Advanced Ballistics (WIP)

[DGeorge85 10]

I'm still not getting any wind drift, and it has me wondering if any of AB is working for me because my profiles are off too. Is the newest update working fine for everyone else?

Edit: Started with disabling the .dll and it's working now. Atleast that narrows it down.

Edited December 21, 2014 by DGeorge85

[ruthberg 7]

Are you using the latest DLL file?

[DGeorge85 10]

Are you using the latest DLL file?

Yessir. The only thing I've done that differs from how it's packed is that the .dll is in the root folder instead of the "dll" folder. Also I've shortened the folder name and combined the AB, Kestrel and ATrag pbo's all in the same "addons" folder since my Steam launch parameters were getting too long, but I've been doing that for awhile. Unless the recent update calls for a specific directory I don't know what it could be.

[alexrandom 10]

Pardon my Google-Translator.

Your mod has a problem with the devaluation. Or cutting tools. Using .408 I need to twist rifling step right up to 6 inches. And it is necessary to have a table with 13 inches. What is the reason?

Arma 3. CheyTac M320 LRR .408 (10.36x54mm)

"Data on the projectile"

Length bullet: 2.126

Bullet diameter: 0.408

Bullet weight, Grain: 416.0

Ballistic coefficient: 0.97

Drag function: G1

Velocity, m / s: 880, 894, 910, 918, 940, 963.

Temperature, ÌŠC: -18, 4, 21, 26, 38, 54.

Factor sensitivity to temperature: 2.0

"The atmosphere zeroing"

Temperature: 21.1

Pressure hPa: 1013

Humidity: 58%

"Offset zeroing" (click)

Vertical: 0.0

Horizontal: -0.1

"Data on the gun"

Zeroing distance: 500 m

The height of the sight: 5.0 cm

Vertical click MOA (Mil): 1.0

Horizontal click MOA (Mil): 1.0

Net sight: MilDot (USMS)

Minimum multiplicity: x10

Multiplicity calibration grid: x84

The maximum multiplicity: x84

Right step rifling of the barrel: 6.0 (need 13)

___________

example:

Distance: 1431 m

Elevation angle: -4.0

Wind speed: 2.5 m / s

Wind direction: 255

Direction to the target: 005

Temperature ÌŠC: 24.4

Pressure hPa: 982

Humidity: 57%

__________

The result at the right step marked slot trunk = 6.0 and windage -0.1:

Vertical: MOA = 30.22, MRAD = 8.79, cm = 1257.8, click = 8.8

Horizontal: MOA = -3.44, MRAD = -1.0, cm = 143.1, click = -1.0

Hit 3-5 / 5

__________

The result at the right step marked slot barrel = 13 without amendment:

Vertical: MOA = 30.22, MRAD = 8.79, cm = 1257.8, click = 8.8

Horizontal: MOA = -2.34, MRAD = -0.68, cm = 97.4, click = -0.7

Slip the right.

That's what brings me to your computer.

Edited December 22, 2014 by AlexRandom

[ruthberg 7]

I hope I've understood you correctly.

The ATragMX is not yet able to calculate spin- and coriolis drift.

But you can use the following ballistic tables to correct for it:

- https://www.scribd.com/doc/242184872/408-CheyTac-1013-25mb?secret_password=JY541y5vSyLwRwc7C2c3

- https://www.dropbox.com/s/0trrak1je8q27hm/.408%20CT.xls

[alexrandom 10]

I watched these tables. I use my computer. On Android. Accurate enough. StrelokPro name.

This table is written: Rifling Twist 13 in, when I enter 13 in. - The bullets go right. Driven to 6 in - hit the target.

Edited December 22, 2014 by AlexRandom

[ruthberg 7]

Coriolis drift also pushes your bullet to the right (on Altis/Stratis).

But I will look at the spin drift code again. Maybe I can find a bug.

[Sanya 97]

Can you make advanced ballistic for shells rpg-42? Link at imades PG-27 similar ATG-32, ATG-32 & TBG-32

[alexrandom 10]

Added Coriolis effect - on the horizon is a better place to hit the target. But the vertical steel bullets to go a little higher. Judging by Google maps, shooting position on the map Stratis be in latitude 39.52. If I understand where to get the data. ))) And increments marked slot trunk all remain unchanged, even with the Coriolis.

I am interested in diverting bullet vertically due to crosswinds. It works? If yes then where you can see the value?

Edited December 22, 2014 by AlexRandom

[ruthberg 7]

The Magnus effect is not part of the simulation.

[alexrandom 10]

Please. So I set up vertically. You have to think what to do with the horizon ...

Edited December 22, 2014 by AlexRandom

[ruthberg 7]

I want to help, but I don't know how.

The muzzle velocity varies with temperature. The muzzle velocity of the .408 CT at 27°C is around 920 m/s.

The barometric pressure varies with height. The average air pressure, the bullet travels through, can therefore vary, when you shoot upwards or downwards.

[alexrandom 10]

I understand. I have a ballistic computer it takes into account all. I will later throw off screenshots with the translation.

---------- Post added at 22:44 ---------- Previous post was at 21:36 ----------

http://file.sampo.ru/ngg99s/

Here screenshots. Just for you to understand why I'm asking. On me the tests can be put. ))))

[TiborasaurusRex 11]

@AlexRandom: With all due respect, honestly i don't really understand what you're talking about. No offense, could you please tell us your problem in proper English? What's exactly your issue? Bullet drop doesn't match your solver? Windage error? No Spin drift & Coriolis? or what?

have you used the correct Ballistics Coefficient?

have you input the correct Ammo & Gun parameters?

have you taken "Muzzle Velocity variation due to powder temp" into account?

have you measured the atmospheric condition right (air pressure, temp, humidity)?

have you considered strong wind which can affect the trajectory?

[ruthberg 7]

Strelok Pro seems to be working perfectly fine:

But for some reason does the spin drift in-game not match with the output of his solver.

I will test this thoroughly in the next few days.

[alexrandom 10]

@AlexRandom: With all due respect, honestly i don't really understand what you're talking about. No offense, could you please tell us your problem in proper English? What's exactly your issue? Bullet drop doesn't match your solver? Windage error? No Spin drift & Coriolis? or what?

have you used the correct Ballistics Coefficient?

have you input the correct Ammo & Gun parameters?

have you taken "Muzzle Velocity variation due to powder temp" into account?

have you measured the atmospheric condition right (air pressure, temp, humidity)?

have you considered strong wind which can affect the trajectory?

Excuse Me. Do not speak English. Google translator translates.

1. Bullet drop does not match your solver?

Bullet drop in temperature does not coincide with the tabulated. My computer has issued droop rate of temperature 1.1 by zeroing. 2 km, as you can see, I hit the target.

2. Windage error?

Yes I Am. As noted Ruthberg, error is possible.

3. No Spin drift & Coriolis?

When there is no wind and it works. I can not fully answer yet.

4. have you used the correct Ballistics Coefficient? Taken from the table.

5. have you input the correct Ammo & Gun parameters? Taken from the table.

6. have you taken "Muzzle Velocity variation due to powder temp" into account? Detail. Where to look.

7. have you measured the atmospheric condition right (air pressure, temp, humidity)? Every time I conduct measurement at Kestrel.

8. have you considered strong wind which can affect the trajectory? Yes I Am. My computer is calculates. Even more. I calculate degrees from which the wind is blowing and what degrees he blows on the objective.

---------- Post added at 12:07 ---------- Previous post was at 11:42 ----------

Mr. Ruthberg. In your fashion using drag function? Indeed, in the LRR Must be used bullets drag function G-7. Or am I mistaken?

Edited December 23, 2014 by AlexRandom

[ruthberg 7]

The .408 CT is simulated using a G1 BC of 0.97. And the muzzle velocities are:

[table=width: 500, class: grid]

[tr]

[td]Temperature in °C[/td]

[td]Muzzle velocity in m/s[/td]

[/tr]

[tr]

[td]-15[/td]

[td]883[/td]

[/tr]

[tr]

[td]-5[/td]

[td]887[/td]

[/tr]

[tr]

[td]5[/td]

[td]893[/td]

[/tr]

[tr]

[td]10[/td]

[td]897[/td]

[/tr]

[tr]

[td]15[/td]

[td]902[/td]

[/tr]

[tr]

[td]20[/td]

[td]908[/td]

[/tr]

[tr]

[td]25[/td]

[td]916[/td]

[/tr]

[tr]

[td]30[/td]

[td]925[/td]

[/tr]

[tr]

[td]35[/td]

[td]936[/td]

[/tr]

[/table]

[alexrandom 10]

Unfortunately, you probably saw that I zeroing temperature differences. Although I get a vertical well.

927m/s=27C

899m/s=4C

In the video, with a hit for 2 kilometers were just such settings.

Strelok Pro counted based on the introduced amendments to the current velocity. You can also and ballistic coefficient do. But he decided not to touch.

Moreover, I zeroed weapon on the map Stratis. In VR, I went for a test with no wind and the angle of the target.

Edited December 23, 2014 by AlexRandom

[ruthberg 7]

Unless you altered the default zero setting you should use 15 °C (59 °F), 1013.25 hPa and 50% here:

Edited December 23, 2014 by Ruthberg
Added degree Celsius

[alexrandom 10]

Please. Do not write in Fahrenheit. It is unusual for me. I use meters and Celsius.

I and so are the settings. Is that the humidity adjusted. But this is not the most important factor. Right?

Let me try again to drive your readings speed and posted a video. Let's see what happens.

Here, as promised.

http://www.youtube.com/watch?v=CD4ryNLraQA&feature=youtu.be

The first video: This is your settings.

http://www.youtube.com/watch?v=zQSvlS3zK_k&feature=youtu.be

The second video: My settings.

100-500-1000 m similar results. But at 2000m, difference in clicks (2 down and 1 left)

I tried to shoot from 20.4 at the head, but the bullet passed above.

Adjusted 20.2, when aiming the body, fixed the bullet will strike weapon target (flash) at the level of the crosshairs.

Edited December 23, 2014 by AlexRandom

[ruthberg 7]

Is that the humidity adjusted. But this is not the most important factor. Right?

Yes, humidity is negligible. But the ambient air temperature at which you zeroed your rifle is very important.

You can modify your scope zero with CTRL + SHIFT + UP/DOWN. Try to zero your weapon at 100 m and go from there.

[alexrandom 10]

I do not quite understand what you mean. What is green Mil?

Edited December 23, 2014 by AlexRandom

[alexrandom 10]

GM6 - does not work

SVD - works

M14 EBR-RI - works

All tests VA, with no wind, and the target angle.

Edited December 24, 2014 by AlexRandom

[ruthberg 7]

The green MIL setting is your zero offset.

[alexrandom 10]

-4 = 100

5 = 1000?

I had to take the right by 0.1 Mil to hit the target.

Edited December 24, 2014 by AlexRandom