wait for update Defaults fuzes require action in cockpit to work ?

[Anubis_94]

Hello,

 

According to Wags's video (2.50 mark below), I understood that only one, (FMU-152) is plugged to the avionic

https://youtu.be/b8TUYyFeBOg?t=171

 

But we spot that in cockpit input with default fuzes (nose: M904E, tail: M905) change if the bomb is DUD or not, at least for the mk82 and GBU12:

• mk82: if we let the MFUZE and EFUZE to OFF, the bomb is DUD.
• gbu-12: if we let the EFUZE to OFF or DLY1, the bomb is DUD

Of course, the avionic yell DUD as expected (at least for the 82, not the 12) because we didn't set bomb parameters in cockpit, but the bomb is setup on the ground, so it should explode, no matter what the plane thinks of it.

 

Tracks attached below.

 

 

 

 

 

Also, I would highlight that during the gbu12 test, vehicles eat 500lb inert bomb without apparent damage.

I doubt that it should be like that, this exists : https://en.wikipedia.org/wiki/Concrete_bomb (BDU-50 is a 500lb inert bombe)

Maybe another topic ?

Fuze12.trk Fuze82.trk

Edited July 2, 2024 by Anubis_94

[Muchocracker]

wait for the next patch. There are 5 million problems with the avionics side of the house after the new fuses were introduced 

[Tholozor]

For some additional context, the setting on the STORES page can control if the ZRF (zero retention force) solenoid inside the weapon pylon holds onto the arming wire for the bomb. You can see this in the Mk-82 video, it still has the arming wire on the bomb because it was set to OFF.

On the GBU it's a little different depending on how the weapon is put together. An arming wire always goes to the front, which enables the thermal battery for the guidance control unit, and a second wire goes into the aft section to release the fins (these two wires should be visible on the weapon prior to release on the DCS model). If the weapon has the FMU-139 or FMU-152 installed, an additional arming wire is not required with the Mk-122 electrical safety switch. Setting EFUZ to OFF acts as a "safe" option as no electrical current is applied to the switch to charge the capacitors, and the weapon will dud.

EDIT: Correction regarding the Mk-122 safety switch is explained below.

Edited July 4, 2024 by Tholozor

[Anubis_94]

This is interesting.

 

For the GBU12 and FMU139/152, if I understood it correctly, it doesn't change that setting in STORE still drive the arming state in all cases:

M904/905 with the said wire, and FMU139/152 without it (even if I would say that the capacitor, once charged, would remain charged event if I unbox the fuze in STORE ).

 

So if I put it together, for mk82 and GBU12 at least, setting a MFUZE (or EFUZE? Whatever?) still drive the arming state of the bomb ?

 

If yes, this is a work as intended behavior.

Edited July 4, 2024 by Anubis_94

[Tholozor]

I apologize, my original description regarding the Mk-122 safety switch slightly off.

When used in conjunction with the the FMU-139, the Mk-122 switch typically has two connections; an arming wire and a coaxial power cable. The arming wire is typically a few inches shorter than the coaxial cable, so it's pulled first, which closes a DC circuit inside the safety switch and permitting the capacitors inside to be charged to power the fuze (basically the weapon will not be charged until release is commanded). If EFUZ is set to OFF, no power will be applied and the weapon will dud.

When used in conjunction with the FMU-152, the arming wire for the Mk-122 is not required (but, can still be used as a redundant safety), as the fuze is completely digital (with faceplate backup settings). When weapon release is commanded, the stores system sends a coded arming pulse that charges the capacitors, arms the fuze, and sets the arm/function delay.

The stores system in the Hornet has specific codes used for each station set by the ordnance crews that tell the aircraft what weapon it has loaded and how the weapon was assembled so it knows what to do with it (this is done via the Weapons Insertion Panel on the armament computer inside door 14R).

For a Mk-82, it depends on how the bomb was assembled. Assuming it's been assembled with an M904E4 fuze in the nose, and an M905 fuze in the tail, then:

• Setting MFUZ to NOSE, and EFUZ to OFF should result in detonation based on the M904E4 setting.
• Setting MFUZ to OFF, and EFUZ to INST should result in detonation based on the M905 setting.

Edited July 4, 2024 by Tholozor

[shaji]

I'm not sure if it's a Dynamic slot issue, when picking from a saved loadout in the Dynamic slot popup, even sometimes from a customized loadout, the bombs dud as you can see in the video with EFUZ on INST, after 2 updates this is still an issue appearently. Also the MFUZ is missing for JDAMs, not sure if that's something that has to be set in the loadout now or is it a bug:

https://www.youtube.com/watch?v=2vwq1L9o-Zk

[Foka]

1 hour ago, shaji said:

I'm not sure if it's a Dynamic slot issue, when picking from a saved loadout in the Dynamic slot popup, even sometimes from a customized loadout, the bombs dud as you can see in the video with EFUZ on INST, after 2 updates this is still an issue appearently. Also the MFUZ is missing for JDAMs, not sure if that's something that has to be set in the loadout now or is it a bug:

https://www.youtube.com/watch?v=2vwq1L9o-Zk

Did you set up fuses in rearming window? Simple selecting loadouts may not be enogh, because of fuses logic changes.

[shaji]

7 hours ago, Foka said:

Did you set up fuses in rearming window? Simple selecting loadouts may not be enogh, because of fuses logic changes.

They're all setup correctly, I even saved a new loadout after the update just in case, and that same saved loadout, sometimes it works, sometimes doesn't, no idea what exactly triggers this issue. But as you can see, the EFUZ is set correctly.

More people in the forums and Discord are having the same issue.

I just ran another repair for the 3rd time after the update, we'll see if that helps, need to test again. 

Edited July 18, 2024 by shaji

[Muchocracker]

11 hours ago, shaji said:

I'm not sure if it's a Dynamic slot issue, when picking from a saved loadout in the Dynamic slot popup, even sometimes from a customized loadout, the bombs dud as you can see in the video with EFUZ on INST, after 2 updates this is still an issue appearently. Also the MFUZ is missing for JDAMs, not sure if that's something that has to be set in the loadout now or is it a bug:

https://www.youtube.com/watch?v=2vwq1L9o-Zk

It's old bombs. You need to unload them from the jet and load new ones. Then edit the fuses as you need to before saving the loadout. 

The Telltale is that the JDAM has the 904E4 on the nose which is not suppose to be there anymore (removed in the latest update)

 

Edited July 18, 2024 by Muchocracker