Here are three simple fighter paper models during World War I, they are Sopwith Camel, Fokker Dr.I and Bristol F.2. The papercrafts were created by petrsimcik. All three paper fighters in colored and blank two versions.
The Bristol F.2 Fighter was a British two-seat biplane fighter and reconnaissance aircraft of the World War I flown by the Royal Flying Corps. It is often simply called the Bristol Fighter or popularly the "Brisfit" or "Biff". Despite being a two-seater, the F.2B proved to be an agile aircraft that was able to hold its own against opposing single-seat fighters. Having overcome a disastrous start to its career, the F.2B's solid design ensured that it remained in military service into the 1930s, and surplus aircraft were popular in civil aviation.
You can download these aircraft paper model templates here: Three World War I Fighters Free Aircraft Paper Models Download