Dispersion has always been an issue with ballistic weapons at distance. The best-known example I think is the Iowa class' Mark 7s, which could hit targets at maximum range once in a blue moon. I don't believe the manner by which the projectile is accelerated changes this fact.
PRC/PLAN Laser and Rail Gun Development Thread
- Thread starter SinoSoldier
- Start date
Is this a naval rail gun prepared for alleged Type 057/058 Large Cruiser? 
Is this a naval rail gun prepared for alleged Type 057/058 Large Cruiser?
Why do you think this is a rail-gun? IMO it is clearly none.
Well, I just don't understand why the gun is so long??? Is the deck enough long to contain it? It's very inconvenient to put it on deck.
As a general rule - Because the 155mm gun requires more propellant than the 130mm gun to fire the larger and heavier shell. This requires a longer gun barrel in order to permit the larger quantity of the propellent to be combusted completely inside the barrel as the shell is propelled through the barrel tube, while also ensuring that the required muzzle velocity and accuracy are met.
Besides, a railgun barrel is much thicker and bulkier than what is photographed on that step-deck trailer, such as this experimental one on the Haiyangshan LST:
Is the deck enough long to contain it? It's very inconvenient to put it on deck.
Yes. With proper designs that allocate sufficient spaces for the gun to rotate around, I don't see why that's difficult or inconvenient to install and operate.
In fact, here's the 155mm MONARC gun turret (which is taken from the PzH 2000 self-propelled howitzer) looks like while being installed on the Sachsen-class Hamburg for trials in the early-2000s. The Sachsen FFGs have a pretty close beam width as the 052D/DG DDGs while being 14-16 meters shorter.
If anything - The length of the barrel would be the among the least of the concerns, given that the gun turret are always mounted fore of the forward VLS cell groups on DDGs and FFGs, meaning that the gun will have a wide-enough arc of fire while also staying clear of the ship's superstructure to the aft.
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lcloo
Captain
Here is the fun part. The self-propelled howitzer type 05 has a gun spec of 155/52-caliber. What it meant is that the internal diameter of the gun is 155mm, and the length of the barrel is
155mm X 52 = 8,060mm or 8.06M long or 26.445 feet.
And the 130mm naval gun on type 055 DDG is said to be 130/70-calibre (need to be confirmed)
130mm X 70 = 9,100mm or 9.1M long or 29.86 feet.
155mm X 52 = 8,060mm or 8.06M long or 26.445 feet.
And the 130mm naval gun on type 055 DDG is said to be 130/70-calibre (need to be confirmed)
130mm X 70 = 9,100mm or 9.1M long or 29.86 feet.
If there is any relationship to the 130mm gun used on 956E/EM destroyers, then it's indeed 130/70.
Current Russian A-192 is 130/54 (6990mm long).
2S35 Koalicija (no naval version yet) is 152/54.
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Looks much more like something that would be truck mounted (and not that truck), like an upgunned PCL-181.Is this a naval rail gun prepared for alleged Type 057/058 Large Cruiser?
lcloo
Captain
The depiction clearly stated 舰炮 Naval Gun.