[quote=@So Boerd]
Issue with steam engines on airships is that it requires two very large engines (I assume Elan can't just be set fire to). So if you want a cheap thing that costs little Elan, can't go wrong with the Resian Rocket Barge™.
[/quote]

Well, it is said that "the combustion of Elan gives off a form of anti-gravity lift". Presumably you could make some kind of maintenance nightmare of a craft that combined the antigravity engine and the steam engine into one unit. If not, well, we've always got normal steam planes. Because [url=http://en.wikipedia.org/wiki/Steam_aircraft]a few happened IRL[/url] (The Nazis even considered building one for the long range bombing of America, of all things). Considering that steam engines are more powerful in this reality, it's entirely possible that planes could use steam.