Fuzing - Confuzed?

[Habu_69]

So confusing. I made a tabular fuzing guide for myself. You may find it useful. I am open to any corrections/additions. In my testing (against the hardened ammo storage whse with 2 bombs) I found the GBU-24B/B to be the most effective for bunker busting at 91% destruction with the GBU-31(V) 4/B close at 76%. I also found that the FMU-152 functions correctly with GBU's at any of the available delay settings with STORES EFUZ set to DLY1.

 

 

F18 Fusing KB.pdf

Edited August 29, 2024 by Habu_69

[Mapi]

-THX!

hehehe  ME 2!

.. SELECT: 60 ms? You meen for the 152?

The 143 have 0.06 s

[marmeys]

I put tanks in the forest... so I work only penetrates trees and even in the city buildings 152 -0.18s GBU-12!!!!  
143 -not even 0.12s through trees!!!!
I think the delay only works on the 152 fuze.

 

[Habu_69]

Yes, 60 ms (=.06 sec) is a good delay setting for penetrator bombs to attack hardened targets.

[NineLine]

On 8/27/2024 at 4:50 PM, Habu_69 said:

So confusing. I made a tabular fuzing guide for myself. You may find it useful. I am open to any corrections/additions. In my testing (against the hardened ammo storage whse with 2 bombs) I found the GBU-24B/B to be the most effective for bunker busting at 91% destruction with the GBU-31(V) 4/B close at 76%. I also found that the FMU-152 functions correctly with GBU's at any of the available delay settings with STORES EFUZ set to DLY1.

 

 

F18 Fusing KB.pdf 104.56 kB · 17 downloads

 

These are the options from the sim, correct?

[Habu_69]

Correct, from DCS munitions and fuzing options. This does not include all combinations and permutations, oc, just ones I found most useful.

Edited August 31, 2024 by Habu_69

[NineLine]

1 hour ago, Habu_69 said:

Correct, from DCS munitions and fuzing options. This does not include all combinations and permutations, oc, just ones I found most useful.

 

Thanks, its a good idea, I might mention having something like that in the manual, a kind of best practices.

[Nealius]

For the GBU-31(v)4B, how do you access the fuse settings in the Hornet's stores page? Yesterday I tried them in MP via the rearm window, set the FMU-152 to 60ms as per chart, but when I selected the weapon in the Hornet's stores page there was no MFUZ or EFUZ submenu at all. The bombs dropped, however they were X-ed out and were consequently duds.

Edited September 7, 2024 by Nealius

[Muchocracker]

35 minutes ago, Nealius said:

For the GBU-31(v)4B, how do you access the fuse settings in the Hornet's stores page? Yesterday I tried them in MP via the rearm window, set the FMU-152 to 60ms as per chart, but when I selected the weapon in the Hornet's stores page there was no MFUZ or EFUZ submenu at all. The bombs dropped, however they were X-ed out and were consequently duds.

 

You caused an MC-LOAD fault condition by having another of the exact same bomb on the jet with a different fuse type configuration. That is why the SMS fuse options were missing and the bombs were X'd out. You would have also seen a crossed out "LOAD" in the advisory section at the bottom of the left DDI. 

This is also not where you enter the JPF page anyway. That is done by going into JDAM DSPLY --> Mission --> JPF at the very bottom left.

Edited September 7, 2024 by Muchocracker

[Nealius]

6 hours ago, Muchocracker said:

You caused an MC-LOAD fault condition by having another of the exact same bomb on the jet with a different fuse type configuration.

Ah looks like I did have two different fuses. Is it not possible for the system to work with mixed fuzes for all bombs, or is this only a thing for the BLU-109? It would be useful to be able to carry mixed DSU-33 and plugged GBU-38s, for example. Manual does not mention MC-LOAD fault at all.

 

6 hours ago, Muchocracker said:

This is also not where you enter the JPF page anyway. That is done by going into JDAM DSPLY --> Mission --> JPF at the very bottom left.

Lost me here. When boxing the weapon the fuse settings normally appear on the left. With the BLU-109 weapons, is it moved to this JPF entry you're talking about? The manual makes no mention of JPF at all, and I've never needed to use the JDAM DSPLY page for TOO drops of BLU-109s in the past (box weapon, select TOO, set EFUZ, TDC depress on target, drop).

Edited September 7, 2024 by Nealius

[rob10]

3 hours ago, Nealius said:

Ah looks like I did have two different fuses. Is it not possible for the system to work with mixed fuzes for all bombs, or is this only a thing for the BLU-109? It would be useful to be able to carry mixed DSU-33 and plugged GBU-38s, for example. Manual does not mention MC-LOAD fault at all.

None of the fuzing info has been updated in the manual to reflect the recent changes, so don't bother looking there.

Due to limitations with the MC it's not possible to have 2 different fuses on the SAME weapon.  So you could have different ones on GBU-12 vs GBU-38 but not 2 different fuses on GBU-12's or 2 different fuses on GBU-38's on the same plane at the same time.

[Muchocracker]

9 hours ago, Nealius said:

Ah looks like I did have two different fuses. Is it not possible for the system to work with mixed fuzes for all bombs, or is this only a thing for the BLU-109? It would be useful to be able to carry mixed DSU-33 and plugged GBU-38s, for example. Manual does not mention MC-LOAD fault at all.

It's bombs of the same type. All gbu38's on the jet have to use the same fuses, all gbu31v2's have to use the same fuses. You cannot have 2 gbu12's with one having an m905 and another having an fmu139.

 

9 hours ago, Nealius said:

Lost me here. When boxing the weapon the fuse settings normally appear on the left. With the BLU-109 weapons, is it moved to this JPF entry you're talking about? The manual makes no mention of JPF at all, and I've never needed to use the JDAM DSPLY page for TOO drops of BLU-109s in the past (box weapon, select TOO, set EFUZ, TDC depress on target, drop).

The way that part of the question was phrased was you were looking for the JPF page to manually change fuse settings

[Nealius]

Would be nice to have these vital details in the manual. Or even a detailed guide pinned in the forums. There's zero documentation on MC-LOAD errors, the matching fuze requirement, or the JPF page. And yet the customer is somehow expected to understand all these changes. 

Edited September 8, 2024 by Nealius

[tueur-a-gage]

On 9/7/2024 at 11:56 PM, Muchocracker said:

It's bombs of the same type. All gbu38's on the jet have to use the same fuses, all gbu31v2's have to use the same fuses. You cannot have 2 gbu12's with one having an m905 and another having an fmu139.

Does this apply to the same fuse with different configuration, for example 2xGBU-31 set to instant on pylon 2/8 and delay set to 180 ms on pylon 3/7 ? thanks

[Muchocracker]

6 minutes ago, tueur-a-gage said:

Does this apply to the same fuse with different configuration, for example 2xGBU-31 set to instant on pylon 2/8 and delay set to 180 ms on pylon 3/7 ? thanks

the settings on the fusing can be different. The fuses themselves cannot be different 

[graveyard4DCS]

On 8/31/2024 at 10:49 PM, NineLine said:

Thanks, its a good idea, I might mention having something like that in the manual, a kind of best practices.

Hi, 

Just for info I made a comprehensive research work on bomb fuzes. 

I reported some of it in this post: 

 

Don't hesitate to contact me directly if you want me to provide ED with info for the DCS manual. 

[Nealius]

I haven't had time to test in-game but had a thought: Should it be possible to mix DSU-33 and plugged nose bombs? Since the DSU-33 is a sensor and not a fuse, if both bombs have the same tail fuse they theoretically should work as they technically do not meet the MC-FAIL criterium of "different fuses;" i.e. both noses are plugged, both tails have the same fuse. 

If this still triggers an MC-LOAD error, what is the condition causing it?

Edited December 4, 2024 by Nealius

[Tholozor]

The Weapon Insertion Panel uses alpha-numeric codes to tell the SMS what weapon is loaded with what fuze configuration. The code for the nose well is different if the weapon is equipped with a DSU-33 or not.

[Nealius]

So it's not the fuze, but the code for the nose well that has to be the same for all bombs of the same type? Follow-up question to that would be why the DSU-33 needs that code at all when it isn't a fuse nor is the burst height adjustable from the cockpit...or can it be?

To me it seems like that DSU-33 code could be bypassed (e.g. inputting the code for a plugged bomb instead of the DSU-33) and the bomb (and DSU-33) would still function as advertised so long as the tail fuse is set.

Edited December 4, 2024 by Nealius