The AIM-120 'AMRAAM' - History, Design, Performance & Discussion

That signs of Russian main alright

11 Likes

The propellant composition of the AMRAAM is already well known because orbital ATK has made such info public. It’s how DCS got such accurate motor and thrust data for the AIM-120C-5. The study for the AIM-120A performance has estimates that were too high and had wrong data for booster.

We now also have good data for the AIM-120A/B thanks to the Korean study in my OP, which is what is used for in-game.

Also, all the nonsense off topic stuff about ‘russian mains’ can stop. BBCRF doesn’t even have top tier Russia air rn afaik. Y’all can DM about that stuff or I’ll need to get staff involved.

How is this off topic? Y’all crazy

2 Likes

Question about the aim120 What happens if it loses the target in the notch at say 7nm?

Does the missle search the potential flight path to the intercept point or does the seeker cone immediately jump to the intercept point?

I would presume it scans and tries different methods of acquiring the target

It should use iog too approach the calculated intercept Point and turn on the seaker wen in Range

Wonder if that’s is modeled

Other question if I use the aim120 in close range
Doas keeping a radar Lock with the main radar do anything or is it fire and forget only?

I believe this will guide one missile, if you drop the lock it will probably not support it with inertial information and it will just travel to last point of intercept. Not sure.

This is for in-game of course

that was not the question, the question was if the Aim120 already had a lock and then loses it. what happens then in detail?

120s should have smokeless engine. I saw i think one bug report on it with it being acknowledged. Did devs said anything else about it or we are going to have full on smoke parade with 120s even though we shouldn’t? 54C same deal.

1 Like

Seems intentional for now

With the MP change, they should probs wait a bit for the community to acclimate to radar missile combat tbh, as much as i hate the fact they’ve been dragging their feat on the AIM-54C issue for so long. Granted, there isnt any indication gaijin is looking at ever fixing anything about the AIM-54C, so were still stuck with the idiocy that is the AIM-54A being a better missile than the C in-game in every way but inertial drift…

@_David_Bowie @InterFleet any potential news on AIM-54 fixes?

Just me or the AIM-120 loses it’s energy very fast

It is a lighter missile, to be expected. Perhaps it can be looked into.

I find it to be the opposite, loses speed way slower when compared to all other fox 3’s

It doesnt, of all the radar missiles, its the one that tends to lose energy the least (in a straight line atleast).

Spoiler



Now that I look at these graphs again, the AIM-120 would even outspeed the AIM-54C given enough range and battery life, with the 6000m launch range graph actually showing this nearly occurring at 60km, which is even more questionable than the AIM-120C-5 doing it…

4 Likes

then all the other fox 3’s are ass

2 Likes

I mean, kinda yeah…

  • PL-12/AAM-4 are heavily suspected to be underperforming kinematically (probs for balance)
  • French mains claim the MICA is underperforming at range (likely has some truth to it)
  • As much as I like to rip on the R-77, its hard to say exactly how well it matches expected performance since its the only missile with grid fins. It has a planar fin drag profile ingame afaik though, so either way theres gonna be some pro’s and cons relative to irl performance.
  • Derby seems to perform the worst, but its also a short range missile adapted for medium ranges, so thats kinda to be expected. It seems to perform well at shorter ranges from what ive hear, playing second only to the MICA, but those ranges arent covered in this graph.
  • AIM-54C could easily perform better with a change to its guidance/loft code, which we know it had improvements in irl, but i dont make bug reports and the info we do have (we know it has a completely new and vastly superior guidance section and was specifically upgraded to improve its capabilities against sea skimming AShM’s and highly maneuverable fighter sized targets, implying it would need as much terminal energy as possible) doesnt fit gaijins world view, so its never gonna be fixed.

Overall though, all the loft profiles seem pretty trash and generally just thrown together, which is probably one of the biggest reason some of these missiles are struggling more than they should at range.

2 Likes

what a surprise pl12 is underperforming… didnt see that coming

Might be a lil outlandish, but how would the AMRAAM D perform here hypothetically compared to IRL?

I can make some in-game custom missile files to test hypothetical future missiles.