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F-16 upgraded to 'production' status

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Re: F-16 upgraded to 'production' status

Postby erik » Wed Sep 12, 2012 8:50 pm

I suggested blackbird to set up a git repository to make development easier for a group of developers. But it hasn't been updated since which makes it kind of useless. If development takes a flight there then it will be the main development repository and the end result will be pushed to the official repository (flightgear git).

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Re: F-16 upgraded to 'production' status

Postby asic_designer » Thu Nov 22, 2012 5:46 pm

Sorry for coming late to the party guys, but am I reading this right, is there a new version of the F16 for download? If so where, I love that plane.
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Re: F-16 upgraded to 'production' status

Postby erik » Thu Nov 22, 2012 8:28 pm

Unfortunately there isn't. I gave up on that attempt since nothing came out of it despite a flying start.

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Re: F-16 upgraded to 'production' status

Postby Necolatis » Sun Apr 17, 2016 1:08 am

Noticed some problems with the JSBSIM F-16:

Max Roll-rate

I think its limited now to around 181 degs/sec. From the open sources I could gather 240 Deg/s seems to be more in line with its capabilities, especially also considering the F-18 can do 225 degs/s.

Pitch oscillations

When flying around mach 1.2 at 5000 ft it starts heavy pitch oscillations.

Trouble reaching 9G at corner speed

It seems to more be around 5-7 G at around 400 KT around 6000-7000 ft.
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Re: F-16 upgraded to 'production' status

Postby erik » Sun Apr 17, 2016 8:10 am

Necolatis wrote in Sun Apr 17, 2016 1:08 am:Noticed some problems with the JSBSIM F-16:

Max Roll-rate

I think its limited now to around 181 degs/sec. From the open sources I could gather 240 Deg/s seems to be more in line with its capabilities, especially also considering the F-18 can do 225 degs/s.

This might have something to do with some control law I'm not aware of. I've noticed that pulling up before rolling increases the roll rate considerably.

Pitch oscillations

When flying around mach 1.2 at 5000 ft it starts heavy pitch oscillations.

I don't think I've seen that one before.
Trouble reaching 9G at corner speed

It seems to more be around 5-7 G at around 400 KT around 6000-7000 ft.

Note that the F-16 is not able to pull 9G always at any time, or continuous. It heavily depends on it's velocity.

It might be a good idea to recalibrate the pid controllers though. They are from quite some versions of JSBSim ago.

Erik

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Re: F-16 upgraded to 'production' status

Postby Necolatis » Sun Apr 17, 2016 9:13 am

erik wrote in Sun Apr 17, 2016 8:10 am:This might have something to do with some control law I'm not aware of.


I might have misread how "fcs/roll-rate-norm" influence the roll-rate you are able to perform then. Forget I mentioned that.

Thanks for the answers.
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Re: F-16 upgraded to 'production' status

Postby erik » Sun Apr 17, 2016 9:53 am

Just to be sure we're on the same page:

I meant the control law in the real F-16 which I might not know about.
The developers did some pretty neat tricks to get the optimum out of the hardware.

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Re: F-16 upgraded to 'production' status

Postby LSSH_u10500028 » Sun Aug 05, 2018 12:28 pm

Could anyone fix autopilot and upload it into repository?

Below is my way to fix autopilot:

In f16/Systems/jsb-controls.xml
line 898, change
Code: Select all
<input>fcs/fly-by-wire/pitch/trim-scaled</input>

into
Code: Select all
<input>-fcs/fly-by-wire/pitch/trim-scaled</input>
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Re: F-16 upgraded to 'production' status

Postby it0uchpods » Sun Aug 05, 2018 5:25 pm

Hi
Please checkout the new F-16 at http://www.github.com/NikolaiVChr/f16.git It is based off this one, with many improvements and fixes.

In addition, I made a new autopilot for it, so it should work fine.

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Re: F-16 upgraded to 'production' status

Postby erik » Mon Aug 06, 2018 5:46 am

Hi Josh,

Is it ready for inclusion in FGAddon?

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Re: F-16 upgraded to 'production' status

Postby Richard » Mon Aug 06, 2018 2:25 pm

I think it's still WIP - I've got a fairly large pull request that Leto needs to check; and there are still other things in progress.
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Re: F-16 upgraded to 'production' status

Postby erik » Tue Aug 07, 2018 11:30 am

Ah ok, then I'll need some patience.

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Re: F-16 upgraded to 'production' status

Postby it0uchpods » Tue Aug 07, 2018 4:26 pm

It will be worth the wait :)

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Re: F-16 upgraded to 'production' status

Postby Necolatis » Sat Sep 22, 2018 2:56 am

A little progress update since last months:

Richard has replaced the radar with a more performance optimized one. Is a big change and needs more testing before FGAddon.
JMav16 has been busy adding liveries and payloads.
it0uchpods has refined the autopilot further.
G-EED has been modifying the sounds, not all has been merged in yet though.
The document that the aerodynamics is mainly based on had an error in how leading edge flaps position were used. This resulted is subpar performance at high AoA and in negative AoA at high speed level flight. This has now been corrected.
MFD now has a HSD page and the old HSD is removed.
HUD now has steerpoint marker and different symbology.
it0uchpods made a new electrical system
Various cockpit improvements by all of us. And now has working floodlight.
Now has checklist for cold startup.
Various bugs has been fixed.

We are currently working on branch 'newRadar' if you want to test out the latest stuff.
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Re: F-16 upgraded to 'production' status

Postby Necolatis » Wed Oct 03, 2018 3:40 am

The F-16 in FGAddon has been changed, the upgrade option should appear in the 2018.2/3 launcher shortly.
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