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Sr-71 file problems. REQ: help.. (Read 219 times)

Sep 5^th, 2004 at 12:12am

Inkil Offline
Colonel
I want to go fast, or
fly experimental..
Iowa

Posts: 11

Greetings fellow sim-pilots.

I am running into a problem with the SR-71 aircraft that I downloaded from http://www.simviation.com/fs2004military13.htm here. For some reason, not all of the aircraft is visible, the landing gear from tower or chase view doesnt show, and the aircraft shows the OVERSPEED indicator at 475kts and becomes overstressed at 525kts, also for some reason, above mach 1.1 the roll characteristics actually reverse. I have spent the greater part of the day searching for an update, but results have been less than desireable. If you know where I can obtain the config files for an operational SR-71 I would appreciate the help. Please bear in mind that I have absolutely 0 experience with altering .cgf's so I have not attempted going that route. Thank you for any assistance you might lend.

Inkil.

Dont know what to tell ya... cept, I wish someone would take the time to build the F-15 ACTIVE... *hinthint* **Begs**

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Reply #1 - Sep 5^th, 2004 at 7:22am

Politically Incorrect Offline
Colonel
Personal opinion given
free of charge!
Williamsport, PA

Gender:
Posts: 3915

I don't have the SR71 but had similar problems with another aircraft.
It would stall right after taking off, I was definately at speed but everytime it would just die.
What it was, it was installed with flaps down. Meaning everytime I would take off I would be at full flaps. I didn't find this out until after many attempts to fly the bird and was getting ready to delete it. a close up look at the back of the plane sitting on the ramps showed me why. Some planes don't fly well with flaps down on take off

and there was no way to retract them either, so I don't know if I screwed up something on install or if it was a bad file?
So you might want to look there???
It would explain the overstressing too.
But then again this might not be your problem just something to check

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Reply #2 - Sep 7^th, 2004 at 3:50pm

randombeaner Offline
Colonel
MMM...Beans... MMM...Doughnuts
...MMM Hilary Duff.
Sothern California, USA

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Posts: 406

to fix the landing gear problem on this or any other aircraft that might be missing them, go to your

"C:\Documents and Settings\xxYournamexx\Application Data\Microsoft\FS9" folder in Windows XP and find the file

FS9.cfg make a backup of it first then open it and look for the section

"[FrameCallNoWarn]"

scroll down to the SR-71 or whatever other AC is missing landing gear and change the

"Lockheed SR-71A=0"
into
"Lockheed SR-71A=1"

about the overspeed, to acheive a higher speed, you have to climb to a higher altitude where the air is less dense and sound is much slower, but near the ground it is impossible to go that fast.

and everything else works fine with my SR-71 so im not shure about the roll characteristics

Believe half of what you see, 1/4 of what you hear, and nothing that I say&&&&

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Reply #3 - Sep 7^th, 2004 at 5:42pm

Inkil Offline
Colonel
I want to go fast, or
fly experimental..
Iowa

Posts: 11

okay.. thanks for the tip on the fs9.cfg adjustments...
since I am not that familiar with anything that is in there, is there a way to tighten up the controls at high speed within the fs9 file, or the individual aircraft files?

with the sr-71, I noticed that the faster you go, the more twitchy the joystick becomes. on more than once occasion at fl700, and cruising at 2.0 Mach, a light sneeze or pull on the joystick will cause the simulator to overstress the craft and end the flight. Any ideas there?

Thanks

Dont know what to tell ya... cept, I wish someone would take the time to build the F-15 ACTIVE... *hinthint* **Begs**

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Reply #4 - Sep 7^th, 2004 at 6:17pm

randombeaner Offline
Colonel
MMM...Beans... MMM...Doughnuts
...MMM Hilary Duff.
Sothern California, USA

Gender:
Posts: 406

Quote:

with the sr-71, I noticed that the faster you go, the more twitchy the joystick becomes. on more than once occasion at fl700, and cruising at 2.0 Mach, a light sneeze or pull on the joystick will cause the simulator to overstress the craft and end the flight. Any ideas there?

that ussually happens when you fly at high speed because it is beyond the Manuevering speed "Va"

what the manuevering speed does is help you avoid too many G's because at that speed any abrupt motion on the elevator will exeed the maximum angle of attack and the aircraft will stall

beyond that speed it is very easy to rack up some strong G's because your cruising angle of attack is a lot smaller and and it is extemely easy to double your angle of attack. Every time you double your angle of attack, you get I more G force.

For example an aircraft cruising at 110 knots with a 4.5* angle of attack can only double 4 times until it reaches its critical angle of attack (18* in this example)

This only increases its G-force by 4.

a faster flying aircraft at 114 knots with only a 3* angle of attack can double its angle 6 times before reaching the critical angle of attack (18*).

In this example it would reach 6 G's before finnally stalling.

The faster you go the easier it is to rack up G forces

So when you exeed the Manuevering speed, you have to be very careful when increasing Angle of attack, thats why I let the autopilot do it.

but dont take my word for it, Ive never flown an aircraft Grin

Believe half of what you see, 1/4 of what you hear, and nothing that I say&&&&

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Reply #5 - Sep 7^th, 2004 at 11:40pm

Inkil Offline
Colonel
I want to go fast, or
fly experimental..
Iowa

Posts: 11

Speaking of autopilot, any suggestions on how to make the ap that the sr-71 uses actually work. maybe it is something simple, like I am a total newb, but the ap really doesnt seem to work as intented. the only thing I can get the panel to do is hold altitude... it wont hold course or speed.

Also one of the twitchy's I noticed, is I am really unable to maintain straight level flight. I know that this is a result of altitude and speed, but flight geometry suggests that the sr-71 is pretty stable even at mach 2+, but then I might be talking out my butt. and after all this is only a simulator....

Dont know what to tell ya... cept, I wish someone would take the time to build the F-15 ACTIVE... *hinthint* **Begs**

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Reply #6 - Sep 8^th, 2004 at 7:45pm

randombeaner Offline
Colonel
MMM...Beans... MMM...Doughnuts
...MMM Hilary Duff.
Sothern California, USA

Gender:
Posts: 406

hm I got it to hold heading for a while but for speed make shure the autothrottle switch is fliped. about the other stuff ??? ??? ???

Believe half of what you see, 1/4 of what you hear, and nothing that I say&&&&

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