Next, on to more about how things look and work.
Would assume deploying the webbing is something similar to parachute spider use, since it doesn't seem to need to be directly manipulated by the sailors, just spun out of the ships web masts, or whatever they are called.
It sounds like ship will typically have 4 sets of webbing, which I'd guess are deployed in a + or X shape around the ship. Since it sounds like you don't tack or otherwise change the webbing to sail in different directions I guess it just provides motive power straight ahead, no need chance how the webbing of the ship depending on which way the ether wind is blowing.
Next, shrouds are spherical, so I'd guess that airships would generally be pretty rounded themselves.
It sounds like warships are typically armored on the sides, but considerably less armored on the top and bottom. Of course, this could just be the case with lighter ships. Their armor may just be concentrated in the places a light ship is more likely to be shot. While heavier (and presumably less agile) ships might have heavier ventral and dorsal armor.
It's not entirely clear whether armor is fully ablative or more 'bouncy', but it looks like most battles are relatively close actions, which means that carrying armor heavy enough to bounce shots may be difficult.
Would think that fire would be a major concern on airships, since they are largely made of wood, and there's no handy ocean to get water from. Probably a fortune to be made in developing light weight firefighting foam, since loading your airship down with (heavy) water is probably not the most useful thing to carry. Though there are some interesting possibilities for water jackets, similar to how tank ammunition is stored in certain tanks.
Airships do have movable planes or winglets as control surfaces, though the airship needs to be going fast enough that there is enough air passing over them to provide much control. Would imply that they have pretty serious manuverability problems at low speeds.
Now clear how the steam engine or steam turbine moves the ship. I guess they turn props?
So would guess that airships look something like whales or zepplins?
Would assume that airships are not made of iron because of the iron rot. All the follow on possibilities, like Duralumin and Beryllium copper are too high tech. Though, in theory, they do probably have enough electrical power to smelt aluminum. Alas, power crystals go into airships, so no spare power for the industrial revolution.
And with no overseas colonies to exploit for more raw materials, I'd guess that resource wars of one sort or another are pretty common.