Largest I've seen is a veeeeerey late-game battleship called "HMS-Pentavian T5" it looks like a modern-day battleship, is covered in turrets (29 guns in total) has a single Torpedo Bomber with a recommended crew of 110, I captured it in one campaign using a load of grenadiers and saved the design, she costs a whopping $8798 to build, $58 to maintain, a service ceiling of 89m and travels at a painful 23kph!

Originally posted by iHaveNoBananas:

Largest I've seen is a veeeeerey late-game battleship called "HMS-Pentavian T5" it looks like a modern-day battleship, is covered in turrets (29 guns in total) has a single Torpedo Bomber with a recommended crew of 110, I captured it in one campaign using a load of grenadiers and saved the design, she costs a whopping $8798 to build, $58 to maintain, a service ceiling of 89m and travels at a painful 23kph!

Nicely done hahaha, but how long did you play that compaign for? I spent like 6 hours on one but the enemy's tech level never got up there.

Originally posted by iHaveNoBananas:

Largest I've seen is a veeeeerey late-game battleship called "HMS-Pentavian T5" it looks like a modern-day battleship, is covered in turrets (29 guns in total) has a single Torpedo Bomber with a recommended crew of 110, I captured it in one campaign using a load of grenadiers and saved the design, she costs a whopping $8798 to build, $58 to maintain, a service ceiling of 89m and travels at a painful 23kph!

It also has steel WALL for protection, 12 seconds command cooldown, 5 seconds ammo delivery to the frontmost main gun, 15 seconds water delivery to the selfsame, no repair tools, firepoints instead of fire extinguishers, suspendium chambers rigged for chain explosions, 4 rifles in total as AA battery... Seriously, the greatest threat it presents is its ramming capacity, with that amount of modules it can probably grind away any enemy ship it can catch.
But at least it looks cool as hell, I guess.
BTW, you know you don't have to board a ship, if all you want is to fool around with the blueprint, right? Just copy it from the game folder to your designs and play away.