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Wind correcting Dumb Bomb Delivery


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Hi All,

 

I have had a mixed bag of results with the use of dumb bombs in CCIP and CCRP, generally speaking, flying skills apart, the issue is related to wind (not diet related, but atmospheric).

 

I have just gone through the procedure of entering wind correction into the CDU to correct for this, and the results speak for themselves.

 

Below is the walkthrough of the procedure I use, I hope it is of some use to you fellow sim pilots, and hope I am not teaching you to suck eggs!

 

 

Sorry for all the pics!!!

 

 

CCRP bombing, paired release @ 6000 ft 210kts. Wind 270 degrees 15m/s

 

 

 

 

1.jpg

 

As shown above, the bombs missed their mark, and no damage done to the target. This was a stable release, wind accounting for the miss.

 

Procedure for correction:

 

1) On the CDU panel, press the SYS button, then press the LASTE button:

 

2.jpg

 

 

2) Click the wind OSB to enter the wind correction page:

 

2a.jpg

 

3) This is where you can enter the wind correction data. Start off by entering the altitude of the first layer of wind. I start with ground level. To do this, enter 00 in the scratch pad, then click the first empty line on the left to enter this altitude.

 

3.jpg

 

4) Repeat the process for other wind layers if known. What I did here was repeat the wind speed and direction data for my altitude, so the adjustment calculation took place. In this case I entered 06 (for 6000ft) and placed that altitude in the line beneath the first:

 

4.jpg

 

 

5.jpg

 

 

6) When you have enetered all the layers you desire, press the WndEdit button.

 

In this step you enter the wind speed and direction.

 

How you get this data is up to you :) You can get it form the mission editor, Air traffic, even the JTAC gives the wind vector for you.

 

To enter the data you have to enter 5 digits. The first 3 digits is the direction of the wind, so 000 = north and so on.

 

In this case, 270 was the wind direction.

 

The 4th and 5th digits is the wind speed in m/s

 

So wind speed 15 ms at 270 degrees, we enter 27015.

 

If wind was at 10 degrees and 7 m/s, you should end 01007

 

Once entered, hit the OSB for the layer you want to add this data. Repeat this for all layers.

 

7.jpg

 

 

7) Next step is to add the temperature data for each layer. Again get this from the ME/brief. You also have the current temperature shown in the CDU on the top right. I just used this temperature accross all layers. 18 degrees here.

 

8.jpg

 

8) Once done, hit the WIndTemp OSB to go back a step and store the data:

 

9.jpg

 

9) Get yourself lined up.... and bombs away!!!!

 

10.jpg

 

 

 

"Good bombs, good bombs"

 

11.jpg

 

 

 

BDA flyby:

 

12.jpg

 

 

 

As you can see from the result it seems to do the job nicely!!! The smoke also blows along the correction line...

 

 

I would like to say there is no camera trickery here, and I hope the above isn't just a placebo, and my first run was just bad. But I tried this out a few times, and it appears to do the job. Let me know how you get on!!!

 

 

Also, thanks ED for making this sim so involved, things like this are great!

 

 

Happy bombing all!


Edited by Dynamo
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Awesome.. just awesome. Great job!

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So am I to guess that the altitude dosent matter for wind? If its 270 for 5 thats what it is for all altitudes? And can you enter up to three altitudes? Awesome post also!

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Weaponz: have another read through ;) You can add several wind layers.

 

 

Thats what I figured but I dont remember the game itself breaking down wind for differnet altitudes? I thought it was one set wind.

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Thats what I figured but I dont remember the game itself breaking down wind for differnet altitudes? I thought it was one set wind.

 

3 Separately configurable wind settings in the ME based on varying Altitudes.

 

Edit: Sniped :)

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cool so roughly 0, 6000, 26000 feet. Cool cant wait to give it a shot

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Hi guys, thanks for the feedback, warmer than expected.

 

According to the CDU documentation, you can add 7 wind layers, but as mentioned above, there are only 3 layers to edit in the mission editor.

 

I was expecting the correction to make a difference, I was quite suprised just how much. The Mk82 scraping down the side of the vehicle before going off was glorious to see.

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we dont need JDAMs anymore !!!

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I was under the impression that manual wind correction was only for correcting flaws in the automatic system and not standard practice. The tone of this thread suggests I have been missing something (mostly tanks;)). I assumed that my repeated failure to hit anything from that height with a slick was the slicks fault not mine.

 

Can someone confirm that this should be standard procedure or just a "2%er". Dynamos results are impressive! I'll definitely give it a try.

 

Cheers.

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Great find, and an excellent write-up. Thanks for taking the time to do it so thoroughly!

 

One tiny thing that threw me for a moment, is that you say:

 

The 4th and 5th digits is the wind speed in m/s

 

So wind speed 5 ms at 270 degrees, we enter 27005.

 

But your initial discussion of the wind you said CCRP bombing, paired release @ 6000 ft 210kts. Wind 270 degrees 15m/s. I spent a little bit of time trying to work out why you were only entering 5 m/s before I looked at the next screenshots and decided it must've just been a typo.

 

Might be worth editing the post in case it confuses other people.

 

ED - any chance this information could be automatically loaded from the data cartridge, or do the real pilots have to enter it once in the pit? I guess in real life the winds might be variable enough that programming the expected winds at the target location prior to take-off would be a waste of time?

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Hi All,

 

 

The 4th and 5th digits is the wind speed in m/s

 

So wind speed 5 ms at 270 degrees, we enter 27005.

 

Entering m/s in a U.S. made a10 surely NOT !! Can someone at ED confirm, I've been entering wind speed in knots (i.e. 5m/s = 10 knots).

 

Also I believe this procedure is used for high/med altitude bombing as the HUD PBIL & bombing reticule SHOULD already compensate for actual wind being experienced by the aircraft at its current altitude. i.e. The Projected Bomb Impact Line follows the flight path of the aircraft. I doubt many are dropping MK82LOs from 2000m/7000ft, more like 4000ft or less (depending on dive angle).

 

After bomb release, theoretically if the bomb maintains the same speed as the aircraft and the wind from release point to ground level is reasonably constant, it should impact on the PBIL.

 

The exception is when you are using retarded/high drag weapons as they will be affected more by the wind as they decelerate.

 

A caveat to the above. If mission designers are putting considerably different wind direction & speeds for ground level and 2000m then I can see why this procedure would help, you will however have to extrapolate the winds. A word of caution here though .....

 

With the 3 winds in the DCS ME set at 0 , 2000m and 8000m, are amsl. I ran a test and they do not run linearly between the set altitudes.

 

e.g ME SeaLvl=090/5, 2000m=180/20, 8000m=270/80 (speed is m/sec)

 

I recorded the following off the EGI (speed in knots. i.e. m/sec x2 = kts)

60 ft = 084/7

1000 = 084/10

3500 = 156/19

7000 = 180/40

15000 = 202/35

23500 = 265/78

26000 = 265/78

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No Joy here. I get the same results as when I first tried this method. Nice tight grouping, but the bombs just land amongst the craters of the unadjusted drops.

 

Am I missing something here? Activation Button? Page Selector? I have noticed that my entries do not affect the CDU steerpoint wind data. Is this right? Your method appears to match the manual and I just can't figure out what I am doing wrong.

 

I have tried bombing with the page selector to "other" and LASTE wind page displayed, as well as with "steerpoint" selected with standard steerpoint, all with no effect. All my runs were CCRP 9000-12000 feet. Wind 40kts (yeah, I did some bad maths in the editor and set it too high).

 

You noted that maybe you just got lucky. Has anyone else got this to work?

 

Yours in simming,

BiPod

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Very good guide, thanks.

 

 

How you get this data is up to you :) You can get it form the mission editor, Air traffic, even the JTAC gives the wind vector for you.

 

- What, if I use the dynamic weather function? There, I don't set specific wind data, only pressure systems.

 

- ATC, IIRC, tell you only wind speed and direction at the airbase. What, if I don't have JTAC in the target area?

 

How you see, sometimes you don't get wind data. What's in such situations? Is there a work around?

 

 

kind regards,

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But your initial discussion of the wind you said CCRP bombing, paired release @ 6000 ft 210kts. Wind 270 degrees 15m/s. I spent a little bit of time trying to work out why you were only entering 5 m/s before I looked at the next screenshots and decided it must've just been a typo.

 

Might be worth editing the post in case it confuses other people.

 

Well spotted, I read through it loads of times to make sure I didnt miss anything, but this slipt past QA! In the screen shots you can see I entered the correct value of 15 ms, but I have updated the text to relate to that, thanks for the find.

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You noted that maybe you just got lucky. Has anyone else got this to work?

 

 

Perhaps I did, but it wasn't just a one off. Will be interested in hearing from others on this, as I said, I hope this isnt just wishful thinking.

 

 

Druid: windspeed in knots or m/s is a very good point. More testing later.

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