DummyCatz Posted May 22, 2023 Posted May 22, 2023 (edited) The dynamic pitch stability is degraded over around 400 kts, indicating a recurring bug that was fixed some time ago. The g-response is no longer a first-order response. New track is attached. Viper phugoid at speeds.trk Edited May 23, 2023 by DummyCatz 2
ED Team BIGNEWY Posted May 22, 2023 ED Team Posted May 22, 2023 Sorry you will need to include a new track if you think there is still a bug, the older tracks will not always be good. Forum rules - DCS Crashing? Try this first - Cleanup and Repair - Discord BIGNEWY#8703 - Youtube - Patch Status Windows 11, NVIDIA MSI RTX 3090, Intel® i9-10900K 3.70GHz, 5.30GHz Turbo, Corsair Hydro Series H150i Pro, 64GB DDR @3200, ASUS ROG Strix Z490-F Gaming, PIMAX Crystal
DummyCatz Posted May 23, 2023 Author Posted May 23, 2023 Track is attached to OP, and it includes 4 tests at different speed/alt. The third test, starting at 540 kts, shows a correct 1st order g-response. The rest of them are all incorrect behavior with a noticeable phugoid. 2
DummyCatz Posted November 14, 2023 Author Posted November 14, 2023 The phugoid is gone in 2.9. Many thanks. Now the opposite happen and there's a tendency to overshoot the pitch attitude upon releasing the stick, but the original bug is fixed. 1
DummyCatz Posted August 20, 2024 Author Posted August 20, 2024 (edited) This is a follow up report. As said in the post, this bug fix introduces a new bug, and it's not investigated yet. There's a tendency for the aircraft to overshoot the pitch attitude upon releasing the stick. That is, after a snap pull on the stick (impulse input), and as soon as the stick returns to neutral position, the pitch motion would briefly stop for a moment, and then aircraft will keep pitching up for a few degrees before the pitch motion completely stops. Please note that there's no such tendency when pitching down. The same happens with rolling the aircraft (also shown in the track), that as soon as the roll stops, the aircraft tends to pitch up for a few degrees. This is abnormal as the FLCS is not able to dampen the pitch motion very well and suppress such uncommanded pitch-up. Thanks for your attention to the handling of the aircraft. F16 Pitch creep after pulling or just by rolling.trk Edited August 20, 2024 by DummyCatz 2 2
darkman222 Posted October 3, 2024 Posted October 3, 2024 DCS 2.9.8.1107 Improved. FLCS Pitch overshoot/creep when releasing stick. Was it really adressed? If you remember @DummyCatz test the pitch creep is about 5 degrees when the stick is released. If I try it with the recent version it almost looks the same. Although I dont know how much pitch creep the real jet will have this just looks like it was unchanged. Track attached. DCS 2.9.8.1214 pitch creep.trk 2
ED Team Lord Vader Posted October 4, 2024 ED Team Posted October 4, 2024 Hello @darkman222 This was a fix for a very specific issue, an improvement. We are still investigating this matter. 2 Esquadra 701 - DCS Portugal - Discord
FusRoPotato Posted October 5, 2024 Posted October 5, 2024 (edited) While you guys are at it, you should probably do some digging into MIL-STD-1797A, at least around pg 170+. There's a really large section on it with numerous graphs, eqs, and descriptions outlining the formal requirements of pitch response qualities for a class 1 fighter. It doesn't detail what the F-16C's control responses look like, but provides general guidelines for aircraft in that time period. I could do a more formal presentation, but to be very brief about it, the rise times and transients for this DCS aircraft at MSL are significantly beyond the limits described in this document. Some of the examples and definitions in there might help your evaluations. The cutting down of overshoot at high altitude was commendable progress and I'd like to see both the Hornet and Viper continue to improve. Edited October 5, 2024 by FusRoPotato 3 2
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