial a flap! As for the benefits, well its certainly better on shorter runways and allows slower takeoff speeds. But as you know that logic applies to all aircraft
Mutt.
Mutt.
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I flew the DC-10-30 for many years until just recently, and for a number of operators. The highest flap setting normally used for t/o is 20 degrees, which must be selected on the dial-a-flap wheel.
The fixed flap gates are 15, 22, 35 & 50
I never heared of any performance available for, or anyone trying to use, flap 25 for t/o in a DC10. However, thats not to say that it can't be done!
ex-DCD
The fixed flap gates are 15, 22, 35 & 50
I never heared of any performance available for, or anyone trying to use, flap 25 for t/o in a DC10. However, thats not to say that it can't be done!
ex-DCD
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Dial-a-flap
This is the colloquial term for MDD's excellent takeoff flap selector wheel, which allows on the DC10 / MD11 any flap setting between 1 and 25 degrees to be preselected for t/o.
This allows you to go into the t/o performance tables and choose the flap setting for the highest RTOW, thus "optimising" your t/o performance for a given runway / temperature, and so lift the highest payload off said runway. Hence this proceedure is known as an "optimum flap takeoff", as opposed to using a fixed-gate flap setting.
This system is also fitted to the MD80 series.
Boeings and....ughhh...Airbus simply have fixed flap settings for takeoff.
This allows you to go into the t/o performance tables and choose the flap setting for the highest RTOW, thus "optimising" your t/o performance for a given runway / temperature, and so lift the highest payload off said runway. Hence this proceedure is known as an "optimum flap takeoff", as opposed to using a fixed-gate flap setting.
This system is also fitted to the MD80 series.
Boeings and....ughhh...Airbus simply have fixed flap settings for takeoff.
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...just a small correction
MD-11 dial-a-flap range is between 10 and 25 degrees, and any position can be used during takeoff and approach. 0/Ext, 28, 35 and 50 are fixed flaps/slats settings.
Rgds
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Bugg smasher,
Because of the “dial a flap” setting, any performance penalties need to be applied to a fixed flap setting, for example applying corrections for a thrust reverser inoperative on wet/contaminated runways. Can I ask what Flap setting you use for this?
Also what Flap setting would you recommend for a close-in noise monitor with no obstacles surrounding the airport, or for a 7500 ft runway ?
Thanks.
Mutt.
Because of the “dial a flap” setting, any performance penalties need to be applied to a fixed flap setting, for example applying corrections for a thrust reverser inoperative on wet/contaminated runways. Can I ask what Flap setting you use for this?
Also what Flap setting would you recommend for a close-in noise monitor with no obstacles surrounding the airport, or for a 7500 ft runway ?
Thanks.
Mutt.