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Old 01-06-2019, 08:33 AM   #1
Nealius
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Default Flap settings on takeoff?

I'm confused on flap usage during takeoff. Chuck's guide says to retract flaps before takeoff. The DCS manual says to extend flaps before takeoff, but fails to explain how far to extend the flaps. Other sim forums say to extend flaps to 20 degrees if you have more than 60% fuel, but their FM may be different than the DCS FM. This is all very conflicting and confusing.

How should I set my flaps on takeoff?
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Old 01-06-2019, 09:02 AM   #2
golani79
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You can extend them 20 degrees to get her up a little sooner.

Normally I never use flaps though as runways are long enough anyways even with max weight.
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Old 01-06-2019, 09:49 AM   #3
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With less than 80% fuel, and a long runways and no bomb, I tended to use 1,2 ATA and flaps retracted. Trim at 1,5 nose heavy...
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Old 01-06-2019, 10:33 AM   #4
Nealius
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I'll have to check my ATA again, but I'm generally between 1.2 and 1.3. I was doing well last night and now I'm suddenly having problems today. I tried 10 degrees flaps with full nose down trim and encountered severe pitch up and left roll despite forward and right stick to counter. I tried 20 degrees and had less problems.
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Old 01-06-2019, 11:41 AM   #5
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I never extend the flaps for take-off in the Bf-109. She is very eager to up anyway, so no need to encourage her.
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Old 01-06-2019, 01:47 PM   #6
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Quote:
Originally Posted by LeCuvier View Post
I never extend the flaps for take-off in the Bf-109. She is very eager to up anyway, so no need to encourage her.
^^
Nose down trim and that's it.

I often even apply some stick forward once the rear wheel is off the ground to pick up more speed before letting it take off on its own.
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Old 01-06-2019, 01:49 PM   #7
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Quote:
Originally Posted by LeCuvier View Post
I never extend the flaps for take-off in the Bf-109. She is very eager to up anyway, so no need to encourage her.
well...with gear down, and flaps to 2nd position ~20° it has more a nose down tendency than with flaps retracted. furthermore, even if its not necessary at the JFK runways we have on our current maps, it will shorten the TOD, which is never a bad thing.

Last edited by birdstrike; 01-06-2019 at 01:54 PM.
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Old 01-06-2019, 03:13 PM   #8
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No flaps on takeoff unless you have a heavy bomb. They're unnecessary. Afaik, Luftwaffe did not routinely use them for takeoff.
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Old 01-06-2019, 03:54 PM   #9
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most of the ww2 109takeoff footage i saw suggest the opposite....
i know its very much possible to takeoff without flaps, nevertheless they dont hurt but help.

Last edited by birdstrike; 01-07-2019 at 11:34 AM.
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Old 01-06-2019, 04:01 PM   #10
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I find it confusing that, normally when extending flaps I get a pitch down moment, but when I take off with flaps down, 2 degrees nose down trim, and neutral stick I get massive pitch up once the wheels leave the ground.
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