Gun reticle jumping

[mr_mojo97]

A-10C gun reticle every now and then bounces up and down as I'm about to rain fire down on SPI so I can't get a line of fire down exactly where I want it.

Any ideas?

[Mugenjin]

Do you use PAC? Hint hint check the manual ^^

[MTFDarkEagle]

What's the elevation?

[BlueRidgeDx]

Reticle jumping occurs when using AUTO (DTS) elevation in hilly, mountainous terrain.

 

There are two good ways to stop it. The first is to setup variable target elevation in the IFFCC menu. Variable Target Elevation will enable you to engage targets for which there is elevation uncertainty. It enables dual pippers that look like the Combat Mix API/HEI dual pippers, but behave differently. The pippers will be vertically displaced from each other, with the upper pipper indicating the CCIP ballistic solution for the higher target, and the lower pipper for the lower target.

 

The second, and best way, is to use HOT elevation instead of AUTO. This will fix the. CCIP Guns Solution to a single altitude, instead of dynamically estimating and displaying reticle depression using the DTSAS.

 

The manual describes how to setup each one.

[Corrigan]

Great info, thanks!

[mr_mojo97]

Nice one Blueridge that is exactly it. Not tried them yet, but will do later. As soon as I read the maountainous/ hilly terrain description I knew that was it.

Cheers everyone else for your comments

[ralfidude]

Hey if you find it, please post where it is in the manual, I get this from time to time too in hilly areas, it would be cool to fix it, plus its something new to learn and/or set up during manual start up!! Hehe.

 

 

Quick question though, with one of those options selected, if you were to be on plain level ground, will the reticule behave correctly as we are used to it now?

[mr_mojo97]

Ralfidude - look at page 523 Gun Use first paragraph for this info. Also the rest of the gun pages are useful too and it's only 7 pages

[jazjar]

No. The manual doesn't once mention HOT elevation, or the variable target elevation stuff. It is not on 523, or any of the HUD pages, or on the UFC page either. I have stumbled upon HOT elevation before, but have had no clue as to how it works, and have never encountered variable target elevation either. Please explain the further BlueRidgeDx

Edited June 19, 2012 by jazjar

[jazjar]

"If DTS is not selected, the elevation will be based on the steerpoint. If based on steerpoint and the steerpoint is at a higher elevation than where the CCIP gun sight is pointed, you will get a CCIP INVALID error." Thats what the manual says, never mentions HOT or Variable target elevation.

[BlueRidgeDx]

Sorry; I assumed the manual covered this material.

 

First of all, in order to use Variable Target Elevation, the AUTO elevation mode must be turned off (it's on by default). To turn it off, press the UFC DATA button, and note the flashing value in the center of the HUD. Use the DATA rocker to adjust the value to the desired elevation. Press the UFC ENTER button to accept the value. You are now in HOT elevation mode.

 

You could stop here, and the pipper would no longer bounce around when strafing in hilly terrain. But if you don't know the exact elevation of the target, you might want to use the Variable Target Elevation function.

 

To use it, place the IFFCC switch to TEST, and and use the UFC keys to navigate to the Weapons menu. At the bottom you will see a line for VAR TGT ELEV. Enter a value that represents the elevation uncertainty - if the target is at 2000ft +/- 100ft, you would enter 100. This means that IFFCC will provide two CCIP solutions - one for a target at 1900ft, and another for a target at 2100ft.

Edited June 19, 2012 by BlueRidgeDx

[luza]

afaik you could also make a markpoint while using the laser with your TGP as accurate altitude information

[jazjar]

So in HOT elevation mode, the elevation is the steerpoint, correct, and to select var target el, you also use the data and select switches, correct?

[BlueRidgeDx]

After initially pressing the DATA rocker, the elevation shown flashing in the HUD defaults to current steerpoint elevation, but it can be changed to whatever value you want by pushing the DATA rocker in the desired directon. After setting the desired value, pressing ENTER will store the value as the HOT elevation.

Edited June 19, 2012 by BlueRidgeDx

[jazjar]

Right, so that's HOT, and variable target elevation is selected by a similar method, pressing the DATA rocker?

[BlueRidgeDx]

No, see the post above where I explained the steps in detail. VAR TGT ELEV is set in the IFFCC Weapons menu, which is accessible via the HUD and UFC when the IFFCC switch is in TEST.

[jazjar]

Roger will check thank you

[SmokeyTheLung]

Right, so that's HOT, and variable target elevation is selected by a similar method, pressing the DATA rocker?

 

 

To use it, place the IFFCC switch to TEST, and and use the UFC keys to navigate to the Weapons menu. At the bottom you will see a line for VAR TGT ELEV. Enter a value that represents the elevation uncertainty - if the target is at 2000ft +/- 100ft, you would enter 100. This means that IFFCC will provide two CCIP solutions - one for a target at 1900ft, and another for a target at 2100ft.

 

In case you missed that

 

Edit...what blueridge said :)

Edited June 19, 2012 by SmokeyTheLung