Calling the Supermarine Spitfire just an "airplane" is like calling Last of The Mohicans just a "movie", or Prince just a "guitarist". It's a borderline criminal understatement. Which is why the fact that a couple of good ol' boys down in Texas are making replica kits for sale is just so incredibly awesome.
Leading up to World War II, the prevailing theory on air supremacy was to build as large a fleet of bombers as possible, fill them up with bombs, and bomb the living sh*t out of your enemies. That was until 1931 when the British Air Ministry sent out a request to the top aviation experts and manufacturers: "Build us the ultimate fighter aircraft. We're going to need it."*
Several manufacturers returned with abysmal prototypes, forcing the ministry to consider approaching the Polish for their needs. Yeah, that bad.
That was until a little firm by the name of Supermarine approached the ministry well past the deadline with a revolutionary new design that appealed to a lad with an insanely awesome name: Air Commodore Henry Cave-Browne-Cave.
Hank decided to fly in the face of procedure and bypass the entire commissioning process, quickly drafting up a preliminary order under the very British sounding premise of the plane being a "Most Interesting Experiment". The plane delivered by the blokes over at Supermarine was The Spitfire.
*They definitely said a lot more than that, but you get what I mean.