Help appreciated on SLAM and LJDAM implementtion
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Yes auto-lasing will work for LJDAM considering it was dropped in Laser Receiver mode ON.
I see from Fox3 comment above that the GBU-54 isn’t used as LJDAM ever in the USAF, but I do know for a fact that it does work at least in 2 other air forces.
Regarding how the Auto-lasing will work for LJDAM in the real AC, I guess it can be simply as I implemented it in BMS (Sure I don’t know for a fact but I don’t see why not :))
Once a LJDAM is dropped, sure the FCC knows if the Laser Receiver is ON or OFF - So if ON, treat it as LGB and so –> Auto lase as you would for LGB (BTW, in BMS I also added a check that there is no other GBU that was dropped in the meantime, so if e.g you drop another GBU while a LJDAM with Laser Receiver is airborne, then the Auto-lasing will work only for the last bomb that was dropped). -
Hah I was just about to post that auto-lase doesn’t work:p. I dropped it in laser receive mode and the time to go countdown just got weird. It moved really slowly, jumped around a bit then at :20 sec started counting down very quickly. Autolasing never kicked on, but that could be because when the countdown seemed off I started manually lasing. I was also in the hornet in case that alters anything (I know avionics should be the same, but who knows what could make it get wonky) and trying to hit moving tanks. I’ll try again on a fixed target and not touch anything.
I also discovered that if you have multiple GBU-54s on a MER then your laser receiver settings only apply to one bomb at a time, had issues missing on the second target pass until I figured that out.
And I had the same question for Fox3TwoShip - if they aren’t using them as dual mode LJDAMs how are they using them? Or is it just that the laser receiver is always enabled but you can still drop them without lasing and use GPS guidance?
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Well, according to the code it should work, if it’s not then it’s a bug, I guess
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I stand corrected! Auto lase definitely works. Not sure what I was doing wrong before. Probably just impatient.
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We drop GBU-54s (a lot!). We just DON’T drop them with the UAI interface. They are dropped off a BRU-57 which means you have to load them as 2xGBU-38s.
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Are they then always going to look for a laser spot with the laser code set on the bomb? (I.e. If you want GPS guidance ensure nobody is lasing?). If not: why not just use 38s? Is there any future intent to get a UAI capable 2 500lbs bomb smart rack?
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Are they then always going to look for a laser spot with the laser code set on the bomb? (I.e. If you want GPS guidance ensure nobody is lasing?). If not: why not just use 38s? Is there any future intent to get a UAI capable 2 500lbs bomb smart rack?
I suppose that’s why you have the receiver off/after button. Leave it off you get straight JDAM
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I suppose that’s why you have the receiver off/after button. Leave it off you get straight JDAM
which is a UAI function and as we are discussing those are not available on the BRU-57, hence my question what this means for the GBU-54 when loaded like that…
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which is a UAI function and as we are discussing those are not available on the BRU-57, hence my question what this means for the GBU-54 when loaded like that…
Cannot speak about UAI complaint smart racks. However, you can drop it BOC, BOT (SPI slew), or as an LGB. If you just want to drop it as a JDAM then don’t lase it. Just drop it BOC or BOT like a normal -38.
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That’s what I suspected. Thanks!
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Good day, All,
I wanted to share, and seek critique, on a doctrine I developed against the SA-10, in BMS. The a/c is a Hornet C,mine and AI wingie loadout was 2 SLAM E models, 2 drops, and a AWW-9 pod, and the mission was a TACENG in BfB I created against a 4 launcher SA-10 site. I will admit I had “cheated"a bit and put the site by a nice destinctive t-shaped road junction.
My original goal was to find a way to use the SLAM as a “Super Maverick” in quick reaction Weaseling. That may be problematic , but I have found a way to use them if you know where the site is. In my TACENG the location was known, and a PPT created. My flightplan was a simple out and back off the Vinson with waypoints placed at the edge of the -10’s 50 mile threat circle.
Ingress was normal. I Fenced in at 100miles to target(SLAMs have a Maverick-like warm up time)
I continued to 80 mile to target(which seems the SLAM’s max range)and 20k altitude,designated a target on the FCR, and launched a weapon with it’s autopilot armed and pod video selected . My speed was 350 kt.I then fanned the speedbrakes and slowed to max endurance airspeed. This was not only to save fuel, but mainly to let the SLAM fly ahead.
By the time I reached the -10’s 50 mile threat range the SLAM was a good ways ahead of me .I had kept the sighting cross “on the Triangle”, so all was well. I then turned 90 deg. port and went to aft antenna. By the time that was done there was a good image on the AWW-9, so I armed the fuse, went TMS forward to put the weapon in Terminal mode, put the cross between two -10 launchers(which the bad guys had put conveniently close together), and went TMS forward to “lock”. Apparently when the pod has a good solution, that final TMS forward makes the sighting cross enlarge. The “plus sign” gets bigger. Theoretically, at that point you could maneuver, as in you had to Defend ,and the weapon would fly to target. I did not have to test that theory.
Both launchers were destroyed. I then returned to my strike waypoint(the one at 50 miles to target)
My original idea was to engage the second pair of launchers, however I got lucky. As my second SLAM approached, in the pod I saw what looked like a launcher but turned out to be the Flap Lid. It was destroyed.
The rest of the mission was a straight forward exercise in getting my wingie to 'attack my target”.
The biggest tricks to this, after practicing several time, was first not getting so target fixated that you let yourself wander into the threat circle.Secondly, launching “on the fly” can lead to an exercise in “chasing the triangle”. (RTFunM for the symbology)That was one reason I had planned a straight in on the nose approach.
Anyway, it made for a fun mission.Critique as usual is welcome.