Minor 5V28 launch bug

[Northstar98]

Hi everyone,

I've spotted a minor issue with the newly added S-200/SA-5, when the missile launches, it does a small pitch-down manoeuvre before returning to it's proper trajectory.

According to this, the 5V28 is unguided for the first 0.45 - 0.85 s into flight, afterwhich the control surfaces enable to guide the missile.

It doesn't really affect the missiles performance, but it does clip through the launcher when firing.

I also noticed that the rear ring shaped staging element isn't present in game, and consequently the rear supports for the boosters aren't attached to anything, though this is more an object bug, the ring shaped staging element is present in the modelviewer.

Both issues are incredibly minor, and you'll only notice these when you're right up close to it and with time slowed down.

S-200V_Launch.trk

Edited October 21, 2021 by Northstar98
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[Flappie]

Reproduced and reported as a low priority bug.

[Flappie]

The first issue is fixed. Can you please show pictures about the ring issue? I can't figure it out (and I can't find the name of the .edm file eiter).

[Northstar98]

15 hours ago, Flappie said:

The first issue is fixed. Can you please show pictures about the ring issue? I can't figure it out (and I can't find the name of the .edm file eiter).

Great to hear about the first issue, it does appear to be fixed

Only thing now though is that it does a more aggressive pitch down manoeuvre, which it then recovers from, IRL the SA-5 uses 2 guidance profiles, depending on the distance to target, though this is probably its own separate issue.

Spoiler

• For targets that are less than 80 km away, the missile launches, and as soon as the missile enables (0.45 - 0.85 s after launch) the missile uses a pure PN guidance scheme, using it's low thrust mode (32 kN ?).
• For targets further than 80 km away, the missile assumes a 48° climb for 30 s, once the missile reaches the apogee of its loft, it switches to PN and its engine switches to its high thrust mode (100 kN) to accelerate. Fairly sure 48° should be the elevation angle of the launcher.

As for the ring:

Here's a picture showing the missile on the launcher, with the rear ring not present (and consequently, the rear struts for the boosters aren't attached to anything):

And here's the missile in the modelviewer, with the ring:

And without (how its depicted in game):

The model of the ring is called S-200_5b21_stage.edm in CoreMods -> tech -> TechWeaponPack -> Shapes, the argument controlling its presence is argument 4.

Getting hold of high quality launch pictures showing the rear of the missile are hard to come by, however, images of missiles on launchers or transloaders do have the ring present:

I'm fairly sure it detaches with the boosters, when they separate.

Edited October 21, 2021 by Northstar98