Hi!
Got some problem with the GPU-12 in 4.33 (done A LOT of succesfull drop in DCS A-10 and 4.32, so I know the procedure)
Maybe something changed? All drops were at 16 000'/ 350kt


They always seems to fall short of the target.

The shorter I put the autolase, to closer they are, but not enough...
By default it's 16sec. With that, the bombs fall so short that its borderline not in the TGP image.
The sortest time I can put is 10sec. It's much closer, but still miss by about 100'

If I put less than 10, for ex: 7sec, the auto-lase start as soon as the bomb drops and is lasing ALLLLLL the time and the bomb lose it,s speed very quickly and falls like more than 1/8SM off....

help?

Have you set the laser to combat mode?

Yes

It might be a bug, there was a bug like this once but should have been resolved now. Maybe something has indeed changed from 4.32 but can't remember off the top of my head now. Only thing I can suggest is either follow the checklist in the manual to the letter and see if it persists, or post here a list of all the steps you are taking in detail to see if you are missing something trivial.

I managed to successfully deliver GBU-10 against a radar site. Had a couple of bad shots too when it seemed like I did everything right. Thought maybe the blast radius of a pair of -10s was making up for ananother bad shot but then I followed them in and they guided perfectly. Managed to repeat it so I don't know why the first attempt missed. In my case the miss was long.

I tried the training mission and everything is working, bombs hit with precision. In first try, I had the mode set to training and it missed, but in combat mode, all targets were hit.

@Genbrien

Make sure that your dropping condition is perfect.

You should be flying straight forward to the target when the bomb is dropped otherwise there will be inefficiency in bomb flight path and also it will consume more energy when lased.

That's the whole point of an LGB --- to compensate for errors in the launch conditions, it will guide onto the laser.

I "practice drop" LGBs with a bit of error on purpose. Sometimes, the fall line is just outside the "wingtip" of the FPM. Sometimes, the aircraft is rolled to one side, maybe pulling Gs a bit. Sometimes a combination of other factors. It's nice to know how far off "perfect" you can be and still get a precise hit. Hey, they're called "precision munitions" for a reason!

You don't have choice to change it to Combat because it's not lasing at all in training.
So, yes, it was in Combat




well, not perfect.... as Ice said they are meant to compensate errors

But when I tested I was leveled @16 000' and @350kt

Well it is lasing in training, just 1.54 micrometer wavelength instead of 1.06 (I'm rounding to rough numbers here). The shorter wavelength is more hazardous to the eye. You should find that training laser rangefinding and LST works but at a reduced range, same as DCS A-10C.

They do make Laser Guided Training Rounds (LGTR) which may or may not guide on the 1.54 wavelength (I'm not sure) but the combat articles only guide on 1.06.

How you do that? I put my laser to on (switch over the Master Arm switch), but how you put your laser to combat mode?

M-sel-0 switches it over to combat (0 ins on the number pad).

You can also do it via the icp and ded panels.

You mean the TRNG letters inside the red circle numbered 1?

If yes, I tried to click on M.SEL 0 (red circle on 2), but nothing happened.

You have to go in DED, where you set your laser code, (misc -> laser) the third row should be trng or cmbt. I switched with nr1 keypad to cmbt.

Got it working now!! Thanks a lot!

well I retested today....
Did the EXACT same procedure that I did, and always did....
guess what?

4 hits....
wtf lol ?


anyway thx all for trying to help me

So, I know I should go back and RTFM as the handling of SPI has changed in BMS 4.33, but I had more trouble with GBU-12 last night and it seemed that it might have been due to SPI problems. My usual sequence is to set the Steerpoint correctly for the target uploaded into the DTC. With FCS SOI, TMS UP to get single fixed target Track on the AG FCR, then switch SOI to the TGP and TMS UP to get to a POINT (or AREA) track. Sometimes there is a little slew first to refine the aimpoint.

Then I follow the fall line ASL in CCRP mode with consent to release.

Last night, for some reason I couldn't get the FCR into SFTT, but when I switched to TGP, the target was perfectly aligned. I did a TMS Up to get to POINT TRACK and proceeded to the Target. For some reason, the Fall Line wasn't quite aligned with the TD box (which also had a diamond in it, so it should have been PERFECTLY aligned to the Steerpoint.

Anyway I ran in, figuring the small deviation would be compensated for with the LASER guidance. Bombs released, LASER fired, and missed by a mile. I didn't think they would actually come off with consent if the solution wasn't "good enough".

So.. question.. If you use the TGP to "designate" a target and have a good tracking solution, does it matter if the FCR is not in Single Fixed Track mode? Is it even necessary to go into that mode if the TGP is already slaved to the radar cursor?

Once the TGP is source tracking for the SPI, does the CCRP track that or is it always slave to the FCR, and do you need SFTT on the FCR for a good run-in?

IMO, you shouldn't go to STT (actually the mode is called FTT, STT is for Air-to-Air mode) on the FCR when you want to use the TGP (to guide laser guided munitions).
When deploying Laser guided munitions I only use the FCR cursor in order to point/slave the TGP into the general area/location of the intended target and I only track the target using the TGP, usually using POINT TRACK but AREA TRACK will also work.
Anyway, even if you use the FCR FTT mode and after this you set your TGP as SOI and after using Track/Area modes on the TGP, the point where the TGP is aiming should be the SPI (replacing the FTT/SPI target marked by the FCR).

By the way, before going to FTT mode on the FCR was your FCR in SP (SnowPlow) mode?
This is important since if I'm not mistaken if you use the SP mode on the FCR (radar) no SPI will be generated. Make sure when using the radar to pickup and create a SPI that you use the STP mode on the FCR instead of SP before going to FTT.


I've been able to always use the Laser guided weapons with 100% accuracy (even using TGP - AREA TRACK mode) and reliability (after discovering that I had to set the laser from 'training' to 'combat' mode that is!).

Right... FTT... I knew STT looked wrong.

FCR was in STP mode. Generally always leave it there and program target Steerpoints except for CAS missions. For the longest time I didn't use FTT just did as you described, but after some issues, I started using FTT.

Will mess with it again and see what is going on.

If your steerpoint is already in the target area there is no need to use the FCR at all so I would skip that.

Just make your TGP SOI, get an area track (TMS right) and put it on the target. Then make sure you are in CCRP mode. Get a laser update before dropping (i.e. fire the combat laser for about 5 seconds to get accurate laser ranging and finalize the solution) drop the weapon when the cue comes down, make sure the laser is in combat mode and the correct code is set for the bomb and lase it in. Make sure you don't mask the laser with part of the jet (fuel tanks, wings etc).

Only decision you will have to make is if you lase all the way as soon as you pickly or only the last part of the bomb's time of fall.

For TGP mech I would recommend area track in most cases and point tracks only for moving targets or if the area track is not stable for some reason.