SAAF JAS-39C Technical Data and Discussion

There should be a few more down the pipeline.

2 Likes

Then we can start buffing other areas of the Gripen that have been artificially nerfed

3 Likes

Do you have sources for you claim btw? As it stands rn the A should perform better than the C but iirc the game stats that they are the exact same in flight performance despite them weighing different amounts.

Are you discussing the FM? I’m only discussing the FM. Other areas can also be reported and fixed simultaneously and are handled by other devs.

yesn’t the typical 118 pattern countermeasure uses a denser packing of chaff compared to bol (the roll of fibre is about just over a inch in diameter, bol uses a less compressed folded box section instead of rolled tube), a single 118 has nominal weight of about 137g going by the Chemring Countermesures datasheet, a single bol flatpack is only 45g (again going by CCM’s datasheet). The advantage of bol is packing density, there’s no pyro, nor do you need room for the firing mechanisms behind every countermeasure, + the shipping is a less of a PITA

Gaijin model standard chaff in game after the PPR-26 chaff cartridge which weighs 55 g compared to BOL’s 45 g. So by the time you account for the difference in construction (metal Vs plastic) the amount of chaff in a BOL packet is likely about the same as is in a PPR-26 cartridge.

That difference in mass in no way justifies BOL having a 75% decrease in radar signature, as it currently does in game.

5 Likes

Used to work at chemring lmao, that experience was what I was basing my comments on. You do not want to know how many times I rewrote my original comment to not even give a hint of breaking NDA lmao

6 Likes

Does that make you the official Britain chaff expert on the forums :P

1 Like

That’s cool.

But as I said Gaijin explicitly model standard size chaff in game as representative of a PPR-26 cartridge, which apparently contains 40 g of chaff. That is significantly smaller than something like a 118, RR-170, or M839 but it’s what they have decided to use as their baseline. I don’t know the chaff content of a BOL packet but hopefully we can agree that while it is likely a bit less than 40 g, it is unlikely to constitute a 75% decrease in radar signature relative to the PPR-26?

You could probably make a decent case that the RR-170 etc. should be modelled as a new “medium chaff” with a radar signature between that of the current standard and large chaff. But that’s not really relevant to the comparison of BOL and PPR-26.

1 Like

Chaff already HEAVILY overperforms

Learn how to use missiles properly : )

Spoiler

/j

@InterFleet had been working on a report to fix Chaff performance idk what ever came of it.

Cool. But that’s still not a reason for BOL to be artificially worse than other chaff in the meantime.

Also is the problem with chaff itself? Or is it with radars not having their proper chaff rejection systems modeled?

3 Likes

The problem is with chaff itself iirc

Sorry. My fault. I assumed that in the game there are cars with countermeasures of different sizes, but they are calculated mixed up, like normal ones.

There are different sizes, you can see it in the plane description.
image

1 Like

Oh. Ye-ye-ye, that what i was mean.
image
This 12 is large. I agree.
image
But that 80 large too? C’mon.
Or it’s just rule “if in the fuselage, then large”?
P.S. Funny, but if you remove 2 outer pylon, then block of countermeasures was removed too. But not in the countermeasures counter.

2 Likes

They should be considered large. The typical square NATO countermeasures that go in these types of launcher are either 1x1inches (~25x25 mm) for the small ones (such as No.118s) or 2x1inches (~50x25 mm) for the big ones (such as No.218s).

These are lower capacity magazines for ALE-45 dispensers (as seen on Japanese Phantoms) rather than the BOP-G magazines on Gripen which seem to be larger. But illustrate the difference in size between between the countermeasure formats

I assume the round ones on Gripen’s pylon are the 55mm format that was on BOZ, which are indeed bigger than the 2x1s. But the point is, the ones in BOP-G dispensers could be smaller and twice as many.

The fact gaijin often choose to count 25x50mm flares as “small” alongside Russian 26mm dia., NATO 36mm dia. and 25x25mm flares as an arbitrary nerf, to half their number of potential CMs is ridiculous.

Edit:- messed up link for the No.118 brochure.

5 Likes

Understood. It seemed to me that the Gripen’s fuselage countermeasures were about the same as those on a conventional F-16. Now that you pointed this out to me, I see that I was wrong.

do you have a breakdown of the HMD symbology? like I’m guessing the 6 and 7k is altitude (in metres?)