[Coding] Balistics/zeroing [WIP]

[zangoo]

ok that makes more sence. what should the max range of the bullet be, i am thinking that a life time of 3.5sec should be good, it would allow the bullet to travel 1371m and with a max view distance of 1000m that would be more then enough. also does anyone else know of diffrent external ballistics calculators that can show a range past 1500 yards and are free?

[zangoo]

did more tests

here is what i was using

test one
--------
mass=0.004
drag=0.07
range=1371m
flight time=3sec

test two
--------
mass=0.004
drag=0.08156
range=1371m
flight time=7.3sec

i am trying to get a flight time of 3.6sec. has anyone found any infomation on what the drag value means?

[Wyspa]

Thanks, dont have access to those forums so to us it looks like you are not doing anything.

What would be the main uses of the wz96/04, 05 and 06 rifles? Is one a scoped version, another ironsights and the third a carbine or are the second two both carbines?

Well sorry for late respond... anyway
normal beryl (04) will have 3 versions with scope, grenade luncher (GPBO or Pallad... we're thinking about both because 2nd in now used but 1st is newest and probably will be used in near future) and simple iron sight/ Beryl commando (06) will be used with eotech and mini beryl (05) will use eotech or iron sight... maybe both... I will give you their specification soon (my friend have to check it from "users instruction" from his beryl 04)
all of the versions are assault rifles but commando and mini are shorter (mini look almost like AKSU)
EDIT:
Some more Info:
All versions of beryl:
Ammo (caliber/type): 5,56 x 45 mm/ SS109 and M193 (5,56 x 45 mm NATO)
Rate of Fire: 700 rounds/min

Normal Beryl (04)
Vo:920 m/s
Eo:1693 J
Range: 600 m

Mini Beryl (05):
Vo: 770 m/s
Eo: 1186 J
Range: 400 m

Beryl Commando (06)
No info...

Here you have photo with all 3 of them:
from top:
Mini Beryl
Beryl Commando
Normal Beryl
http://www.militech.sownet.pl/plxxi/_plxxi_62.jpg
I still have to find signs height...

[Celica`]

As for the Dutch Forces mod;

Marksman; H&K 417 (500)
Sniper; AWM (600) (Placeholder = L115A10
Standard Rifle; C7A1 (50 - 300) (ELCAN / Ironsight)
Auto Rifleman; FN Minimi (250)
Special Forces; P90 (50)
Standard Pistol; Glock 17 (25)
Grenadier; C7A1 + AG36 Underbarrel GL.

Hope that will help you more.

[Mosquill]

Jonny, have you tested the new 300m svd? It looks like you've made a mistake in your calculations. It's zeroed exactly at 300m only when m=0.0242(not 0.242). But I got a feeling that it may be just me again.

[Mosquill]

EDIT:
I could still use a whole lot of BCs from you, too.

Well, I wanted to test SVD first and compare it's ballistics with real life data. But ok, here you go:
(h - sights height)

L86 - M855(5.56x45 NATO), BC:0.304, V=970m/s, m=4g, h=8cm

M14 - M118(7.62x51 NATO), BC:0.468, v=865m/s, m=11.2, h=5.1
or M118LR, BC:0.49, v=874m/s, m=11.3

M24 - M118, BC:0.468, v=853m/s, m=11.2, h=4.2
or M118LR, BC:0.49, v=862m/s, m=11.3

M40A3 - M118, BC:0.468, v=777m/s, m=11.2, h=5.7
or M118LR, BC:0.49, v=786m/s, m=11.3

M118LR is the new bullet with better ballistic performance then M118, US is currently in transition to that bullet, but they still use M118(afaik). So I'm not sure wich bullets PR should use.

QBU-88 - ???(5.8x42), BC:0.309(BC calculator), v=895m/s, m=4.1g, h=8.3
QBZ-95 - ???(5.8x42), BC:0.309(BC calculator), v=930m/s, m=4.1g, h(optics)=13.3, h(irons)=9.6

SV-98 uses some kind of a new russian 7N14(7.62x54R) bullet, russians are the only ones who use it, they don't export it anywhere. And I couldn't find any data on that bullet (not even mass). I guess russians just don't want to share info on their new design.

I don't know how the hell PLA and MEC got SV-98, but since they did, I guess they would use it with an old 7N1 SVD bullet.

SV-98(non-russian)(7N1) - BC:0.43, v=830m/s, m=9.8g, h=???



btw, I still can't make that SVD work.

[Masaq]

Okay, I'm out tonight but I'll try and spend time tomorrow and monday coming up with a really basic to use as a shooting range.

And I mean basic - it'll be flat and boring mostly! M.

[zangoo]

for the values you appear to be using k < 0.002743
k will be the product of the drag modifier, if you are actually managing to change it, and 0.064, the constant in the engine.

Try using a value of k = 0.00244
or a value for the modifier in the tweak files of 0.0375

ok so how do i use k to find what i need to set the drag to? also if i were to set the drag to 0.0375 the bullet would go way faster then it should the value should be around 0.07-0.076.


also do we only need to calculate the drag for each bullet and not each gun or does the velocity effect drag so the speed would be off?


edit :d id some more test and made the demo play at 1%, it took the bullet 353sec to travel 1371m, so a ingame travel time of about 3.53sec +/- about 0.02sec for pressing the button and what not.

the specs were

bullet weight:0.004
drag:0.076
muzzle speed:940m/sec
gravity:0.00

[zangoo]

hey jonny how are you going to calculate damage? also have you found

ObjectTemplate.damage 0
ObjectTemplate.minDamage 0
ObjectTemplate.DistToStartLoseDamage 0
ObjectTemplate.DistToMinDamage 0

for each weapon?

[KP]

SV-98 uses some kind of a new russian 7N14(7.62x54R) bullet, russians are the only ones who use it, they don't export it anywhere. And I couldn't find any data on that bullet (not even mass). I guess russians just don't want to share info on their new design.

I don't know how the hell PLA and MEC got SV-98, but since they did, I guess they would use it with an old 7N1 SVD bullet.

SV-98(non-russian)(7N1) - BC:0.43, v=830m/s, m=9.8g, h=???

SV-98 is also chambered in .308 Winchester (which, I believe, is the same as 7.62 NATO, as used by the L96A1). I think that's the export version, and that's what should be used for the MEC/China.

Also, according to Wikipedia on the 7.62x54 round, the 7N14 has a "151 grain (9.7 g) projectile which travels at the same 2723 ft/s (850 m/s), but it has a lead core and is supposed to be the more accurate of the two."

Sniper's Paradise on the 7.62x54 7N14.

[Mosquill]

Ok Jonny, that last SVD is not zeroed at 300m for me (it's 345m). I've checked everything, and I don't know what is the reason.

SV-98 is also chambered in .308 Winchester (which, I believe, is the same as 7.62 NATO, as used by the L96A1). I think that's the export version, and that's what should be used for the MEC/China.

Also, according to Wikipedia on the 7.62x54 round, the 7N14 has a "151 grain (9.7 g) projectile which travels at the same 2723 ft/s (850 m/s), but it has a lead core and is supposed to be the more accurate of the two."

Thanks KP.

But why would MEC/PLA use NATO rounds? That doesn't make much sense to me.


edit: Jonny here's the bullet's distance from LOS from my tests:
100m: 15cm
150m: 20cm
175m: 21cm
200m: 20cm
250m: 17cm
275m: 15cm
300m: 10cm
333m: 5cm
340m: 2cm
345m: 0cm

Maybe this will help.

[KP]

Well, if the Ruskies won't share their 7.62 sniper rounds? I just assumed that the .308 was the export version. Otherwise, use the SVD round at the same velocity as the SV-98 one.

By the way: the MEC G3 uses a NATO round.

[Mosquill]

been playing with the formulas on the table with BCs in, try:
v = 830
h = 0.07
m = 0.0979
θ = 0.159
g = 9.8
drag = 1
Hadn't removed one of the mass terms, so it was having an effect after adding the BC in. Should be fixed now, re-measured k and updated the table.

Done, check your PM box.


Can't find enaugh info on L115A1 btw.

[KP]

What is needed on the L115? I've got some info on various weapons bookmarked...