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Everything posted by DarkFire
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OK, I did two further possibly more representative tests, one using the R-27ER (x2, and 2xR-73, and cannon fire, let's not go there :disgust: ) and the second using the R-27ET. For both tests I was at 10,000m altitude approaching head-on to a KC-135 which was at 1,500m altitude and 650 Km/h TAS. In each case I was up at 10,000m and had been accelerating in maximum AB for some minutes. For the R-27ER test, I launched at a range of 52.2 Km. My speed was 2,380 Km/h = M2.2. The missile immediately performed a 9.1G push-over and descended towards the target. It bled off so much speed that it eventually kinematically failed to reach the target, falling short by maybe 20m or so and passing under the target. Close enough to be considered representative of a successful missile flight path. The missile reached a maximum speed of 5,086 Km/h = M4.63 at 8,686m ASL. For the R-27ET test, I launched at a range of 34.2 Km. It should be noted that it was only at this point that the missile seeker acquired the target and in terms of range this was close to being a launch at Rtr. At the time of launch I was at 2,225 Km/h = M2.06. In this case the missile immediately performed a 12G push-over and again descended towards the target which was subsequently directly hit. The missile reached a maximum speed of 4,665 Km/h = M4.30 at 9,548m ASL. For anyone wanting to plot the missile flight profiles, the ACMI files are attached.
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Hydro failure after switching off autopilot
DarkFire replied to BattleAxes Skinner's topic in Su-27 for DCS World
Hmm that is strange. I've never experienced this issue in single player. Have you checked to make sure that only 1 physical axis is mapped to each control axis? E.g. make sure you don't have a game controller mapped to pitch & roll as well as your HOTAS. That's a frequent source of control issues. -
Hydro failure after switching off autopilot
DarkFire replied to BattleAxes Skinner's topic in Su-27 for DCS World
Ah OK. Does this happen in single missions or multiplayer or both? The reason I ask is that there is definitely something odd going on in multiplayer with regards to ACS reset. The only time I ever have to reset the ACS in single player is when I've yanked the stick while the autopilot is engaged. This isn't the case in multiplayer: a few days ago the whole ACS system went out of alignment, with no warning, as I was coming in to land and I hand't been using the autopilot at all. Trouble is, I can't re-produce the problem so I have no idea what's causing it unfortunately. -
Hydro failure after switching off autopilot
DarkFire replied to BattleAxes Skinner's topic in Su-27 for DCS World
You'd know if you broke a wing - control is usually very badly degraded even if you're lucky and only snap off the outer portion of one wing. Snapping off both wings is deadly - if you're lucky you'll be able to eject. If not you might instantly black out from -G at which point it's game over. This table shows the maximum permitted G values: Shown differently, this is the maximum allowed G versus mach number. Notice the dip in the transonic region: Note that the table and the above graph both come from the actual Su-27S manual as produced by Sukhoi. Tests that Ironhand carried out have proved that the airframe will fail at somewhere between 1.3x and 1.5x the maximum allowed G value. It's also true that repeated over-G conditions will weaken the airframe and will lower the G value at which subsequent failure occurs. In relation to your original question: when you experience problems with control, is there a red warning light illuminated somewhere under the HUD? Try resetting the flight control system with left-alt-9. -
There isn't an in-game setting to adjust the HUD font size, though I would imagine that like most parameters in the game the value is buried in a LUA file somewhere.
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For comparison, I took an F-15C up to 45,500 feet and launched an AIM-120C. At the point of launch the F-15C was at 2,607 Km/h = M2.45. The AIM-120C reached a maximum speed of around 6,060 Km/h = M5.70. The aerodynamic range of the missile was a very impressive 118Km. Conclusions? Without looking at published data I'd say that the motor on the 27-ER is probably more powerful, giving it significantly higher acceleration and marginally higher top speed, but the AIM-120C appears to have significantly less drag and therefore more range. As both missiles currently are in-game, the AIM-120C also appears to have a more 'sensible' flight profile, though I can't seem to easily find any reliable published information on missile flight profiles. Interesting test. By the way, this was something like my 4th flight ever in an F-15C so my piloting will necessarily leave a bit to be desired in terms of quality! Edited to add: just realised what I've done. Wasn't intending this to become yet another R-27 v AIM-120 thread :(
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Today's Update Further Cockpit view Issues
DarkFire replied to SUNTSAG's topic in View and Spotting Bugs
Same here. In the Su-27 the centre position seems to be rotated about 20 degrees upwards which makes centring awkward. Nice to see the tilted rotation fixed though. -
Agree. She tends to lose a bit more speed now in tight turns, but at corner speed the turn radius and turn rate are phenomenal. Coupled with the HMS and R-73... :joystick:
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The view angle limitation may be a realistic feature for certain aircraft. I remember this topic coming up for question waaaay back in the days of Su-27 Squadron Commanders Edition ('96? 97 possibly?). The answer then was that in the Su-27 the pilot is strapped in so securely that twisting their upper torso is impossible, and the pilot's view angle is therefore limited by head rotation. Glad the slanted view angle got fixed!
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[RESOLVED]annoying ground load micro pauses -SOLVED
DarkFire replied to adrianstealth's topic in Game Performance Bugs
Are you using a mechanical hard drive or an SSD? I used to have exactly the same issue when I had the game installed on a mech drive. Reinstalled on an SSD and the problem disappeared. For comparison, I'm on an ancient i7 960 with 16 Gb RAM and a GTX760. -
Interesting, but that's not the issue with the Su-27. The problem, if it is a problem, is that the roll inertia is high, i.e. during a roll when you move the control column to the neutral position it takes an unusually long time for the roll to actually stop. The cause I would imagine is the maximum force developed by the control surface actuators vs. the high angular momentum of a rolling aircraft caused by the widely separated engines and heavy wings (full of quite a lot of fuel).
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Another subtle and great improvement in 1.5.4 (HUD/HDD)
DarkFire replied to Bourrinopathe's topic in Su-27 for DCS World
Yep, helps to make things more obvious when you take a quick glance at the HDD. HUD is also clearer under certain circumstances. Nice work by ED :thumbup: -
R-77 + R-27ET + R-73 = very nice loadout!
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Ooh interesting! I'll have to see what I can dig up...
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Not sure if they refer specifically to the A-10, but do a google search for "Joint Pub 3-50.21" which is a joint CSAR manual. It does however have a huge pile of information relating to air tasking orders and examples of mission briefings in the appendices. Doesn't appear to be a classified document so should be freely available.
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I'd be very surprised if any VKS Su-27S models ever carry anything beyond the R-27E/ER/T/ET versions. As a cost saving measure there wouldn't be much point: no immediate threat of a large-scale war against NATO and by the time that the T-50 / PAK-FA is in routine squadron service the RVV-AE or R-77ER (or whatever that Vympel project is called this week) will likely also be ready for service. All the photos of Su-35's from Syria appear to show them carrying bog-standard R-27R's though having said that they probably don't need anything beyond the 27R for that deployment.
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Effect of rocket illumination on enemy detection capability
DarkFire replied to BaD CrC's topic in Mission Editor
I think this topic was explored before, about 6 months ago. Can't find the thread now but if memory serves the general consensus was that AAA systems that don't have some sort of IR / EO / RADAR guidance, e.g. a truck-mounted or emplaced Zu-23, can't see aircraft at night and therefore won't shoot at them. Not sure if aircraft lights make a difference, they appear to make player aircraft more visible to AI aircraft but I don't know if the same is true of AA systems. -
Yep, liking the new gun sound - feels like a properly meaty 30mm cannon. I'm also deeply in love with how smooth & precise ground steering has become - the new nose wheel steering is a joy to use. Roll inertia is probably a matter of getting used to it. Ultimately I can kind of understand that the Su-27 has quite a high roll inertia, after all the engines are relatively widely spaced, the wings carry quite a weight in fuel and for a fighter it's generally a big lump of a thing. I also like the subtle stall buffet that sets in at low airspeed and >20 degrees AOA. Helps you to 'feel' what AOA & speed the aircraft is at.
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Welcome to the Su-27 fanatics club :pilotfly: :joystick: Yep, there have definitely been some changes! Trim is now even tamer. :thumbup: Nose wheel turning is now significantly smoother. :thumbup: Track IR support feels... weird. :unsure: Dat roll response though... Ugh. :glare: :disgust: The aircraft wallows horribly around the roll axis, even more so at low air speeds. Gone is the super-precise roll control that we used to have and the significant cross-talk between rudders & ailerons is back in full force. The thing's still nice and stable during finals which is good, but that roll response... Nasty. If it's realistic then so be it, we'll have to get used to it.
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What is "Toggle Console" for Su-27 in FC3
DarkFire replied to DieHard's topic in Su-27 for DCS World
Might be OK for something like a trim knob or radar scan adjuster. -
Good kills! Was one of those F-15's trying to shoot at you with his gear down??!! Loved the music by the way, what is it? For smooth control, firstly I'd recommend using control axis curves, somewhere between 15 and 25 units for both pitch and roll. This will help you make precise but smooth inputs. Next, feet off the rudder! The ACS on the Su-27 will perform co-ordinated turns for you, you don't need to touch the rudder. Nearly the only time I ever touch the rudder in the Su-27 is when I'm on final approach for a cross-wind landing. I'd also recommend flying more slowly for conducting WVR combat. The corner speed for the Su-27 is roughly 700 - 770 Km/h depending on weight & load. Flying above 1100 Km/h will give you a very large turning circle & also makes it much easier to over-G the airframe. Finally, the ACS on the -27 doesn't react well to making inputs in multiple axes simultaneously, i.e. roll then pull rather than doing both at once. Hope this helps. Great video!
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Can't find contacts at close range
DarkFire replied to VAF [136] Striker's topic in Su-27 for DCS World
Could it be that the targets you have locked are reacting and beaming you? Do you see any aspect change jest before they disappear? Medium PRF is better than high for side-on or rear aspect targets but they can still enter the doppler notch & disappear from your radar.