Unable to hit a bridge using CCRP

[pengjn]

So i'm a day 1 Hog driver and I've been trying to knock out a bridge with GBU12s and GBU38s (if memory serves). I mark the bridge on the pod and hit TMS up, which I think makes it SPI. Then I enter CCRP, line up, wait for the count down and pickle the release until the bomb comes off. I never hit it, not even that close. Any simple training vids? I've found A LOT online but not been able to find my problem yet.

 

 

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[MadDog-IC]

So i'm a day 1 Hog driver and I've been trying to knock out a bridge with GBU12s and GBU38s (if memory serves). I mark the bridge on the pod and hit TMS up, which I think makes it SPI. Then I enter CCRP, line up, wait for the count down and pickle the release until the bomb comes off. I never hit it, not even that close. Any simple training vids? I've found A LOT online but not been able to find my problem yet.

 

Sounds like your doing it correctly for bomb release, but note:

 

If using the Gbu12 (laser guided), are you auto lasing or manually lasing the target approx 8-12 seconds before impact.

 

If using the Gbu38 (gps guided), you must have a spi set for them to release, once released they will follow to the coordinates recieved from the SPI.

 

Good Videos to watch are from Banyap's (ON THE RANGE)

 

Cheers, Ian.

[Gliptal]

Just a sidenote, SOI as SPI generator is TMS UP LONG.

[Blackeye]

Check your TAD - green diamond and wedding cake need to be aligned for SPI to be at the TGP target (button to press is as noted TMS up LONG).

See http://forums.eagle.ru/showpost.php?p=2606197&postcount=25

Edited March 5, 2016 by Blackeye

[Sierra99]

So i'm a day 1 Hog driver and I've been trying to knock out a bridge with GBU12s and GBU38s (if memory serves). I mark the bridge on the pod and hit TMS up, which I think makes it SPI. Then I enter CCRP, line up, wait for the count down and pickle the release until the bomb comes off. I never hit it, not even that close. Any simple training vids? I've found A LOT online but not been able to find my problem yet.

 

 

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TMS UP - LONG sets SPI.

 

Also, by default GBU-12s are set for CCIP release...you must enter the profile page, select CCRP and save it for the proper release cueing.

 

You also don't mention lasing...make sure the laser is armed and you start lasing about 10 second prior to impact.

 

Hope this helps

[Lucky]

TMS UP - LONG sets SPI.

 

Also, by default GBU-12s are set for CCIP release...you must enter the profile page, select CCRP and save it for the proper release cueing.

 

You also don't mention lasing...make sure the laser is armed and you start lasing about 10 second prior to impact.

 

Hope this helps

 

You don't have to enter the profile page to set CCRP. You can push the Master Mode button to bring up CCRP mode from CCIP mode.

[SharpeXB]

Can you hit other targets correctly but not bridges?

When setting the SPI, make sure you're marking the ground under the bridge, since the TGP just sees the ground and not the bridge surface. Also if you are setting the SPI at a large slant angle make sure the laser rangefinder is on, just press the Laser button and see the L flash.

GBU-10/12s just need a point track, GPS guided bombs need a SPI

I usually just set Auto Lase to 10 seconds for laser guided bombs.

Finally since all these bombs actually free fall for most of their flight, it can help to set the wind correction on the CDU

If you're only having trouble with bridges it's probably the thing about targeting the ground and not the bridge itself.

[McBlemmen]

TMS UP - LONG sets SPI.

 

Also, by default GBU-12s are set for CCIP release...you must enter the profile page, select CCRP and save it for the proper release cueing.

 

Or switch to CCRP mode with the master mode button

[paulca]

Just a quick Q, but why would you drop a laser guided munition in CCIP mode? I figure CCIP mode is only really of use if you must do a dive approach such as hooking inverted over some terrain into a hot target Top Gun style.... or if you don't want to have to lock stuff up as SPI. However in the first instance there won't be time for the laser guidance to do much and in the later you don't have a SPI to fire the laser on.

[McBlemmen]

Just a quick Q, but why would you drop a laser guided munition in CCIP mode? .

 

Well i'm sure most people will use CCRP in most cases but CCIP has it's uses. For example when bombing a target marked by smoke that's being lased by someone else and you are flying without TGP or don't have time to get the target on your tgp and there's no datalink with the FAC.

[pengjn]

Unable to hit a bridge using CCRP

 

Ah ha! I didn't realise that the 38 was GPS guided and the 12 laser guided. I will have a bash with the laser.

 

 

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Edited March 6, 2016 by pengjn

[Sierra99]

You don't have to enter the profile page to set CCRP. You can push the Master Mode button to bring up CCRP mode from CCIP mode.

 

Ya know what Lucky I didn't know this would work...i thought since you get a "USE CCRP" message in the HUD if you try to drop various weapons in CCIP you had to set the value on the Profile page.

 

Thanks

Sierra

[Xavven]

Ya know what Lucky I didn't know this would work...i thought since you get a "USE CCRP" message in the HUD if you try to drop various weapons in CCIP you had to set the value on the Profile page.

 

Thanks

Sierra

 

You get that message when using JDAMs (GBU-38 and GBU-31)

[WildBillKelsoe]

change TGP to LATCH ON and be higher than 12K.

LASER on

TMS UP long

POINT track

[Yurgon]

GBU-10/12s just need a point track

 

POINT track

 

What is it with point track? OP talks about bridges, they're not usually in the habit of relocating after acquisition... :music_whistling:

[LNR212]

have a look at this, this is the best how-to for bombing-beginners (with pictures):

 

http://simhq.com/forum/ubbthreads.php/topics/3171145/How_to_use_weapons_-_Picture_g

 

or here as pdf

 

A-10C GBU Guide.pdf

 

this helped me a lot...

[hansangb]

Thank you LNR212!

[Outlaw24]

You also might want to check the TISL panel (in front of the stick) to make sure the code entered is the same as on your DSMS page for the bomb, the default on the DSMS is 1688, but lately when I check the TISL the code reads 0000, they have to be the same, just a side note.

[Mike5560]

The TISL controls the no longer used Pave Penny pod. It could only detect laser energy and did not have a laser itself..... So I dont see how having a mismatched code would affect your ability to lase through the TGP.

[pengjn]

Unable to hit a bridge using CCRP

 

Thanks everyone. Mucho success with GBU12's. I wasted a few taking out trucks to practice and they are pinpoint...now that I've provided them some laser to guide on. A couple of questions if I may... The initial lase (is that even a word?) is to establish range and accurately set the SPI...does Latch On impact this step or the post drop step? Does the Auto Lase option trigger the laser for guidance at the point of release for the specified number of seconds or the predicted time of impact minus the number of seconds specified? Either way surely an arbitrarily high number would seem sensible rather than trying to calculate the approx bomb fall time??

 

 

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[Blackeye]

The initial lase (is that even a word?) is to establish range and accurately set the SPI...does Latch On impact this step or the post drop step?

It shouldn't however make sure you turn the laser off when dropping the bomb. You want it to fly ballistic at first because if you guide it right after release it will run out of energy and fall short.

 

Does the Auto Lase option trigger the laser for guidance at the point of release for the specified number of seconds or the predicted time of impact minus the number of seconds specified?

 

Time before calculated impact.

 

Either way surely an arbitrarily high number would seem sensible rather than trying to calculate the approx bomb fall time??

 

Nope as said before you don't want to start the guidance too early. 10-15 seconds usually work fine.

Edited March 8, 2016 by Blackeye

[McBlemmen]

The initial lase (is that even a word?) is to establish range and accurately set the SPI...

 

Really not necessary with laser guided weapons, only GPS guided weapons. (Not exacly an answer to your question , but still.)

 

Does the Auto Lase option trigger the laser for guidance at the point of release for the specified number of seconds or the predicted time of impact minus the number of seconds specified? Either way surely an arbitrarily high number would seem sensible rather than trying to calculate the approx bomb fall time??

 

Yes that's how auto lase works , but under certain circumstances lasing too early can make your bombs miss since they will waste potential energy homing in on the laser while too high in the air. Personally i always use 10 seconds, but anything in that ballpark will do. I've used between 6 and 15, eventually i settled to just stick with 10.

[Lucky]

It shouldn't however make sure you turn the laser off when dropping the bomb. You want it to fly ballistic at first because if you guide it right after release it will run out of energy and fall short.

 

That's not what I've seen. I've been doing it that way as long as I can remember. It still hits right on target.

[marluk]

First of all, Lucky, I hate you because you have the same nick as me so I couldn't take it at the time I was creating forum account. ;)

 

Before dropping GBU-12, I always set up profile options AUTO LASE - ON and LS TIME - 10 seconds and CCRP mode. Works good for me.

Here is tutorial by Wags:

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Tip: If you forget to turn laser on prior to dropping bomb, error messages will appear on MFDs. Don't panic! Just turn on laser switch and press Ins key on keyboard. This will turn laser on manually.

 

Good luck!

Edited March 9, 2016 by marluk

[Yurgon]

Before dropping GBU-12, I always set up profile options AUTO LASE - ON and LS TIME - 10 seconds and CCRP mode. Works good for me.

 

I used to do that too, but don't do it any longer (except for the CCRP part). If JTAC or other flight members want to do buddy lasing, I would either have to have two separate profiles at hand, or update the profile prior to my attack run. When the TGP is set to "Latch On", all it takes to lase myself is the flick of one button, and unlike other things, I don't usually forget to do that. ;)

 

In essence, a profile without auto lasing offers more flexibility and has almost no downsides IMO. :smartass:

 

Obviously, though, this is mostly relevant in MP. If I was flying SP exclusively, I'd probably do it exactly as you described because activating the laser is just one thing less to worry about then. :)