BRU-33 release logic: 2 bombs dropping from same wing

[Nealius]

Normally when I carry two BRU-33s or four BRU-33s and drop bombs in pairs, they will drop one bomb from each wing, but today I had something funky happen and two bombs dropped from the same wing.

 

My payload was 1x centerline fuel tank, 6x Mk82s, 2x AIM-9Ms in a configuration commonly used by Hornets in Desert Storm. The inboard pylons had one BRU-33 with two bombs each, and the outboard pylons had one bomb each:

 

 

As you can see I'm dropping ripple pairs with 75' spacing between each bomb, which typically releases one bomb from each side to keep things symmetrical.

 

However, with this payload of 6 bombs, one bomb was released from the outboard pylon and one bomb was released from the inboard BRU-33 from the same wing, making my aircraft imbalanced. Here's my STORES page after the first release:

 

 

Should I be using the STEP key to select a certain store to get them to release from both wings, or is something buggy with this particular payload combination?

[Tholozor]

Change your MULT value to 2. If I remember how it works, QTY is the total number of bombs that will be release, MULT controls how many stations will release bombs.

 

e.g. QTY 2, MULT 1 should drop 2 bombs total from 1 station.

QTY 2, MULT 2 should drop 2 bombs total between 2 stations.

[Eagle7907]

BRU-33 release logic: 2 bombs dropping from same wing

 

Change your MULT value to 2. If I remember how it works, QTY is the total number of bombs that will be release, MULT controls how many stations will release bombs.

 

e.g. QTY 2, MULT 1 should drop 2 bombs total from 1 station.

QTY 2, MULT 2 should drop 2 bombs total between 2 stations.

 

 

 

So would another way to think of it is QTY = number of commanded consecutive releases, MULT = how many in each commanded release? Or do I have it backwards?

 

 

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[Rennes]

Change your MULT value to 2. If I remember how it works, QTY is the total number of bombs that will be release, MULT controls how many stations will release bombs.

 

e.g. QTY 2, MULT 1 should drop 2 bombs total from 1 station.

QTY 2, MULT 2 should drop 2 bombs total between 2 stations.

 

This is not true. The only thing setting MULT to 2 would do is cause them both to drop at the exact same time with no interval between them.

 

I can't think of a reason that both would drop from the same wing.

[Nealius]

QTY x MULT = total number dropped. Therefore QTY 2 MULT 2 would drop four bombs. QTY 2 MULT 1 drops two bombs, and is proven to do so with other payload combinations (i.e. 8x bombs on 4 BRU-33s, 4x bombs on 2 BRU-33s, 4x bombs direct on pylons).

 

 

I went back and looked at my video, I had the outboard single bomb selected. I will try today with the BRU-33 racks selected on my first pass instead and see what happens.

Edited January 29, 2019 by Nealius

[Rennes]

QTY x MULT = total number dropped. Therefore QTY 2 MULT 2 would drop four bombs. QTY 2 MULT 1 drops two bombs, and is proven to do so with other payload combinations (i.e. 8x bombs on 4 BRU-33s, 4x bombs on 2 BRU-33s, 4x bombs direct on pylons).

 

 

I went back and looked at my video, I had the outboard single bomb selected. I will try today with the BRU-33 racks selected on my first pass instead and see what happens.

 

Nope, QTY = Total number dropped. MULT = how many drop per interval.

Edited January 30, 2019 by Rennes

[Eagle7907]

Nope, QTY = Total number dropped. MULT = how many dropper per interval.

 

 

 

Ah! That sounds correct.

 

So setting QTY 2 MULT 2 it will drop a pair then drop another pair for a total of 4.

 

QTY 3 MULT 2 drops three, then three, total six

 

QTY 2 MULT 3 drops 2, drops 2, drops 2, total six

 

 

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[Py]

Nope, QTY = Total number dropped. MULT = how many dropper per interval.

 

Ah! That sounds correct.

 

So setting QTY 2 MULT 2 it will drop a pair then drop another pair for a total of 4.

 

No you misinterpreted Rennes, QTY is the TOTAL.

 

QTY 2 MULT 2 will drop a pair for a total of 2

[Nealius]

I see. The MULT function is rather confusing due to its nomenclature. I wish they had named it something else.

 

Anyway, I ran three tests with the 6xM82 load with 500ft intervals so that the release logic could be easily seen:

 

Here's the original issue with the single outboard bomb selected first.

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Here I tried selecting the inboard BRU33 and the release logic worked the first time, but the system automatically selected the single outboard bomb afterwards, causing a return to the original issue.

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And here I had to manually select the BRU33 stations for both drops to maintain a symmetrical release pattern.

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[Eagle7907]

BRU-33 release logic: 2 bombs dropping from same wing

 

No you misinterpreted Rennes, QTY is the TOTAL.

 

 

 

QTY 2 MULT 2 will drop a pair for a total of 2

 

 

 

Okay. Wow. I was way off understanding this. Thanks!

 

 

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[Rennes]

"Unable to step through all GBUs loaded, Incorrect release sequence are fixed."

 

Fixed in the next update.

Edited January 30, 2019 by Rennes

[Nealius]

Just checked. It is fixed.

Edited January 31, 2019 by Nealius

[Nealius]

Okay, the release sequence is fixed for this particular config, but the bug still remains in another common Desert Storm config:

 

2x wing tanks, 2xBRU33s with 2 bombs each, 1 bomb centerline (total 5 bombs). Bombs will step from left BRU33, right BRU33, then centerline. Shouldn't it prioritize BRU33s first, then select centerline last?

[Ironwulf]

The way to look at it is

 

"Release QTY bombs in multiples of MULT, with INT feet between multiples"

 

So QTY 4 MULT 2 INT 300= "Release 4 bombs in multiples of 2 with 300 feet between" = 2 pairs dropped 300ft between pairs

 

This is why if you select QTY4 MULT4, you don't get INT because the entire quantity getting released at once.

[Nealius]

Yes, we've established what QTY and MULT are, but that is not the issue here. The issue is the system stepping through bombs in such an order as to cause imbalance.

[DirtySanchez]

The graphic is ambiguous for mixed carriage. The explicit answer is in the NTIP manual, which is not available publically.

 

Reading between the lines, stores carried on BRU-32 parent racks would follow the same initial pattern as the BRU-33 sequence, starting with the centerline.