[quote=@Skepic]
[@Willy Vereb]

Sure, that deal would work out fabulously. I'll update my NS with the materials. Mithril would definitely be used more so in light aircraft as opposed to heavier airships. 
[/quote]Well, that, and I doubt you'd be getting enough mithril to also use it on your airships.
Most other nations only really use mithril for high-performance springs or as expensive upgrade to certain high-velocity components like propellers. They are expensive because Mithral is relatively rare outside of Yllendthyr's borders and more importantly because nobody else has the industry or know enough of the procedure of creating Mithril to make that in sufficient quantities.
They are also prone to lose some of their qualities if melted completely so mithril outside Yllendthyr's borders is generally wrought cold.
It's slightly a pain in the ass both industry and logistics wise so I only advise using this for vehicles that really need it.