Simviation Forums

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.  

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

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.