I think is sad to see that the raw power and acceleration that really made the viggen special is now gone :(

[isglas]

The extreme acceleration that the viggen did have before the update was something that made it really unique. It is very sad to see it gone

[Rudel_chw]

1 hour ago, isglas said:

The extreme acceleration that the viggen did have before the update was something that made it really unique.

 

Not worth it if it was not faithful to the real aircraft.

[isglas]

16 minutes ago, Rudel_chw said:

 

Not worth it if it was not faithful to the real aircraft.

Do we have any documentation on this though?

[Rudel_chw]

1 hour ago, isglas said:

Do we have any documentation on this though?

 

I don't ... but I do trust Heatblur to have researched this performance point and I also trust Heatblur's Subject Matter Experts.

Do you have any documentation that shows this update to be wrong?

[MYSE1234]

1 hour ago, isglas said:

Do we have any documentation on this though?

We do, and it's still over performing a lot at high altitudes with full burner.
The performance charts can be found in "SFI AJ37 Del 3". It should be available in a thread here on the forum if searched for if you want to dive deeper.

If something is changed, and mentioned in the changelog, it's most likely for more accuracy. Even if that means performance gets worse in some way. 

Edited December 16, 2022 by MYSE1234

[Sideburns]

You paid for a simulator, not an arcade game. Besides, it is still fast.

Edited December 16, 2022 by Sideburns
Edited to remove mention of an "arcade game" with a name like conflict storm.

[Lucas_From_Hell]

1 hour ago, isglas said:

Do we have any documentation on this though?

Yes. Here's a comparison made by another member of manual data versus the old performance in DCS, with his caption. All credit to @rossmum for the work, I'm just quoting. To keep it short, Heatblur did a great job making your product a better simulation of reality, so pop open a beer and let's drink to that!

Quote

At sea level, mil thrust is maybe a touch slow to accelerate to M 0.9 but is still relatively close, and zone 3 is tuned almost on the dot. Zone 1 and 2 show discrepancies, particularly zone 1, although they aren't very large at this altitude.

Quote

At 6km alt, mil thrust gradually diverges from the chart, ending up a little slower than expected. Zone 1 and 2 show large discrepancies. Zone 1 follows zone 2's curve, zone 2 follows zone 3's curve, and zone 3 is doing something else entirely.

Quote

At 11km alt, only zone 3 was tested. The results were very far off the expectation: according to the chart, level acceleration from M 0.9 to M 1.6 should take about 5 minutes and 45 seconds. In the sim, this was achieved in just one minute (!), while acceleration from M 0.9 to M ~1.63 (as far as the line is drawn) should take about 7 minutes and 15 seconds, while in DCS it took 1 minute and 15 seconds. This is a very large discrepancy even compared to the aircraft's own charts, but also compared to acceleration profiles of other aircraft known to have phenomenal performance in this area (F-104, MiG-23, MiG-29). Something is clearly causing an issue here but I don't know what.

Quote

THRUST/DRAG EQUILIBRIUM SPEEDS AT SEA LEVEL

This has been something I've been meaning to report for a while, but invariably by the time I got trackfiles, DCS would update and break them. As a result I'll just post the results of my testing now and drum up the trackfiles when I get time. Please note that this is separate to, but was compounded by, the now-fixed drag issues with Sidewinder launch rails.

Each test was run using the circled loadout group from the AJ 37 loadout tables - so rent FPL was clean, group 1 was KA-24-XT-24-KB, group 2 was KA-24-XT-blank-04, group 3 was RA-RA-XT-RA-RA, group 4 was SB-SB-XT-SB-SB.

[Mr_sukebe]

Great to see that HB are still continuing to refine as they gain new data.

[IronMike]

On 12/17/2022 at 3:20 PM, Бойовий Сокіл said:

This wasn't exactly new data though, it was public when the Viggen came out.

Correct. This wasn't done following new data, instead it was needed to overhaul the limitations of a much older code.

[Raviar]

On 12/17/2022 at 12:06 AM, Lucas_From_Hell said:

Yes. Here's a comparison made by another member of manual data versus the old performance in DCS, with his caption. All credit to @rossmum for the work, I'm just quoting. To keep it short, Heatblur did a great job making your product a better simulation of reality, so pop open a beer and let's drink to that!

In HB we Trust.

The phantom is in the right hands 

[TOViper]

7 hours ago, Raviar said:

In HB we Trust.

The phantom is in the right hands 

True.

A slight speed up would be good, though ...