I actually built this a while ago, but a viewer requested I post it since it was missing from PMC. This is basically a scaled down version of my typical warships, almost 1/3 the size of the Destroyer Mk II. It lacks the larger ships flaming arrow strafing guns, but still has an adjustable range main cannon, the bomb droppers, and the fire guns that can fire into every arc. It also has a very small hangar bay capable of holding a single small aircraft (included).

This is a good warship for a server that doesn't have much processing power and can't handle the larger ships flying around. Or if you want a battle with lots of warships at once without lagging the server too much. 

For more information about Movecraft, the plugin that let's you fly these ships, click here:
http://www.planetminecraft.com/mod/movecraft-reloaded---loraxe42s-fork/

You can use the weapons without the plugin, so if you just want to fire the cannons and guns you don't need it.