13-piece plane

When you're building with only a tiny handful of parts, every piece counts. As far as I can tell, this Fokker D VIII plane by Karf Oohlu uses only 13 pieces, 14 if you count the 6x6 tile base. But even at this scale the model is still easily recognizable, and is full of details thanks to the minifig guns, 1x1 cylinder with "wings," and Batarang (!).