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    2S35 Koalitsiya-SV 152mm

    GunshipDemocracy
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    Post  GunshipDemocracy on Fri May 29, 2020 7:17 pm

    marcellogo wrote:
    Yes, I didn't say that it's impossible, only much more difficult to achieve such kind of performance in a wheeled vehicle.

    Fact itself that they need stabilized legs is a proof of it as many tracked ones didn't have them anymore.


    I quess that's the trade off between cost/mobility - on desert or urbanized areas wheeled howitzers have better mobility and dont need lorries to move.



    Now, if they are needed  just to achieve 360° coverage it would be an excellent news.


    I didnt frankly tracked howitzers firing 360 pics. But I guess support legs are just to absorb recoil and not pass it to truck suspension + stabilize center of gravity.
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    Post  GunshipDemocracy on Fri May 29, 2020 7:29 pm

    dino00 wrote:

    Thanks thumbsup  very useful.


    my pleasure Smile
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    Post  GarryB on Sat May 30, 2020 4:26 am

    Firing Jacks are to direct recoil force into the ground rather than the trucks suspension.

    For tracked heavy artillery the suspension would be locked first to prevent damage from recoil.
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    Post  Hole on Thu Jun 11, 2020 9:57 am

    2S35 Koalitsiya-SV 152mm - Page 19 Parad_15
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    Post  Hole on Sun Jun 21, 2020 5:21 am

    2S35 Koalitsiya-SV 152mm - Page 19 Parade22
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    Post  dino00 on Fri Jul 03, 2020 7:57 am

    Interviews/ Article from TASS

    Fire raid with one gun." The Coalition-SV complex has surpassed world analogues


    https://tass.ru/armiya-i-opk/8785241 (in Russian)

    Russia’s latest Koalitsiya-SV artillery system to get new munitions

    The latest Koalitsiya-SV self-propelled artillery system outperforms the world’s best versions by key parameters, according to the developer


    https://tass.com/defense/1174457 (small piece English)


    Land Howitzer "Coalition-SV" will arm Russian warships

    https://tass.ru/armiya-i-opk/8876415 (Small piece English)




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    Post  GarryB on Sat Jul 04, 2020 6:19 am

    Nice.

    Have read reports from the past about adapting the naval 130mm gun used on the Bereg Coastal gun battery vehicle to the new 152mm ammo, but had not really seen any mention of actually using 152mm guns on ships again.

    A while back they did return the Sverdlov class cruiser to service so they could use its triple barrel 152mm guns for naval gun support roles... much like the US returned a few Iowa class WWII battleships with their 406mm guns for the same purpose, but honestly have not seen any mention of using bigger guns than the existing 130mm guns on naval vessels since.

    Ironically 10 rounds a minute is actually slow for a big naval gun but the naval gun turret is much bigger and much better automated to allow the much higher rate of fire to be not only achieved but also maintained for long periods.

    It seems they have eliminated the 76.2mm gun calibre but have introduced a 57mm gun due to improve ammo being developed for land based applications for the purposes of air defence.

    Such improved ammo would make the 57mm gun more useful as its range is much better than 30mm cannon rounds and it carries a substantial payload, but similar improved technology could also be applied to other calibres in use too... a nice airburst semi guided 152mm round would be interesting for use at extended range against low flying anti ship missiles or even small boats...
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    Post  Isos on Wed Jul 15, 2020 8:23 am

    Found on twitter. The two on thee left are Koalitsiya SV but the first has a bigger or maybe just longer gun when the second has radar to calculate trajectory.

    2S35 Koalitsiya-SV 152mm - Page 19 Ec6bcz10

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    Post  LMFS on Wed Jul 15, 2020 11:25 am

    Both on the left are the same, but from different years, there is some optical distortion on them.

    https://twitter.com/aviakurs/status/1283318531958898690
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    Post  GarryB on Wed Jul 15, 2020 11:41 am

    That is an interesting picture.

    The two guns in the centre look thinner and shorter than the gun on the left.

    Optical lenses can distort image but as far as I am aware would not increase length and thickness like that...

    Perhaps new propellants mean the middle gun can be shorter and also lighter with the same performance or perhaps better than the one on the left...

    Propellent is a funny thing... burn rates can mean better velocity can be achieved in a shorter barrel because of the burn rate and pressure generated by a propellant type... the radar suggests a newer testing vehicle that is working on exterior ballistics rather than interior ballistics...

    (note interior ballistics refers to what happens inside the gun, exterior ballistics refers to how the projectile moves through the air to the target and terminal ballistics means effect on target...)

    Both on the left are the same, but from different years, there is some optical distortion on them.

    So it is a collage...?
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    Post  The-thing-next-door on Wed Jul 15, 2020 11:52 am

    Look closely at the one on the left, the shadow of the gun is about the same length as the shadow of the others gun and if you look carefully at the proportions the one on the left seems to have be taken at a much closer distance to the vehicle than the other hence the gun and some other components look thicker and longer.
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    Post  LMFS on Wed Jul 15, 2020 12:39 pm

    GarryB wrote:So it is a collage...?

    Yes, all these pictures are collages. But I supposed at least they were taken the same year from the same position, which they are not. So no real value to accurately measure those vehicles angry
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    Post  Isos on Wed Jul 15, 2020 12:57 pm

    Yeah it seems it was badly photoshoped.

    You can also compare the head of the driver which is much bigger on the left. But what is confusing is that the hull has the same dimensions.
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    Post  LMFS on Wed Jul 15, 2020 1:41 pm

    Isos wrote:Yeah it seems it was badly photoshoped.

    You can also compare the head of the driver which is much bigger on the left. But what is confusing is that the hull has the same dimensions.

    They may have taken from different height and even different horizontal positions and then been adjusted based on the hull, size of the road marks etc., this would cause cannon and other details to be distorted.
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    Post  GarryB on Wed Jul 15, 2020 9:35 pm

    Look closely at the one on the left, the shadow of the gun is about the same length as the shadow of the others gun and if you look carefully at the proportions the one on the left seems to have be taken at a much closer distance to the vehicle than the other hence the gun and some other components look thicker and longer.

    Gun elevation would effect the shape of the shadow and a different angle of sunlight at a different time of the day could make a short barrel look longer and thicker than a longer and thicker barrel.

    When you combine two images into the same image there are all sorts of distortion tools in photoshop to make it look like it is really there, but the fact that it wasn't there means no conclusions can be drawn at all... it renders it totally useless... not even a passing interest.

    And that reminds me of similar images produced of the other vehicles which now come in to question... bugger...
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    Post  magnumcromagnon on Mon Nov 16, 2020 7:51 pm

    The most interesting part is in bold:
    In order for the command of the group of forces in the strategic direction (theater of operations), in accordance with the concept of the operation, to have the opportunity to strengthen the first echelon formations in the most important directions, it is necessary to have an artillery formation of a reserve in each district consisting of 4 - 5 formations of howitzer, cannon and anti-tank artillery. Taking into account the tension of the modern international situation, there is a need to include large artillery formations in the district artillery kit.

    Calculations carried out in the course of a number of research works indicate that the combat capabilities of the currently existing MFA kits of operational formations should also be increased in order to carry out missions to inflict defeat on opposing enemy groupings in the required volume.

    During the years of reforming the army, in connection with the elimination of the divisional command level in the Ground Forces, the combat capabilities of tactical artillery decreased many times over. Replenishment of these opportunities for pre-reform indicators is ensured by the restoration of the divisional link and the divisional artillery kit (as part of a self-propelled artillery regiment, a separate rocket battalion and a separate anti-tank division).

    2S35 Koalitsiya-SV 152mm - Page 19 Image008
    Figure: 2. IAC "Coalition"

    The next condition for increasing the combat capabilities of artillery formations is their rearmament with a 152-mm interspecific artillery complex (IAC).

    Calculations show that the task performed by the CAO 2S19 division in just 2-3 minutes with the same ammunition consumption can be performed by a battery armed with the IAC "Coalition-SV", and the IAC division can surpass a similar division of 2S19M2, 2S3M3 systems:

    - by the number of simultaneous fire missions by 3-4 times;
    - by the size of the area of ​​concentrated fire by 2-3 times;
    - by the size of the area of ​​various types of obstruction and accompanying fires 3 times;
    - by the time of execution of the firing mission by 2 times.


    A further increase in the combat capabilities of the IAC will be the use of promising high-precision projectiles in the complex, which will make it possible to implement the “fire-and-forget” principle.

    A key condition for increasing the combat capabilities of jet formations is their equipping with modern multiple launch rocket systems "Tornado-G", "Tornado-S", as well as high-precision long-range projectiles with a wide range of warheads. Their development has a significant impact on the effective use of MLRS in terms of reducing the readiness and reloading time due to the use of packages.

    However, in order to build up the combat capabilities of the MFA of the Ground Forces at the tactical level in order to achieve fire (strike) parity (if possible, superiority) with the opposing enemy grouping, breakthrough solutions are needed in the development of promising weapons and their adoption. One of them is the creation of a multipurpose reconnaissance and strike network (RUS) on the basis of a tactical high-precision missile system (ATRC).

    https://btvtinfo.blogspot.com/2019/02/blog-post_18.html

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    Post  lyle6 on Tue Nov 17, 2020 5:05 am

    That's roughly a threefold advantage in combat effectiveness conferred per combat unit, compared to a benchmark that more than holds its own against the more recent arrivals like the PzH 2k and K9 howitzers...

    Crushing is the first word that comes to mind when describing this level of fire superiority the Koala delivers over its closest competitors. The designers really out done themselves, well done.




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    Post  lyle6 on Sat Dec 12, 2020 11:02 pm


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    Post  GarryB on Sun Dec 13, 2020 5:50 am

    Seems to be a smoothbore...

    BTW the footage of the propellent in the microwave is about what you would expect.

    Propellent in a gun chamber pushing a projectile is contained and the pressure builds up to the point where the propellent seems to be exploding past the projectile when the projectile leaves the barrel, but if you put the propellent loose in a microwave the pressure does not build and so it burns more than it explodes and does not seem very energetic at all.

    Note on the snow the black dots of what appears to be soot but is probably unburnt propellent... the propellent needs pressure and heat to fully burn properly so when you burn it outside of a guns chamber much of it is wasted and you get a much less energetic "burn"...

    When launching a projectile however it will be much more energetic and effective...
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    Post  mnztr on Tue Jan 12, 2021 5:29 pm

    I was watching that doc, and the ignition system is SUPER COOL. BUT is this gun protected against external microwaves? What if the enemy were to fly a low pass over their supply trucks with a powerful microwave emitter or microwave bomb? Can they trigger all the charges? Something like this for example:

    https://www.theguardian.com/world/2003/mar/19/usa.iraq1

    The ignition system and cooling system are truly a leap forward. I assume the coolant has some sort of lubricant in it and the gun fires through a wet barrel which means most of the heat goes out with the liquid vs being transferred to the barrel. I wonder what the actual fire rate is? 12? 15? superb enginnering. This thing is a huge advance on a well established base requirement. Very impressive.
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    Post  lyle6 on Wed Jan 13, 2021 3:13 am

    mnztr wrote:I was watching that doc, and the ignition system is SUPER COOL. BUT is this gun protected against external microwaves? What if the enemy were to fly a low pass over their supply trucks with a powerful microwave emitter or microwave bomb? Can they trigger all the charges? Something like this for example:

    https://www.theguardian.com/world/2003/mar/19/usa.iraq1

    The ignition system and cooling system are truly a leap forward. I assume the coolant has some sort of lubricant in it and the gun fires through a wet barrel which means most of the heat goes out with the liquid vs being transferred to the barrel. I wonder what the actual fire rate is? 12? 15? superb enginnering. This thing is a huge advance on a well established base requirement. Very impressive.

    Not any more dangerous as current solid propellants are from external fires which are readily available than any microwave source. In fact it could be that insensitivity to heat could be one of the reasons why they had to switch over to microwave ignition, what with having to shoot an absurd amount of shells in a short span of time. The risks of cook-off with traditional propellant might just have been too high otherwise.
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    Post  kvs on Wed Jan 13, 2021 11:29 am



    Supposedly the currently under development US XM1299 is superior to the Koalitsiya-SV. That is not even just some fanboi
    drivel, it is claimed by western official sources. But the reality is much different. The XM1299 retains the manual loading
    approach of the M109. Where the SV can fire off 12 rounds per minute at its pre-loaded peak. The XM1299 appears to
    be able to do at most 3 rounds per minute. With existing shells the SV can hit targets 80 km away. The XM1299 and US
    long range artillery in general appears to be stuck in the range of 65 km to 70 km.

    The nominally bigger bore of the XM1299 gun (155 mm vs 152 mm) does not imply it can fire off shells with more kinetic
    energy. Similarly sized guns can have quite a spread in chamber pressure. The type of shell propellant used and how
    efficiently it is detonated is a critical variable as well. Looks to me like Russian guns such as the one on the SV can handle
    much higher chamber pressure than those of the US and minions.

    US blowhards are also claiming they will easily develop autoloaders. For some reason they never felt the need over the last 50+ years.

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    Post  mnztr on Wed Jan 13, 2021 12:28 pm

    lyle6 wrote:
    Not any more dangerous as current solid propellants are from external fires which are readily available than any microwave source. In fact it could be that insensitivity to heat could be one of the reasons why they had to switch over to microwave ignition, what with having to shoot an absurd amount of shells in a short span of time. The risks of cook-off with traditional propellant might just have been too high otherwise.

    Fires cannot go through containers. Are the charges stored in a microwave safe container during transport? I am sure they must have thought of this but would be interested to know what measures they took. The homogenious ignition is brilliant. I wonder why they have not come up with a more aerodynamic shell with a tapered rear, and use a sabot for firing. I wonder what gain would be from eliminating the flat rear.
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    Post  The-thing-next-door on Wed Jan 13, 2021 12:49 pm

    mnztr wrote:

    Fires cannot go through containers. Are the charges stored in a microwave safe container during transport? I am sure they must have thought of this but would be interested to know what measures they took. The homogenious ignition is brilliant. I wonder why they have not come up with a more aerodynamic shell with a tapered rear, and use a sabot for firing. I wonder what gain would be from eliminating the flat rear.

    The sheet metal walls of your household microwave are sufficient to reflect microwaves. I doubt the Russian military will run into much issue here.

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    Post  mnztr on Wed Jan 13, 2021 12:59 pm

    I wonder what the surge rate of fire for this gun is. Army Tech says it is 20 RPM with 16 sustained. if this thing can loose of 20 RPM and then relocate, that is fearsome, and more then doubles its value vs other SPGs. Would you rather pay 10m each for 10 guns that can fire 8 rpm or 25m for 5 guns that can fire 16 RPM, I would say the long term cost is much lower for the 5 guns and the logistics and support much simpler

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