I thought I'd try my hand at an airship. This is the result. It resides on the smp server I hang out at.

It has a hidden piston mechanic controlled by two levers - One opens a hatch in the bottom rear end of the ship and the other one lets out a stream of water through the hatch for access to the ship from the ground.

In the bow of the ship is a room with two beds and one chest per bed. Also a ladder and hatch up to the deck.
In the lower aft there's the waterbridge mechanic and on top of that there's a captains quarters with some bookcases, a sofa and a large chest. The captains deck can only be entered through a hatch and ladder in the captains quarters.

The mast is covered in ladder both for looks and the possibility to climb the rigging. There is no problems climbing the mast up and jump out to the balloons.

The texture pack is a personalized Painterly Pack.