[REPORTED] Inconsistent accuracy between GP bomb types

[KTFBGB]

This thread says AUTO bombing is [CORRECT AS IS], yet this thread acknowledges that AUTO bombing causes GBUs to go long....confusing....

 

Ummm....... we’ve been discussing the MK82, not any of the GBU series.......

[BIGNEWY]

This thread says AUTO bombing is [CORRECT AS IS], yet this thread acknowledges that AUTO bombing causes GBUs to go long....confusing....

 

Hi

 

This is laser guided bombs from high altitude not catching the laser.

 

It is a different issue.

[Nealius]

If the GBU isn't catching the laser, and it's released in AUTO mode on the TPOD's marked location, then it would fall just like a dumb Mk8x released in AUTO mode, would it not?

[ShalashakaDS]

Ok, so i went ahead and created a very simple mission to test this. I put some static vehicles arranged in a X about 300ft wide. I put a waypoint right in the center of the X so i would not have to use the hud to designate every time and risk misplacing the diamond. There was no wind, temperature was 20 degrees celsius and QNH 29.92, the standart when you create a new mission on the ME. Tracks attatched. I made my runs as short as possible so to make replaying the tracks more consistent. Testing was made using the latest open beta branch. Tested with the mk-83 and 84. Every run starts about 10000ft, i set up my bomb and set the waypoint as my target, at about 20 seconds to release i start a 5 degress dive. I know my technique is not perfect but the bombs performed consitently for me, even with less than ideal releases.

 

mk-83test1Single.trk

mk-83test2Single.trk

mk-83test3Single.trk

 

mk-84test1Single.trk

mk-84test2Single.trk

mk-84test3Single.trk

 

So, i didnt expect pinpoint accuracy but what i found was that the mk-83 hits very consistently around the center of the X, always good enough that i get at least one vehicle destroyed, while the 84 always hit short, not even damaging anything. As i said, didnt expect pinpoint accuracy so i also made a couple of runs releasing multiples, 4 bombs, 100ft spacing. Same result, mk-83 hit about center of the X, mk-84 short not damaging anything.

 

mk-84test1Ripple4.trk

mk-83test1Ripple4.trk

[Rainmaker]

If the GBU isn't catching the laser, and it's released in AUTO mode on the TPOD's marked location, then it would fall just like a dumb Mk8x released in AUTO mode, would it not?

 

Completely different aero profile. Are you talking real life or the sim?

[vctpil]

I forgotten the Jestream video (probably one of the best and the most interresting) and decided to test the AUTO mode during a dive attack, 45° and 30°.

 

AND IT WORKS WITH THE MK82 !! Several tests later, I was a able to put the mk82 sometimes on the target, sometimes close enought to damage it.

 

So, finally, CORRECT AS IS is apparently the correct label for this threat.

 

But the question now is : is the AUTO mode supposed to work in level flight ?

[flywaldair (Skynet dev.)]

Good to hear!

[Deano87]

My issue with Auto mode is not that its not pinpoint accurate ( I didn't expect it to be ) its more the fact that each different type of bomb misses consistently in a different way. 82s end up long and 84s end up short. I imagine that the weapon profile would take into account the differences in the way each bomb would fly and auto mode should be able to get it "In the ballpark" rather then a one size fits all setup we seem to have at the moment.

[ShalashakaDS]

My experience is consistent with Deano87's, the 83 is very accurate and the mk-84 is always short. I did some testing with the mk-82 in the same mission i posted above, it seems to perform closer to the 83.

Edited August 2, 2019 by ShalashakaDS

[vctpil]

Mk82, mk83 and mk84 all in the target (or very close).

 

I was excited like Riel in Jetstream.

[ShalashakaDS]

Did you fire multiples or singles? what altitude? level delivery or in a dive?

[ShalashakaDS]

Since no one gave a about the tracks i posted here are some screenshots. Same mission as the tracks, same delivery profile every time.

 

mk-82

 

mk-83

 

mk-84

 

My target point is exactly on the center vehicle. All bombs where released at about 8000/7500ft starting from 10000ft with a 5 degrees dive. These are only a few screenshots but ive made a lot of runs and it seems consistent. The 83 is the most accurate one, alway hit smack on the middle, inside the area marked with the red circle. The 82 hits close enough, but its always a little longer, i couldnt get a single one (when firing singles) to hit lower than the center of the X. The 84 always way shorter, not a single kill. Using latest beta version.

 

P.S. : ops, sorry BIGNEWY for the foul language :D

Edited August 2, 2019 by ShalashakaDS
1.1

[BIGNEWY]

No problem, I sent you a PM

 

We are keeping an eye on the issue, and I am testing. However in my own tests it seems ok for me.

[ShalashakaDS]

Thank you very much for taking a look into it. I dont discard the reason being user error, but i tried to be consistent with my delivery. Same procedure, same throttle setting, same set up for the bombs, only difference every time is the bomb loaded, yet i cant hit with the 84 even firing 4 with 100ft spacing.

[vctpil]

I was using single release, 30° (18000ft AGL) and 45° (24000ft AGL) dive.

 

Apprently, a level flight of even a 5° or 10° does not work. Is the AUTO mode supposed to work in level flight ?

Edited August 2, 2019 by vctpil

[Deano87]

I was using single release, 30° (18000ft AGL) and 45° (24000ft AGL) dive.

 

Apprently, a level flight of even a 5° or 10° does not work. Is the AUTO mode working in level flight ?

 

It should, Yes. It should also work reasonably well for toss bombing too.

[vctpil]

Tested with mk83 in a 15° dive angle (I know, I should not use this kind of bomb for this dive angle due to fragment, but it is for test ony).

 

9000ft QNH / 6000ft AGL

Sd QNH

No wind

 

5 attacks and 5 bombs on target or very close to.

 

Should be interesting to know if real F/A-18 pilots use the AUTO mode in level flight.

[ShalashakaDS]

Could you do some testing with the other models? We kinda stabilished that the 83 is the most accurate one, I can score hits with it all day long, but it's a different story with the 84 with the same procedures.

Edited August 3, 2019 by ShalashakaDS

[vctpil]

Will do that tomorrow with the mk84 if my standby is not activated.

[Shiny]

I did some testing here between mk82 and mk83 and found the mk82 and its LG variant to be very inaccurate in auto release: https://forums.eagle.ru/showthread.php?t=246829

[vctpil]

Could you do some testing with the other models? We kinda stabilished that the 83 is the most accurate one, I can score hits with it all day long, but it's a different story with the 84 with the same procedures.

 

Same conditions with the OB and mk84. Not so bad, sometimes a little bit short.

[ShalashakaDS]

Thank you for taking the time to reply, if im not abusing your good will, could you do one more test with the 84 with a level or very shallow dive release? I think we also stabilished that a steep dive helps mitigate the problem. Here are some more screens and tracks.

Same mission i posted before, two releases of the mk-84, one in a very steep dive and the other in a shallow dive.

 

mk-84 steep dive

 

mk-84test1SteepDive.trk

 

 

mk-84 shallow dive

 

mk-84test1ShallowDive.trk

 

In the fisrt test, with a steep dive and a release at 12000ft it lands much closer to the center of the target, still a little short. In the second run, all the same settings, the same mission and a 5 degrees dive with the release at 8000 ft it falls way shorter. If that is the intended behavior im fine with that, HOWEVER, in the very same mission i can repeatedly score hits in the center of the X with the mk-83 from steep dives AND perfectly level releases, from anywhere from 5000ft to 20000ft, i cant imagine why it should be diferent from bomb to bomb.

Edited August 4, 2019 by ShalashakaDS

[vctpil]

No problem ShalashakaDS, here's my tests with mk84 :

 

Openbeta

AUTO mode

No wind sd QNH

27000ft for roll-in

 

45° dive : a little bit short (right outside the circle)

 

Level flight : see the screenshot!

Test AUTO mk84 45deg.trk

Test AUTO mk84 Level.trk

[Emmy]

I think it was RedKite who did a loft-bombing tutorial video and he stated that Mk-82s consistently fell short, Mk-84s consistently went long and Mk-83s were bang on.

 

Yeah, different delivery method, but same outcome with each type of weapon.

[schurem]

Does the map matter as well? AUTO bombing LGB's go way long on the Gulf map. But I has some fairly good results on the caucasus map...