Note that I don't have models for some of these as of yet; I'll update this page later to add pictures of the models if/when they are completed. Consider this supplemental material.
About this creation
The Zephyrian P-1 was the first production fighter aircraft in Zephyria. It was roughly 17 feet in length, being of something akin to a conventional 1910's configuration--synchronized twin .30 caliber (7.62mm) machine guns, canvas-and-wood construction, and wings in a biplane configuration with the upper wing being attached to the lower one by struts and wires. It did not see front line combat.
The P-2 was a modest improvement compared to the P-1, having a mostly-metal construction and more streamlined struts, but retaining an open-cockpit biplane configuration. It was slightly longer.
The P-3 was the first monoplane in service with the Zephyrian military, being a parasol-winged aircraft with greater streamlining compared to the biplanes preceding it.
The P-4 Hawk was the first low-wing cantilever monoplane in the Zephyrian Air Force, and the first Zephyrian fighter to see combat in the war. While it could match the Bolo, as "Misawa" aircraft began to engage Zephyrian fighters head-on rather than relying on its tail gun, the P-4 showed its age. The P-4D was the first Zephyrian fighter to break from the tradition of using solely twin synchronized .30 caliber guns, adding twin .50 caliber (12.7mm) harmonized MGs in the wings. The FN Osprey, a naval derivative of the P-4, continued service a short time longer until the FT Fishingcat replaced it.
The P-5 Eagle was a derivative of the venerable A-1 Falcon, developed as the P-4's replacement, essentially a jury-rigged closed cockpit monoplane fighter. Early P-5s suffered from the same engine troubles as early P-1s, and in addition to this the P-5's distinctive bubble canopy was very difficult to make with the manufacturing techniques of the time, keeping numbers low, and the "Eagle" was poorly armed, and thus it was mostly piloted by more experienced pilots whom had flown in early model P-4 Hawks, which shared the same twin .30 caliber armament as the Eagle.
Having gained valuable insight from previous aircraft projects such as the P-5, Zephyrian Aircraft Factory, which was renamed Zephyrian Aircraft Group during this craft's development, developed the P-6 Garuda, a modernized fighter with a more conventional configuration. Relatively heavily armed with twin .30 caliber guns in the fuselage but also twin .50 caliber guns and twin 20mm autocannons in the wings; this arrangement was chosen to allow older Zephyrian pilots to have less difficulty adjusting to the newer aircraft, as they were trained on synchronized guns. The P-6 was far more successful than the P-4 and P-5, becoming Zephyros' main land-based fighter of the war. It was developed into two experimental aircraft, the Zephyrian Rotowing and the Zephyrian Flettner.
The Zephyrian P-7 was a scaled-down, light-fighter derivative of the P-6, and was thusly nicknamed "Garuda Chick," with it being intended to be a stopgap until aircraft factories could begin assembling the larger P-6; it had the same armament as the Garuda, but was the same (shorter) length as the P-5 and A-1 which were already in production, among other simplifications. As production of the P-6 began almost immediately after the YP-6 prototypes had finished testing, only a limited production run was made of the P-7, with only one squadron being equipped with it.
The Zephyrian Roc was a very-late-war project, being an attempt to use the newly rediscovered Turbojet engine to drive a propeller--a configuration known as a "turboprop"--rather than simply producing a conventional jet fighter. The intention was similar to the equipping of the concurrently-serving F2T Sailfish with a motorjet/propeller engine combination--increase the maximum speed whilst keeping the stall speed manageably low. The resulting aircraft gained its designation of "Roc" from its large, low-aspect-ratio wings and tail surfaces and its longer fuselage length than most other Zephyrian aircraft, at 37 feet; the Roc was nearly as large as the B-4 medium bomber. The Roc, like the Eagle before it, had early engine issues due to the turboprop being a new type of engine in Zephyros, and suffered from the range problems of turbojet aircraft, (albeit not as much,) and thus Rocs had to be shipped to captured airfields nearer to Esthen to be able to operate there; they could not be ferried through air due to their shorter range. Despite this, the Roc was one of the better Zephyrian fighters, and was one of the first to ditch the twin .30 caliber guns entirely, instead mounting .50 caliber guns in the synchronized positions and four 20mm cannons in the wings.