Issa got an idear for the name of the invention as a whole:
[Insert Inventing Engineer's name here]'s Splendiforous ship of Gaseous Mainsailing.
Basically, I tried to take a note from the Empire book with that.
But, for this individual machine, I would go for something along the lines of a bird, like:
The Avian, The Imperial Hippogryph, The lead Cloud, or something more religousy, like Sigmar's Deliverance, Avenging Angel, Ulric's Hammer (if you're into that)
Or, you could also use a name that combines Fluff and Games, and after the first game you use it in, you could make a reference to the oddest thing that it did/ happened to it. Something along the lines of:
[again, your Engineer's name]'s Rat smasher, Sigmarite Fireworks, The Flying Pig, and, most notably, The Count's New Toy.
I hope these help, I really came up with them on the spot, but I hope you enjoy them.