CBU97 dropping long in CCRP from 20K

[dooom]

i dropped my first CBUs today in the taking krymsk mission.. Both drops were long and just barely effective on the outer edge of the target box. Is this because the CBU97 is not wind corrected? How would you suggest employing the cbu 97 with greater success?

[mvsgas]

No, it is not wind corrected. CBU-105 is. Note sure if this is what cause the bomb to go long. I suggest if you want to drop from high altitude use 105.

[Revelation]

Or you can find the Youtube video posted by someone on these forums that teaches you how to input the wind parameters in the CDU so it is "corrected."

[dooom]

Thanks for the tip - i am sure it is a wind issue - i found two resources i'll add here in case someone else is having the same problem.

 

http://forums.eagle.ru/showthread.php?t=66422&highlight=wind+correct+CDU

 

LOOK AT 5:54 very hard to follow though through the keypresses.

[jacobs]

Well, this is not related to DCS A-10C but to A-10C avionics.

 

It doesn't make sense set the CBU Burst Height on the inventory page.

 

Why they didn't put it on the profile page? It would be much easier.

[JG2_Miller]

Well, this is not related to DCS A-10C but to A-10C avionics.

 

It doesn't make sense set the CBU Burst Height on the inventory page.

 

Why they didn't put it on the profile page? It would be much easier.

 

The question should be:

 

Why can you even set the Burst Height?

 

In RL CBU's are set to a fixed Burst Height. This can be changed by the ground crew and is set directly at the bomb. The pilot just inputs the Burst Height so the system knows when the bomb is going to fall apart. So actually we shouldn't even be able to change these settings in flight.

[metalnwood]

Don't know, maybe so that you can set the hof individually for each bomb on the inventory page?

[RodBorza]

Thanks for the tip - i am sure it is a wind issue - i found two resources i'll add here in case someone else is having the same problem.

 

http://forums.eagle.ru/showthread.php?t=66422&highlight=wind+correct+CDU

 

LOOK AT 5:54 very hard to follow though through the keypresses.

 

Thanks for refering to my video! :thumbup:

Is it hard to follow?

Oh yes, a little bit. This video was done wihout Track IR, so zooming capabilities were bad. Also, I did made a lot of mistakes on inputing things on the CDU. But, since it is not a tutorial per se, more like a guideline, it can help (and for my surprise, has been helping) other pilots.

 

But my excuses apart, with the help from Dynamo's post, and a little bit training it becomes fairly easy. In the newer patches (1.1.0.9 and so on) you can't really input whatever altitude you want. The CDU will round it to the next closest to the parameters inserted on its memory. The thing is that the CDU uses some models for wind correcting calculations for set altitudes, namely 0, 2000 and 8000 meters. So, if you input 10000 ft, it will actually round it to 6000 ft, because it is closer to the 2000 meter parameter.

 

But that technical stuff, that really doesn't matter when your guys are being shot at on the ground. :smartass: You are there to provide some CAS for a Marine recon unit or a "PJ" stranded under fire and all you need to do is to put ordnance at the right spot. :smilewink:

For that, I found that through trial and error that yes, wind corrected CDU HELPS to put ordnance on the target. It helps for almost anything you can carry. And it is really a thing of beauty seeing that unguided,"dumb" Mk-82 bomb being ballisticly "guided" to hit right on top of a T-72. The only thing that it doesn't make a difference is for the Mk-82 Airs. These were not made for release by a slow and low A-10, as far as the model in this sim allows it. They just go everywhere, but not where you want them to go.

 

And another good tip is the type of release. I was a very big fan of CCRP on the good old days of Jane's F-15, because it allowed for a low level fast attack pass without burdening the pilot too much. It was great. Twelve(!) Mk-82's right on the spot. But for the A-10, precision really comes in the form of CCIP.

Although in my video I never use it, my "experimentations" have shown me that for small group of targets and single tanks the best thing is to do a shallow dive and put the piper on the target.

CCRP is great also, but you really have to have control of your aircraft heading, pay attention to wind direction and the "drift" of the PBIL line. I really can't say how many times I had my target perfectly aligned 10 miles out, but closing in and at the critical final 15 seconds, the PBIL line started drifting "left" or "right" because I didn't account for small degrees of variation due to the factors I said above.

 

So, anyway, sorry because I digressed. All I wanted to say is that CCIP is the best for small units (convoys, single tanks). And to hit something, with or without CDU wind correcting help, with CCRP from angels 20, you really, really have to be at the top of your game.

But, anyway, trial and error is what makes this sim so much fun. :thumbup:

 

Edit: For LGB's, CCRP is the way to go. Align, turn Autopilot on. Count down and release. You are now a level and stable platform, and can lase that spot without worrying too much about hiting a mountain. BOOM! Another moment of utter satisfaction within this game.

Edited November 17, 2011 by RodBorza

[Mack]

I'm good with LGBs, and CCIP is good as long as I do it right. Next up, CCRP with dumb bombs. Talk like this helps.

Edited November 17, 2011 by Mack
Clarification

[Frostiken]

The question should be:

 

Why can you even set the Burst Height?

 

In RL CBU's are set to a fixed Burst Height. This can be changed by the ground crew and is set directly at the bomb. The pilot just inputs the Burst Height so the system knows when the bomb is going to fall apart. So actually we shouldn't even be able to change these settings in flight.

This. I dropped my first one the other day and it thudded into the roof of the tank :D

 

Had to manually set the second one a bit higher, seemed a little goofy because of the way the CBU-97 works, everything is triggered by a built-in radar altimeter anyway which (I assume) is built by the manufacturer to trigger in a way that would cover the most effective area with the skeets. The skeets don't have infinite range, and by letting the dispensers blow around and separate away, you'd lose target coverage in an exponential fashion.

[159th_Viper]

The question should be:

Why can you even set the Burst Height?

 

Due to the fact that, sitting behind our PC, we do not have the luxury of ground crew running about changing the setting as operational requirements dictate. As a concession, we are thus able to alter the settings In-Pit.

[Snoopy]

Even in real world you can adjust from in the pit. From the -34:

 

CBU-87/-89/-97 series munitions are fuze-initiated clamshell dispensers. For the selected cluster weapon, the fuze type, the Height Of Burst (HOB), and/or the Height Of Function (HOF) and the fuze time are entered for each cluster bomb in the appropriate submenu.

[Rainmaker]

Even in real world you can adjust from in the pit. From the -34:

 

CBU-87/-89/-97 series munitions are fuze-initiated clamshell dispensers. For the selected cluster weapon, the fuze type, the Height Of Burst (HOB), and/or the Height Of Function (HOF) and the fuze time are entered for each cluster bomb in the appropriate submenu.

 

 

I could be wrong here, but I believe that would be for PACS(my F-15 acronyms talking here) calculations for weapons release. Normal CBU's do not have a dongle or electricle connector on them which means that the jet and bomb cannot talk to each other, much like a GBU and the laser code. Therefor, they must be set on the ground. GPS and INS munitions may be a little different here.

[JG2_Miller]

Due to the fact that, sitting behind our PC, we do not have the luxury of ground crew running about changing the setting as operational requirements dictate. As a concession, we are thus able to alter the settings In-Pit.

 

Wouldn't it make more sense to have an option in the comms menu telling the ground crew to set the fuze of the CBU to a specific altitude?

[SmokeyTheLung]

I could be wrong here, but I believe that would be for PACS(my F-15 acronyms talking here) calculations for weapons release. Normal CBU's do not have a dongle or electricle connector on them which means that the jet and bomb cannot talk to each other, much like a GBU and the laser code. Therefor, they must be set on the ground. GPS and INS munitions may be a little different here.

 

I'm going to guess that the ability to set these in the pit is there for pilots to ensure that the FCC will calculate the correct impact point for whatever setting the ground crew sets the bomb to (?) I guess that's what you're getting at?

[Snoopy]

I could be wrong here, but I believe that would be for PACS(my F-15 acronyms talking here) calculations for weapons release. Normal CBU's do not have a dongle or electricle connector on them which means that the jet and bomb cannot talk to each other, much like a GBU and the laser code. Therefor, they must be set on the ground. GPS and INS munitions may be a little different here.

 

Can't say as I'm not a weapons troop...was looking through the -34 because of this discussion and this is what popped up....

 

I was actually thinking the same thing since all the settings on the actual CBU are on the outside

 

That being said it does show an "umbilical connector" for WCMDs but doesn't go into detail on what exactly that is.

[Frostiken]

I would imagine it's to power the weapon's INS :P It's not exactly running on batteries for the entire flight. Doesn't it also update from the aircraft to ensure the miserable little INS system in there isn't completely wrong after thirty minutes of flight?

Edited November 17, 2011 by Frostiken

[Olgerd]

Even in real world you can adjust from in the pit. From the -34:

 

CBU-87/-89/-97 series munitions are fuze-initiated clamshell dispensers. For the selected cluster weapon, the fuze type, the Height Of Burst (HOB), and/or the Height Of Function (HOF) and the fuze time are entered for each cluster bomb in the appropriate submenu.

 

The only fuze programmable in-flight I've heard about is FMU-152 Joint Programmable Fuze. And we don't model it in the game. For now the ability to change HOF in-flight is a compromise to give to the user any ability to adjust it at all. Actually this should be done in the payload editor before the flight.

[Olgerd]

Can't say as I'm not a weapons troop...was looking through the -34 because of this discussion and this is what popped up....

 

I was actually thinking the same thing since all the settings on the actual CBU are on the outside

 

That being said it does show an "umbilical connector" for WCMDs but doesn't go into detail on what exactly that is.

 

Umbilical connector is 1760 interface to pass target data to WCMD processor.

[Snoopy]

Thanks Olgerd!

[Conure]

Umbilical connector is 1760 interface to pass target data to WCMD processor.

 

Wow....You know a lot!

[Olgerd]

Wow....You know a lot!

 

I should know, as I was working on A-10C avionics for both DTS (desktop trainer for ANG) and DCS projects.

Edited November 17, 2011 by Olgerd

[Rainmaker]

Same...

 

The only pilot control I have heard of up until that point is the ability to select between a noze or tail fuzing, in which case it just tells the station which arming wire to pull upon weapons release.