The R-77 'ADDER' - History, Design, Performance & Discussion

https://media.discordapp.net/attachments/955829235493273680/1143352513089769602/Screenshot_20230821_201415_YouTube.jpg

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So the first one is a co-altitude and similar closing speed of 1200 km/h or mach ~1-1.1
This means it has a potential guaranteed launch range of 90km in these conditions, and on a 60km target a time to target of approx. 75-80s.

(Pinch of salt cuz it’s based off a youtube comment)
Will do this same test with my AIM-120 model to see how it stacks.

It’s RVV-AE mockup with 77M fins

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That explains the shape / length disparity between it and what was seen on the Su-57 in that blurry image.

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Poster claims those are 3 at one fighter

I’m conflicted because I don’t know the HUD, There is what appears to be only 1 target marked, but as he fires the missiles off the numbers at the bottom disappear.

Actually, watching it I think those are weapons stations numbers coorelating to the R77-1s he’s firing
image

Assuming we’re anywhere near close to the parameters seen in the video, and using a very large pinch of salt for my AIM-120 model…

Assuming a battery life of 80s, the AIM-120A can hit a target in these conditions but it is a stretch. It hit at 60km launch after 79 seconds. The R-77-1 appears to have a higher loft trajectory and greater maximum range thanks to the additional guidance time (120s?). It also may have better time to target with a flatter trajectory but I think is accounting for a potentially maneuvering target.

So far I am only adjusting thrust to burn time and fuel weight to find an acceptable ISP for the engine in accordance with the efficiency of the HTPB propellant. My AIM-120 could still be a good ways off the real performance (in either a positive or negative way).

I think the target shown is much lower altitude, but likely also going much slower since we have no closing velocity indicator.

Either way, all this seems reasonable regardless, and yeah I think the R77 is going to use its longer time to extend its maximum range rather than shorten time-to-target, because odds are the target is going to go evasive at some point and that seems like the kind of thing they would account for, since their tactics are to do the same thing

It is hard to tell for sure, we will have to continue testing as more information rolls in. If the target is indeed much lower altitude I doubt the R-77-1 would have felt the need to loft so high up though.

That’s why I assume it’s going slower,
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The target blip looks to be rather low in the horizon, but its hard to tell how much so

It makes sense to me that it would want to extend its range to the maximum regardless, and dive on the target from high alt in case they turn away, but I dunno

(Also can I steal that mission file?)

It’s got a number of other creators components I need to credit. The Rafale isn’t mine, the AMRAAM is an AIM-120C model from another… the only thing I did was create a custom missile file for the AIM-120A using the known public data I’ve found and attached in the sources section of my other thread.

I thought the target blip was something else as well.

Seems the R-27ER in the same scenario I did the AIM-120 test can hit target in 52s.

If this is true, the gap in performance with AIM-120A and R-27ER is still so large that I honestly think it’s a good tradeoff to carry some R-27ER vs early R-77. The ER will reach the amraam slinging target before he can go full cold. AIM-120A will not be within active range at that point if launched under these conditions by the time the ER reaches him.

And if you are using Su-27, you can launch R-27ER at two separate targets simultaneously.

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huh, neat

Also yeah that makes sense to me, there has to be a reason why the ER is still around, and it gives some neat counterplay. Though if they implement R27ER multitrack the same way its currently implemented for the phoenixes, I expect it to be nearly useless but still a fun addition

Edit: now I wanna see the phoenix XD

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Would be more akin to providing interrupted STT between two targets. I suspect the Su-27 radar would have to have a period wherein it stays locked on one of the targets long enough for terminal guidance of the first missile before then locking the second target for some time as well to allow higher chance of hit. Would be more of a bomber-hunting mode I think than going after evasive fighter sized targets.

Makes sense, the guidance computer should have an estimate of time to impact of each missile via datalink, and be able to illuminate the tracks during TWS phases assuming they’re don’t both have a similar time to impact

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You can’t. Su-27 wss planned to get radar with vertical electrical beam steering, that would allow simultaneous attack of 2 targets, but this radar didn’t work properly and was rejected. Su-27’s radar is unified with MiG-29’s radar and in many ways is similar to it.

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Its loadout indication. Number of pylons 10 1 2 9

Spoiler

xf7YY

Yes. It just shows available and selected weapon. Same thing has MiG-29 in HUD in game.

That what i know
Безымянный (2)

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Depends on the Su-27 model, no?

Well, Su-27SM(2,3) with N001VEP can attack 2 targets simultaneously, but not stated if you can with SARH, so I’m not sure. Probably same as F-14 only ARH, as I didn’t see any mention it getting electric steering.

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