That is the Soldier, a bread and butter airship I made for less than $500 and I consider it a standard Airship all round. The question I asked myself is: How big is that?
Now, the average guy stands about six feet tall, and a one block ship module is slightly higher than that. So I'm going to use two meters instead. Why you ask? Because I like metric and you should get over that fact! Besides, it'd be a lot easier than using six and a half feet.
alright back to my argument.
Now, observe the cargo door at the top left of the ship. That looks pretty square to me. So each block is roughly 2x2 meters. Then, with such information, I can deduce that this very ship is six meters tall (~19.69 feet) and 24 meters long (~78.74 feet). So a standard Airship using a suspendium chamber is roughly 24 by six meters.
I imagined I would have something witty to say about this, but alas t'is not to be. Hope you find the scale insightful!
The official conversion rate is 7 pixels -> 1 metre, so 1 block is 2.28 metres, and the ship is about 27m long. :)
Alright then! Thanks!