[Solution] Flaps Vref blow outs.

[whiskey-zulu]

This has been a much discussed topic here on the forums, with requests for a patch to fix the odities that lie with some of
the blow-out speeds recognised by FSP and FSPX. However, there is a much easier, and in many cases, more realistic fix to
this problem - editing the aircraft.cfg.

You will find the aircraft.cfg in each aircraft's folder in both FS9 and FSX - without them, your planes won't fly!
Open the file with notepad, and make sure you uncheck "always open this file type with this program". Once you have opened
the file, you will (if you have never opened a file of this sort before) be met with alot of information, much of it looking
scarey and confusing - don't worry, it all means something!

Now you have the file open, scroll down until you find a section titled flaps.0; here you will be able to see both a
damaging speed and a blow-out speed - alter these values appropriately. Repeat for flaps.1 and
flaps.2.

Now save the file as a .txt document and test using FSP.

Note: Always make an unedited copy of the aircraft.cfg file and save it somewhere safe so that you are able to
restore the file should your modifications cause the file to stop working correctly.

Addendum:
The procedure above works for turbojets and rotorwing aircraft, but does not always work for props. The solution for props
is to edit the values as described above, but to also edit the contact points in the contact points section of the
aircraft.cfg.

[Recon]

Good thinking Whiskey.
I made this now a sticky in the Support section.

[gbapache]

I use this same method to change my A/C overspeed numbers and to give my helicoptors "parking brakes"

[whiskey-zulu]

Gbapache is correct in saying that the method I outline above may be used to edit any values in the aircraft.cfg file. However use with
care.

[timtomairways]

alwyas back up

i dont back up mine when i edit them unless i change something big, like flp speeds
but then i also know what im doing with CFG's, for the most part

[B.Scott]

Ok I have searched about and found the file.

Microsoft flightsim\SimObjects\Airplanes\b747_400

As stated above open this in wordpad. Scrolling about 3/4 of the way down the page you will find THIS!

[flaps.0]
type = 1 // 1 - tail, 2 - lead
span-outboard = 0.8 // 0.0 .. 1.0
extending-time = 25 // seconds
flaps-position.0 = 0 // degrees
flaps-position.1 = 1 // degrees
flaps-position.2 = 5 // degrees
flaps-position.3 = 10 // degrees
flaps-position.4 = 20 // degrees
flaps-position.5 = 25 // degrees
flaps-position.6 = 30 // degrees
damaging-speed = 220 // KIAS
blowout-speed = 250 // KIAS
lift_scalar = 0.7
drag_scalar = 0.9
pitch_scalar= 0.9
system_type = 1 //Hydraulic

[flaps.1]
type = 2 // 1 - tail, 2 - lead
span-outboard = 0.8 // 0.0 .. 1.0
extending-time = 2 // seconds
flaps-position.0 = 0 // degrees
flaps-position.1 = 1.0 // degrees
damaging-speed = 250 // KIAS
blowout-speed = 300 // KIAS
lift_scalar = 0.3
drag_scalar = 0.1
pitch_scalar= 0.1
system_type = 1 //Hydraulic

Change the values in red to 250 and 300 and SAVE the changes. Then you are done and you can fly without ripping off the flaps
and getting penalty points for flying too fast with flaps extended.

B.Scott

moderator edit:
Dear B.Scott,
As this is a general fix for allflap blow-outs, it is better to generalise as all aircraft.cfgs differ in the position
of the parts that require editing, but every aircraft has one; your post has been edited accordingly.

Regards
Whiskey-zulu
Forum moderator

[B.Scott]

Dear WZ,
Personally I have never had a problem with flap blow outs in aircraft other than the 747-400. So my personal issue was with the 747. That
said I have not flown them all in FXpaX. Certainly the fix will work just as well in any other aircraft found in te config file. It may well be that
the problem occures in other aircraft as well. In any case I now have no trouble in the 747 thus one less glitch.

Thx
B.Scott

[whiskey-zulu]

B.Scott,

Roughly ninety percent of the aircraft I know of will be affted by wrong blow out speeds, hence the generalisation here.

[Doc3511]

i modified the aircraft.cfg (damage speed and blow speed) and FSPX recognizes the original speed.

[whiskey-zulu]

Have you actually flown a test run in the aircraft after modding the .cfg folder rather than just looking at the "posted data" in FSX?

[Doc3511]

Yes whiskey i tried a couple of times after changing the cfg, restarted the game and nothing happened.
i reinstalled the aircraft folder and changed the flaps.0 and flaps.1 (no flaps.2 in default 747) i put same speeds in both flaps.0 and flaps1 :280 for damage and 300 for blow out , it changed , FSPAX now says Vfe 240 knots!!!.
i tried to write higher numbers in damage and blow out but no changes in vfe.
why, and why does it say 240 when i wrote 280?
i put the same numbers in both flaps.0 and flaps.1 wich is not realistic since inboard can take more speed that outboard but that was the only way to make it work i dont mind that anyway, what i do mind is the damage speed i want the Vfe 280 knots.
how do i do that whiskey?
another question FSX does not take flap position in consideration right?
i mean do flap 1 and flap 30 have the same damage speed and blow out speed in the game?



Post Edited ( 07-06-10 17:44 )

[whiskey-zulu]

Well then you've got what you wanted from what I can gather - flaps won't blow out until 250 KIAS but you will be penalised for exceeding 240 KIAS for
too long with them extended.

[Doc3511]

Yes i think I succeded when i reinstalled the aircraft folder and sorry for posting the other topic.
Thanks a lot again for your help.



Post Edited ( 07-06-10 17:49 )

[IanHarr]

Sorry if I wasted someones time.
I found the post on altering the aircraft.cfg file, so will try that first.

[hyderpotter]

Is blowout-speed = 300 // KIAS the right setting or do I need to change it?