Ultranova Wouldn't they come with such a barrel?
Well, not if they use a different propulsion method, like a pressure chamber or just anything that uses something that doesn't require, ya know, fire.
Is it due to the fact that the part is only used for thrusters?
Came up with some extra stuff that would/could happen
Tractor Beams will have a larger power use the farther the target is, regardless of whether or not it's in either push or pull modes. They would also have to be constantly fed coolant the moment the turret activates, as friction and the beam would cause tons of heat.
Any Laser weapons (not counting Ion Beams and/Or maayybbee heavy lasers) would have no effect on armor due to the lack of armor-piercing capabilities. Laser ships would have to focus on continuous bombardment to heat the armor up to get through.
Armor would be incredibly tanky against lasers
Angled armor would be able to tank standard and maybe Heavy Cannon rounds (Heavy rounds would be harder to deflect due to the larger caliber gun shell)
Ion Prisms can deflect enemy Ion beams (So basically they'd be reverted to when they were first introduced without the Enemy damaging the prism with ions)
Fires Could be started if Engine rooms are damaged, Reactors are damaged or Destroyed, Ammo Factories and Storages if either are damaged or destroyed (And if they are hit with either full ammo stockpile in the factory or any amount in the storage, the explosion radius and fire chance is increased dramatically)
Fires can happen with overheated parts, depending on what weapon/part, how much it's been used, etc.
Fires would take longer to put out depending on which part the fire started in or spread to (Like a ammo or reactor part would take like 5x as long as a crew bunk or corridor)
Ramming would be possible with anything (except crew)
Scaffolding would not be able to be used as a walkway without space gear
Scaffolding would be able to act as a successful repellant against missiles except to Nuclear missiles
Scaffolding could be used against allied ships or the ship itself if it with missiles, cannons, flak, or railguns, as the scaffolding would be turned into shrapnel.
Fire could be caused by lasers, as the intense energy would make it easy to set fire to anything except armor and shields (but not shield generators. shield generators can be set on fire)
Fire can be caused by Electrobolts, to some extent.
Shields put under enough strain can overheat and cause fires
Cannon Rounds can get lodged in armor
Heavy Cannons would most likely need special systems to load the upward-facing loader. This would provide a similar reloading time to the Ingame Heavy Cannon (without Auto Reloaders)
Standard Cannons would have a faster reload time in general due to the rather small shell size
Ships will degrade on the outside, no matter how well kept the systems are. This degradation would most likely effect exposed armor
Armor would need some way of accessing it in order to maintain it
Explosive Charges would have a bigger bang for their buck or would cause no damage to any parts near the explosive
Explosive Charges could cause shrapnel
Mines would have a far bigger range for their "shrapnel"
Mines would have the possibility of being a "dud" and not exploding
Missiles (except for EMP) would have the possibility of being a "Dud"
"Casemates" would be possible, though it depends on how the cannons are changed
Reactors would cause internal shrapnel, killing crew either through explosion, fire, or shrapnel
Fire Extinguishers would have a harder time putting out fires (if they are just standard fire extinguisher), as fires on ships are most likely going to be overheating rooms, thruster fuel, Or just being used as a quick cooling agent
Thrusters would require Fuel instead of Reactor Power (As the current in-game depiction of the engines shows fire coming out the thrusters, not something like a light coming out of them)
Command Rooms would require more crew the bigger the ship