well i do not think this as masterpiece, but today i try to design an airship that only equiped with a single cannon. i want it size as minimum as possible and simple to create, easy to control and reliable. this idea is come from iron man suit armor :D....so here you go
it is very small, isn't it?
so let's climb up.
then here is the rear view....
lets get in and close the gates
so that's it. it is simple to use.....in the inside you will be able to pull up the anchor, turn on the aether pump or water pump.
and you just have to look up for triger the cannon by using flint and steel
i haven't try this out to fight the Ender Dragon...but it seems a good idea. :D