Simviation Forum - Reversing Flap Drag

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Reversing Flap Drag (Read 109 times)

Sep 21^st, 2003 at 2:22pm

HABU Offline
Colonel
Paradise by dashboard
light.

Posts: 372

Hi all,

Does anyone know how to adjust and reverse flap drag.

My flaps have 5 positions but whereas normal flaps increase in drag from position 1 to 5 I want the drag to decrease from 1 to 5. So flaps in full down position create no drag at all.

Any help much appreciated.

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Reply #1 - Sep 21^st, 2003 at 2:54pm

nwt Offline
Colonel
I love YaBB 1G - SP1!

Posts: 42

I dont know much about it but I will try and help

first look for this in the aircraft.cfg

========================================

[flaps.0] //Trailing Edge Flaps
type=1 // 1 - tail, 2 - lead
span-outboard=0.8    // 0.0 .. 1.0
extending-time=20       // seconds
flaps-position.0=0 // degrees
flaps-position.1=1 // degrees
flaps-position.2=2 // degrees
flaps-position.3=5 // degrees
flaps-position.4=10       // degrees
flaps-position.5=15       // degrees
flaps-position.6=25       // degrees
flaps-position.7=30       // degrees
flaps-position.8=40       // degrees
damaging-speed=250    // KIAS
blowout-speed=300    // KIAS
lift_scalar=1.0
drag_scalar=1.0
pitch_scalar=1.0
system_type=1       //Hydraulic

[flaps.1] //Inboard Leading Edge Flaps
type=2 // 1 - tail, 2 - lead
span-outboard=0.8    // 0.0 .. 1.0
extending-time=2 // seconds
flaps-position.0=0 //
flaps-position.1=1.0    //
damaging-speed=250    // KIAS
blowout-speed=300    // KIAS
lift_scalar=1.0
drag_scalar=1.0
pitch_scalar=1.0
system_type=1       //Hydraulic

[flaps.2] //Outboard Leading Edge Slat
type=2 // 1 - tail, 2 - lead
span-outboard=0.8    // 0.0 .. 1.0
extending-time=3 // seconds
flaps-position.0=0 //
flaps-position.1=0.5    //
flaps-position.4=1.0    //
damaging-speed=250    // KIAS
blowout-speed=300    // KIAS
lift_scalar=1.0
drag_scalar=1.0
pitch_scalar=1.0
system_type=1       //Hydraulic

========================================

You might want to select the offending one which in your case would be flap.5 (or whatever it is in the .cfg) and put it on drag_scalar=0.0 (and then continue from there.) Whatever you do though dont go to the .air file I dont think that will help out much I think the solution might be in the aircraft.cfg

But remember I am not a professional with these .cfg's so back it up lol

Good Luck

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Reply #2 - Sep 23^rd, 2003 at 12:08am

RIC_BARKER Offline
Colonel
"Shazzam"

Gender:
Posts: 842

Yup, that's correct.

I think I know what this is for so set the lift scalar to 0, and change the drag scalar accordingly, with the flaps max position having a scalar of 0.

Remember to set the blowout speed high enough.

You'll have to experiment with the pitch scalars a little. Positive pitch scalars impart a nose-down attitude if the flap position is behind the model datum, and if the flaps are forward of the datum, the nose pitches up.

Hope that helps Dave,

Ric B.

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