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Issues with Cluster Bombs


Go to solution Solved by Lord Vader,

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Posted

I'm having a bit of frustration.  Have been learning the F-18C module after spending a good amount of time learning the F-16 to a T.  I have to say they both have their redeeming qualities, but I have to say the Air to Ground munitions in the F-16, for me, have always just worked and were pretty intuitive.
 

My frustration is I have tried the F-18 cluster bomb tutorial.  Even with setting the HT to 1500 feet the canister pops open almost as soon as I drop it.  That was with a RockEye.

Then I go into the mission editor and set up a quick flight with both CBU 99's and Rockeye's and the options to even set the 1500 altitude setting is missing.

All I see is a MFUZ setting of Pri or Opt.   Opt will seem to wait a little longer before it pops but regardless of what I do I can't hit a target to save my life where I can turn around and load the plane up with MK-82's and hit a solider in his head.  I've looked at youtube videos and depending on when the video was made and the patch level they have options I don't have.

I have included a TRACK file to show myself flying at around 8000 feet and dropping multiple Rockeye's.  When I set it to OPT, again, it waited longer before it popped but there is still 0 accuracy.

 

f18 rockeye problem.trk

Posted (edited)

From my own testing, I've found that the symbology calculations for VT1 and VT2 are seemingly reversed (only had time to test the FMU-140 on the CBU-99). In the attached screenshots you can see (from Active Pause) that the impact points are exactly where the cluster lands, but according to the opposite setting.

Screen_240603_031656.png

Screen_240603_031722.png

Edited by Tholozor
  • Like 3

REAPER 51 | Tholozor
VFA-136 (c.2007): https://www.digitalcombatsimulator.com/en/files/3305981/
Arleigh Burke Destroyer Pack (2020): https://www.digitalcombatsimulator.com/en/files/3313752/

Posted

There are two fuzes available for cluster bombs in the Hornet:

  • MK 339 Mod 1: it is a time based fuze with two settings
  • FMU-140: can be programmed so that the canister opens at a given altitude above the ground (it has a radio altimeter)

MK 339 Mod 1 is the only option available for MK-20 Rockeyes whereas CBU-99 can be equipped with either.

As it is now, we can conclude the employment of cluster bombs in the Hornet is broken due to the following issues:

  • CCIP calculation is wrong for the FMU-140 as noted by @Tholozor .
  • MK 339 Mod 1 fuze is difficult to use in practice and the CCIP calculation may be wrong too. Using a time based fuze is tricky as the dispersion of the bomblets depends on the bomb flight time, which cannot be calculated easily.

Hope it gets fixed for the next patch.

  • Like 2
Posted
55 minutes ago, Lord Vader said:

We are aware of some issues regarding cluster munition. Hopefully a fix is incoming to mitigate them. Stay tuned. 

Thank you.  That's good to hear.

  • 2 weeks later...
Posted (edited)

Hi ED, as attached the track, the CBU-99 for FA-18 isn't accurate in CCIP mode. With the newly updated fuse, it becomes more inaccurate. 

So the question is, is this inaccuracy the real case? How can I improve accuracy? And for the different fuse of CBU-99, one fuse can choose the explode hight (FMU-140), another can choose the time(MK339), what are these fuse difference? And how to use this different fuse for different purposes?  I guess the CCIP cursor would calculate differently according to the different fuse, right?

I also noticed that for MK20, which is also a CBU, there is only one fuse, MK339. Why there is no FMU-140 fuse

And then I tested the AUTO mode for MK20. It is absolutely wrongly deployed. I also attached a track. So, does this means the CBUs would not be deployed as AUTO mode? Shouldn't the computer of the plan can calculate the release time base on the fuse and the target and hight? 

CBU CCIP problems.trk

CBU CCIP problems2.trk

Edited by SUHANG
  • SUHANG changed the title to CBU-99, MK-20 for FA-18 not accurate
  • 4 weeks later...
Posted
6 hours ago, funkster said:

Has this been solved? Or is it still with Devs? I am assuming the later based on my own testing?

I wonder the same.  I just jumped in the F-18 and tried to Drop some CBU 99's and worthless

  • Like 1
Posted

I'm playing DCS: F/A-18C Inherent Resolve Campaign by Looking Glass

 

Cbu 99 not open and no damage on gruound ...i set on jet fuse open at 1500 delivered at 2500 in ccip no impatc

Posted
25 minutes ago, Dixie[ita] said:

I'm playing DCS: F/A-18C Inherent Resolve Campaign by Looking Glass

 

Cbu 99 not open and no damage on gruound ...i set on jet fuse open at 1500 delivered at 2500 in ccip no impatc


You don't set it in jet. You set it on the bomb in the rearm menu. All you are doing in the jet is matching the settings on the bomb. 

  • Like 2
Posted

I would guess that old missions/campaigns that were made before patch and new fuzing settings, doesn't have bombs setup correctly in mission editor and that need to be fixed by mission maker.

If you're testing bombs, do it in a new mission made after the patch.

Posted

I tried CBU-99 w. FMU-140 fuze after the latest patch and it seems accurate at the least. I would like to fiddle with different burst altitudes and default time-based fuze (MK 339 Mod 1), but I didn't have time to do it.

  • Like 1
Posted
On 7/15/2024 at 9:27 AM, Muchocracker said:


You don't set it in jet. You set it on the bomb in the rearm menu. All you are doing in the jet is matching the settings on the bomb. 

How can we know that? Where can we read what fuze in combination with what bomb to use in wich situation? You sound like he should know that he is doing something wrong...

  • 1 month later...
Posted (edited)
On 6/3/2024 at 3:27 PM, Lord Vader said:

We are aware of some issues regarding cluster munition. Hopefully a fix is incoming to mitigate them. Stay tuned. 

This didn't aged very well.
Any update on that matter?

Edited by Kah0tika
Posted (edited)

Meaculpa.
I don't know what's going on then.
They always fall short of my point of aim in both ccip and auto using the tgp.
I have no issue with non cluster munitions.
Am I missing something?

 

Edit:

I had better results in ccip with FMU-140 fuse nevertheless I'm still missing my targets in auto mode.

Example:
https://youtu.be/AGND7sTUKDM

Edited by Kah0tika
Posted

I have experienced a fall off in accuracy in a CCRP drop as well, wasn’t sure if maybe it was a correction to make it more close to reality or what.  Either way I messed around a good amount and just couldn’t reproduce the results I used to get.   

  • 2 weeks later...
Posted (edited)
On 9/14/2024 at 9:11 PM, Muchocracker said:

This issue has already been fixed chief. 

EDIT:Whoops, thought you were referring to the training missions.  Seems like you just meant the CCIP w/cluster munitions

Edited by BurningPlaydoh
misread
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