High speed roll in an F-5A

[brettt777]

I have an F-5A Tiger that I love to fly. It's a beautiful aircraft and flies great except for one thing. At about 620-630 knots, I completely loose the ability to roll. Pitch still works fine but about 600 knots roll starts to fade and then disappears completely. The owner of the company I work for is a retired USAF Colonel. He has flown everything from A-10s to C-141s, including T-38s. He told me that if anything the roll rate would increase at that speed but certainly wouldn't decrease and disappear. So my question is, what setting in the air file or cfg file would keep it from doing that? It has an airwrench entry in the cfg file. Is there something in there that tells it to stop rolling at high speeds?

[Meck]

Hey, this same question has been posted not long ago... Maybe use the Search-Function?!


edit: oh, sry it's been you that asked it...  ::)

[Rich H]

You could try contacting the developer, it's probably built into the .air file.

[brettt777]

Okay I figured out what's happening but I still don't know why. It's not that the ailerons loose their effectiveness. It's that they just stop moving. As I increase speed, the amount of movement I get from the ailerons decreases until they just stop moving altogether at 630 knots or so. The horizontal stab seems to decrease its movement also but still moves enough to be effective even at high speeds. So, that being said, what would make it do that? What setting limits control surface movement as speed increases? I have the entire airwrench entry in the cfg file "removed" but I still have this problem.

[brettt777]

I have looked at several other aircraft and while they all gradualy decrease the amount of flight control movement as speed increases, none of them decrease it to the point it doesn't move at all. So, I am wondering what setting in the air file or cfg file does that...?

[Staiduk]

That's not an easy question to answer Brett; without having the specific file and time to look at it. There are a lot of variables that can affect the A/C's roll rate at speed. If I were you, I'd look not in the .cfg but the .air file where the primary flight characteristics are established. (The .cfg 'tweaks' the characteristics established in the .air file, and adds other secondary considerations like lights, viewpoints, whell and scrape points etc.)

I don't have FSX, but I'll look at a couple of my FS9 jets and see if I can find the parameters you're looking for. Be patient - it could take a few days.
'Course, if you find it first, please let us know.

Cheers!

[brettt777]

It's the F-5A Freedom Fighter available right on this website in the FSX Military downloads on page 5 if you're interested.

[wsciutti]

Brett,

I don't normally recomend payware but I have the Alphasim F5E which I throughly enjoy(has a gunsight) and just tested the roll at 640 IAS and she went around like a clock.

You might check into this one.

Jack Sciiutti

[Apex]

There's an F-5 and an F-20 here somewhere that used to be payware, I think it's Iris Simulations, now available as freeware, just run a search.