apocom

Ok, we don't know this, but it just makes no sense to use different values here. The Su27 handbook references for your own altitude with barometic altitude, and for the target simply with target height. 8 – Высота цели. 9 – Высота барометрическая текущая

Yeah, pretty sure. If you find only one source that states this differently, plz let me know. In a book I've read, the author stated that the two best features of the SU27 are IRST and data link :cry:

Ok, a few random facts: - Active radar homing missles have the highest PK - Chaff has the least effect on active radar homing missles - Chaff disturbes your radar and you are very likely loosing your lock. Thats the point of chaff. - Chaff is really huge on your radar. For a radar its way "louder" than jamming. - As long as someone illuminates the target, a semi active radar homing missle ignores chaff completely. That's just because the SARH has no active sensor and cannot even tell that there is chaff in the air. - Someone has to illuminate a target. Can even be a SAM. There is no reason why you should use your own radar. - If you loose lock of your target, the missle goes ballistic. If you gain lock again, the missle starts homing the target again. - You can reassign a target for your SARH. Conclusion: Overall a lot of SARH disadvantages are implemented and none of the advantages, but the higher range. On a side note: Even the moon can disturb your IR-Missle.

At 10km your radar sees +1000m -666m at least (overall the radar covers 1763m, and it looks like they used the additional ~100m for the upward scan area). So at 60km you see +6000 and -4000, set -2 elevation at 60km gives you now +4000 and -6000.

Ok, I've run some again some test today, just because the topic bothered me. The question is, how would you position the radar in the aircraft if you were the engineer. 1. Using some integer wouldn't help the pilot. It's not that he will start doing some sin/cos calculations during the flight (and integer doesn't help here at all). 2. The way that elevation works in this aircraft doesn't make any sense if you are using degree for the radar orientation. So I would implement the radar with at least -3.814°. This way at 15km the radar scans 1km below your level. I've run again multiple tests, and at 15km I can resolve a target that is 1km below. Why is this interesting? The SU27 is missing a feature (and some more) the F15 has. At the F15 you see your radar cone at a specified distance. With this information you can now easily calculate your needed elevation. For example you are flying at 6000m and you want to be able to scan ground level 60km ahead of you. Just set the expected target range to 60km, at this distance you know, your radar is scanning down to 2km. So just move the radar 2km down and you are at ground level. The maximum altitude you are scanning now is 10km[6 (your altitude) + 6 (60km) - 2 (radar change)]. You can do this calculation easily while flying. Again I have no idea if I've done everything correctly, I tried to be as precise as possible. Would be glad if someone can confirm or refute.

Hi, a small bug I've found while testing the radar. My altitude is displayed false. Maybe that has ingame reasons, but I don't think there is a way that the altitude of my target should be displayed correctly. Both planes are set to 5000m ASL and I'm flying over the sea (which shouldn't matter at this altitude)

That doesn't explain why my targets altitude is displayed correctly, I think it's a bug, because it makes zero sense. I've run again some test and changed my distance to the targets just to see how they (dis)appear from my radar. I'm not exactly sure if that are the correct values, because we have so many potential errors ingame (radar refresh rate, small errors in altitude and distance) that I think that is the best approximation we can get. I'm not even sure if the radar covers exactly 10° and not something like 10.05°. But with the ingame constraints I think we can't do any better. So, if I should bet some money, I would say +6.3° and -3.7° is how the radar is orientated.

Have you checked your flight with tacview? That's where my problems occurs. I have no idea what more correct is, tacview or the ingame display. The aircrafts are set to -3.7° | -3.8° | -3.9° | +/-0° | +6.4° | +6.3° | +6.2° | +6.1° According to tacview my overall error is 3m. As you can see -3.8° ,-3.9° and +6.4° are missing. First of all, I have no idea if I've done everything correct. Mostly because the values ingame differ. I belive tacview is right, just because if I put my plane at 5000m ASL, tacview tells me it's 5000m ASL but ingame its 4890m. Second, these values seems strange at first sight, but they have their own beauty. For every 10km your radar looks 1km up (more like 1.1) and for every 15km your radar looks 1km down.

Ok, I've checked my findings with tacview if I've done any mistakes, and I have. I've locked the target at 5000m (the radar told me it flies at 4999, so an ok error) and adjusted my own altitude accordingly. But my own altitude is displayed false. I have no idea why, it's neither ASL nor AGL (according to tacview). There is an error of 100m so my previous findings are false. I retested everything so that in tacview the maximum error is 7m. With this I can find a target that is -3.8° below, but not a target that is -3.9° below.

So I've done a test multiple times, everytime with the same result. I've put 7 targets in front of me (15km away), 1 reference target, then from left to right -3.6° | -3.1° | -2.6° | +/-0° | -2.4° | -2.9° | -3.4° I can resolve every target but the target -3.6°, thats why I believe the radar looks 3.5° down. EDIT: That's also close to Holimolis finding that the radar looks 6.3° up (6.5° for my calculation)

Ok, I've done different tests now. Mostly because I wanted to find out if the radar really sees 30° (it does). But I found another thing I can't explain with the radar looks 10° up. I put 2 test rows in front of me, one at 10km the other at 25km. Lets ignore the 2nd. Every aircraft was set to 3000m altitude and 900km/h. I changed my starting altitude a bit, because doing this manually means I changed the distance too much to the other aircrafts. I could see the targets on my radar from ~1800m to ~3400m. That would mean that the radar fov is not +10°, but more like +7.5° and -2.5° or +7° and -3°.

I can't find any hard evidence that the radar looks up, but your problem and Santis guide descripes it that way. The contact should fade at 14434m left/right at 25km, because thats 30°. I have to test it if its exactly so precise, I can imagine that its harder for the radar to find targets at its edge.

At 10km you scan 1763m vertical. So at elevation 1 you scan the area 6000-7763m, so you can see 1 contact (6000m). At elevation 0 you scan the area between 5000-6763m so you see 2 contacts (5000m and 6000m). At elevation -1 you scan the area between 4000-5763m so you see 2 contacts (4000m and 5000m) For your horizontal scan problem I'm not excaclty sure what you mean. Your contact is like 26° away from you. Do you use elevation at this point?

Hi, I've had the question by myself and looked it up. Different sources state that a second radar (illuminator) is used. One radar has the problem that the radar beam can never be 100% on your target. https://en.wikipedia.org/wiki/Semi-active_radar_homing section continuous-wave radar http://www.ausairpower.net/TE-Radar-AAMs.html original source https://archive.org/stream/studyofworldsnav00sara/studyofworldsnav00sara_djvu.txt this is about surface to air missles Here is a picture from a frigate with the radar (black) and illuminator (grey) https://upload.wikimedia.org/wikipedia/commons/d/df/F218_Mecklenburg-Vorpommern_Radarantenne.jpg Conclusion: I don't know if the SU27 radar has an illuminator. I don't have the handbook. But everything else that I can find about the topic states that SARH are guided by a 2nd radar. And its for me the most logical reason, why the radar warner warns you.

AFAIK the fire control radar activates another radar on missle launch that emits a very narrow radar beam to guide the missle. This second radar is detected by the electronic warning system.

So it's not only me? Good ;) I see some server (<10) but can't connect (loads forever). The exit multiplayer and refresh server list are without function. What I tried so far: Logout/login restart PC reparing local files (steam) renaming local config folder (user\games\DCS) nothing helped.

Hi RC6 thanks a lot, that was really helpful. You changed my numeration, but ok, its clear what you are answering to. Just a quick followup. I. 3. The F14 was my favourite aircraft in my youth, but I guess mostly because of the wings, carrier and phoenix. II. 5. What is the reason than for using another expected target range? At 10km you scan ~1.7km vertical, so you cannot jump over something by moving only 1 km. II. 6. I was talking more about the ASE. II. 8. The question is more, if the advantage becomes negligible. But I guess the answer is, it depends. II. 10. Hm, I will do some further testing. My problem is, that if I use the switch during the flight I'm busy for a moment with my trim and this is distracting. BTW, I'm a noob, I've had to google BFM ;) Thanks again, really helpful.

Oh yeah, forgot to mention. I use tacview after nearly every mp session. It's really a helpful tool. I use it additionally for spectating good players and try to understand their decision making (it's not always easy, because you don't always know what their system is telling them). Thanks for the reply. Hard to make up my mind, if I should choose the eagle or the flanker.

It's actually the 200th topic with noob in its name. I hope this is the right forum for this, because every question is meant in regards of multiplayer, the only game mode I'm playing atm. Hi guys, noob here how is just enjoying the game atm. I play since October 1st and jumped into multiplayer mid october (can't leave it). So after some time, I have some questions that are not answered yet, so I would be really glad if some of you could take their time to answer me some of them. Most of them are about the SU27, because I think the plane is less intuitive to fly. I. Overall: 1. What is the best way to improve my piloting skills (this is really important for me). I'm reading through a lot of stuff and try to train things (high yo yo, cobra etc...). I have the feeling that even if I would have 1000 hours in this simulator I would call myself still noob. 2. For improving is it better to focus on 1 aircraft? 3. I own A10c, FC3, and CA. I'm enjoying multiplayer the most, so any tips for my next DLC? II. F15c: 1. Is there a reason to use trackmode over TWS (AMRAAM/AIM9 loadout)? 2. Any reason to use the sparrow when AMRAAMS are not limited? 3. Is there a situation where I have to actually trim this aircraft (it flies like nailed into the sky)? III. SU27: 1. Is there a reason to use TWS? 2. Do I benefit from using the radar along with IRST (vertical scan or boresight)? 3. What FOV has IRST? 4. What does the expected radar distance do, and is it useful? 5. How much do I move the radar with the up and down keys? 6. Is there some optimal rocket shooting indicator like in the F15? 7. I've read that the thrust/weight ratio with 56% fuel is the same the eagle has (1.07), so is it a common strategy to burn fuel before arriving at the combat area? 8. Do really good players have the same situational awareness in a flanker like in an eagle? 9. Is ECM a common loadout? 10. Is there a reason to not have permanently fly by wire deactivatet? You have less trim issues. So, I think thats it for now. EDIT: Added III. 10.

Redfor Lonewolf Callsign: apocom Preferred Aircraft: SU-27, A10-C

Just made an account to say thank you for your awesome guide. I play DCS for 3 weeks now, and I'm in PvP since Friday. I've read your great guide now every single day and I'm pretty sure I know it by heart soon. I'm reading so much stuff, but your guide is by far the most awesome piece of information I've found so far. It's so incredible helpful, thank you very much.