Naval AntiAir Artillery Mod

[Silver_Dragon]

That is my First A-10C Mod. I see some heavy naval guns don´t engage missile and air planes, before, I start to investigate the bazaar forms.

 

I start centrer on Molniya (Tarantul III) ship and the frontal AK-176 76mm cannon. On a normal A-10C mission, the molniya only engage air target by AK-630 CIWS cannon, but the AK-176 has usefulness. The AK-176 can engage aircrafts and ASuW missiles at 15,700 m range and 11,000 m ceiling

 

AK-176 gun reference

http://www.navweaps.com/Weapons/WNRussian_3-60_ak176.htm

 

My investigation show some interesting files on C:\Program Files\Eagle Dynamics\DCS A-10C\Scripts\Database\scripts

- cannon

- automaticgun

- ship_sensor

 

First, I discover all AAA guns has a special type definition on autocanon:

WS_phalanx = {} -- Mark 15 CIWS Phalanx Block 1

WS_phalanx.maxRight = -1.9

WS_phalanx.maxLeft = 1.9

WS_phalanx.maxBottom = math.rad(-25) -- jane's NWS

WS_phalanx.maxTop = math.rad(85) -- jane's NWS

WS_phalanx.omegaY = math.rad(126) -- jane's NWS

WS_phalanx.omegaZ = math.rad(92) -- jane's NWS

WS_phalanx.pidY = { p = 30, i = 0.3, d = 5, inn = 6};

WS_phalanx.pidZ = { p = 30, i = 0.3, d = 5, inn = 6};

WS_phalanx.reference_angle_Z = 0

WS_phalanx.LN = {}

WS_phalanx.LN[1] = {}

WS_phalanx.LN[1].type = 3

WS_phalanx.LN[1].distanceMin = 0

WS_phalanx.LN[1].distanceMax = 2000

WS_phalanx.LN[1].max_trg_alt = 1500

WS_phalanx.LN[1].reactionTime = 2

WS_phalanx.LN[1].sound = { cycle_shot = "Weapons/Automatic/Phalanx", end_burst = "Weapons/Automatic/Phalanx_End" };

WS_phalanx.LN[1].sensor = {}

set_recursive_metatable(WS_phalanx.LN[1].sensor, WSN_5)

WS_phalanx.LN[1].PL = {}

WS_phalanx.LN[1].PL[1] = {}

WS_phalanx.LN[1].PL[1].ammo_capacity = 1550;

WS_phalanx.LN[1].PL[1].shell_name = {"M61_20_HE", "M61_20_AP"};

WS_phalanx.LN[1].PL[1].shot_delay = 60/4500 -- 3000rpm for Block 0, 4500rpm for Block 1

WS_phalanx.LN[1].PL[1].reload_time = 1000000; -- never during the mission (ship autogun)

WS_phalanx.LN[1].BR = { {pos = {3.478, 0, 0} }, }

 

The .type = 3 enable AAA capability

 

that is the AK-176 data form

WS_ship_AK176 = {} -- 76mm artillery system

WS_ship_AK176.maxRight = -2.56893

WS_ship_AK176.maxLeft = 2.56893

WS_ship_AK176.maxBottom = -0.174533

WS_ship_AK176.maxTop = 1.39626

WS_ship_AK176.omegaY = math.rad(35);

WS_ship_AK176.omegaZ = math.rad(30);

WS_ship_AK176.reference_angle_Y = 0

WS_ship_AK176.reference_angle_Z = 0

WS_ship_AK176.LN = {}

WS_ship_AK176.LN[1] = {}

WS_ship_AK176.LN[1].type = 6

WS_ship_AK176.LN[1].distanceMin = 50

WS_ship_AK176.LN[1].max_trg_alt = 10

WS_ship_AK176.LN[1].reactionTime = 15

WS_ship_AK176.LN[1].sound = { single_shot = "Weapons/Cannon/73mmGun", }

WS_ship_AK176.LN[1].sensor = {}

set_recursive_metatable(WS_ship_AK176.LN[1].sensor, WSN_7)

WS_ship_AK176.LN[1].PL = {}

WS_ship_AK176.LN[1].PL[1] = {}

WS_ship_AK176.LN[1].PL[1].ammo_capacity = 180

WS_ship_AK176.LN[1].PL[1].shell_name = {"AK176_76"};

WS_ship_AK176.LN[1].PL[1].shot_delay = 0.5

WS_ship_AK176.LN[1].BR = { {pos = {4.3, 0, 0} } }

 

I modified the subsequence data:

WS_ship_AK176.LN[1].type = 3

WS_ship_AK176.LN[1].max_trg_alt = 11000

WS_ship_AK176.LN[1].distanceMax = 15700

 

I go to the Molniya form and search for AK-176 data and found them on:

C:\Program Files\Eagle Dynamics\DCS A-10C\Scripts\Database\navy\red

 

new data on red, missing on the original, I link the AK-176 with the Vymplet Fire control radar

GT.WS[inc_ws()] = {}

GT.WS[ws].area = "TOWER_F";

set_recursive_metatable(GT.WS[ws], WS_ship_AK176)

GT.WS[ws].newZ = true

GT.WS[ws].center = 'Center_Tower_01'

GT.WS[ws].drawArgument1 = 13

GT.WS[ws].drawArgument2 = 14

GT.WS[ws].LN[1].depends_on_unit = vympel_trackers;

GT.WS[ws].LN[1].BR[1].connector_name = 'Point_Gun_01'

GT.WS[ws].LN[1].BR[1].recoilArgument = 117;

GT.WS[ws].LN[1].BR[1].recoilTime = 0.4;

 

OK, I start the A-10C and make a mission with 4 CH-47 4-5 Km away and 100 feet altitude, speed near 0 of the Molniya, the fire control radar turn to the target and the AK-176 wait 15 seconds and start firing. First problem, and I need help, shell hit sea, 150-300 meters shorter away of choppers, I not sure, but, I think the AI not calculate the heavy trajectory shells of impacts. I make a second test, move to 1 Km near of the Molniya, just outside AK-630 range, but problem persist, the shells impact on the sea under the target.

 

On AK-176 reference tell for a special AAA shell with name ZS-63 with a 26 feet lethal radius (8 meters) , I not sure if A-10C can assign proximity fuze and detonator fuze to cannon shells. I need more investigation to them.

Edited May 12, 2011 by Silver_Dragon

[Speed]

AI generally has a bad artillery undershoot problem. Donno if it will be fixed.

 

Awesome that you are working on this! I wish we had heavy, land-based AAA.

[Kuky]

I think there is no way any ship will be using cannons to engage aircraft... sure the shell has got good range but shooting at moving target in all directions with single shels and low rate of fire is pointless... chances of hiting an aircraft (unless is flying in autopilot straight and steady) are pretty much zero... they don't have AAA guns for nothing, and also... what do you think happens with those shels that miss 76mm shell is not small... they have to land somewhere... so do you think they would just keep shooting larger caliber cannon shells like that that would eventually land anywhere on the land?

Edited May 13, 2011 by Kuky

[Laud]

I think there is no way any ship will be using cannons to engage aircraft... sure the shell has got good range but shooting at moving target in all directions with single shels and low rate of fire is pointless... chances of hiting an aircraft (unless is flying in autopilot straight and steady) are pretty much zero... they don't have AAA guns for nothing, and also... what do you think happens with those shels that miss 76mm shell is not small... they have to land somewhere... so do you think they would just keep shooting larger caliber cannon shells like that that would eventually land anywhere on the land?

 

When I served at the german navy, we constantly trained air defense with our 40mm and 76mm cannons. They're tracking the targets radar controlled and have proximity fuzes on the shells. You don't need to hit the target directly (simlar to A-A missiles) because they generate a shrapnel pattern of serious size which will likely damage or destroy the target. Also the rate of fire of a 76mm is about 0.5/s. Thats a serious threat when you approach it head on. This is common technique on all german small patrol boats, corvettes and frigates.

So the approach to have ships firing at aircraft and helicopters with their guns (up to 76mm) is absolutely legetimate.

 

I really hope this can be done!

 

However, this will not be of use against aircraft flying 20k+ ft and engaging a ship with some kind of guided weapon so it can stay out of range...

[Soul]

Not sure if any of you played Jane's Fleet Command, but just about every weapon that could be used to destroy an incoming missile or aircraft would be used. The probability of 3 weapons taking out a target versus 1 is huge, the CIWS is the last ditch defense for a ship. I watched russian cruisers knock my harpoons out of the sky with their 76mm and larger guns in that game.

[SmokeyTheLung]

love the idea, how's it all shaping up?

[STP Dragon]

Awesome idea!

 

What about the integrity check in multilayer?

If you "install" the mod on the server, is it possible to join without having this mod?

[Silver_Dragon]

Sorry but that mod has stalled. I can´t continue working on them, The A-10C program has not on my computer and has phase away, and I can´t search a viable form to give AK-176 bullet with proximity fuse or some type of argorismt to symulate them. :cry: I expected of somebody take my investigation and continue them.

Edited June 20, 2011 by Silver_Dragon

[Alfa]

When I served at the german navy, we constantly trained air defense with our 40mm and 76mm cannons. They're tracking the targets radar controlled and have proximity fuzes on the shells.

You don't need to hit the target directly (simlar to A-A missiles) because they generate a shrapnel pattern of serious size which will likely damage or destroy the target. Also the rate of fire of a 76mm is about 0.5/s. Thats a serious threat when you approach it head on. This is common technique on all german small patrol boats, corvettes and frigates.

So the approach to have ships firing at aircraft and helicopters with their guns (up to 76mm) is absolutely legetimate.

 

Yes indeed and its not limited to the smaller calibers you mention - e.g. Russian AK-100(100 mm) and AK-130(130 mm) can be used in the same fashion :) .

 

However, this will not be of use against aircraft flying 20k+ ft and engaging a ship with some kind of guided weapon so it can stay out of range...

 

No but it can be used to engage the incoming guided weapon itself and this would arguably be a more likely target than a helicopter or aircraft(not a good idea to approach within a few kilometers of a modern warship anyway due to SAM systems).

 

Most anti ship missiles travel in a direct line toward target and at very low("sea-skimming") altitude, which makes use of ships main artillery as "flak" against them quite feasible - there is even an approach in which shells are fired at the sea surface to create "columns of water" in front of the incoming missile in order to destroy it or throw it off course.

[Silver_Dragon]

Whit the exit of DCS:World and a free and "stable" plataform to work on them, I reborn my AntiAir Naval mod, but I assume with the large bore naval cannon anti air function continue no implemented on "World". I check the "old" molniya .lua data form and I discover a interesting issue..... the ships has only one or two radars implemented. In more cases, DCS only copy and paste ground system radars to simulate them. Great quantity of search and tracking radar has unused or non-existent.

 

The big radar systems with AEGIS or similar Russian radars has cut to detect targets to 30-35 km, and some of them only detect surface targets. The missile systems has the property and capabilities of your ground counterpart.

 

I expected fix them.... or only a little. I start the work with the Molniya, the more smallest combat ship on DCS equipped with radar.

 

I started seach the Molniya sensors on

 

GT.Sensors = { OPTIC = {

"long-range naval optics",

--"long-range naval LLTV",

--"long-range naval FLIR",

"generic tank daysight"

},

RADAR = {

"molniya search radar",

--"KKS R-790 Tsunami-BM" --êîìïëåêñ êîñìè÷åñêîé ñâÿçè Ð-790 "Öóíàìè-ÁÌ" ÐÊÐ "Ìîñêâà" êëàññ "Ñëàâà"

}

 

check the

Some issues:

Molniya search radar: a generic radar

--"KKS R-790 Tsunami-BM": no implemented radar system

`

 

All radar has assigned a detection range over a target cross-section = 5m^2, but the maximum radar range dont match with real detection range => target cross-section = 100m^2.

 

I supresed by "--" Molniya search radar and add to "db_sensors" two new radars on the real molniya:

- Kivach 3:

http://www.dtic.mil/dtic/tr/fulltext/u2/785338.pdf

44Nm vs 100m^2, 14Nm vs 5m^2.

 

- Monolit [brand Stand]

76Nm vs 100m^2, 24Nm vs 5m^2, Fire Control radar of Moskit [sS-N-22 mod 1]

 

["Kivach 3"] = --

{

type = RADAR_SS,

vehicles_detection = true;

air_radar = false;

scan_volume =

{

azimuth = {-180, 180},

elevation = {-3, 10}

},

max_measuring_distance = 81000,

detection_distance =

{

[HEMISPHERE_UPPER] =

{

[ASPECT_HEAD_ON] = 39000.0,

[ASPECT_TAIL_ON] = 39000.0

},

[HEMISPHERE_LOWER] =

{

[ASPECT_HEAD_ON] = 39000.0,

[ASPECT_TAIL_ON] = 39000.0

}

},

lock_on_distance_coeff = 1.0,

velocity_limits =

{

radial_velocity_min = 15,

},

scan_period = 12.0,

RCS = 100.0,

RBM_detection_distance = 25920.0 --target cross-section = 5m^2

},

["Monolit"] = -- [brand Stand] NATO designation

{

type = RADAR_SS,

vehicles_detection = true;

air_radar = false;

scan_volume =

{

azimuth = {-180, 180},

elevation = {-3, 10}

},

max_measuring_distance = 140750,

detection_distance =

{

[HEMISPHERE_UPPER] =

{

[ASPECT_HEAD_ON] = 39000.0,

[ASPECT_TAIL_ON] = 39000.0

},

[HEMISPHERE_LOWER] =

{

[ASPECT_HEAD_ON] = 39000.0,

[ASPECT_TAIL_ON] = 39000.0

}

},

lock_on_distance_coeff = 1.0,

velocity_limits =

{

radial_velocity_min = 15,

},

scan_period = 12.0,

RCS = 100.0,

RBM_detection_distance = 44440.0 --target cross-section = 5m^2

 

add them to "molniya" data form

 

--Molniya search radar: a generic radar

--"KKS R-790 Tsunami-BM": no implemented radar system

Kivach 3,

Monolit

 

I modified subsequence files with my info on the first post. In the first fire test.... has successfully. a Molniya engage four approach CH-52 with AK-176 and AK-360. Two CH-52 has hit by AK-176 :megalol:

 

Atached mission, log and track :thumbup:

 

I need investigate to add AAA ZS-63 shell to AK-176

Molniya AK176 test.trk

molniya ak-176 fire test.rar

Test molniya.miz

Edited May 3, 2012 by Silver_Dragon