A fighter used by the Serbian Air Force (Kraljevsko Ratno Vazduhoplovstvo Kraljevine Srbije) in WW1. This is built by Sinojovji Viroluki, a Serbian-born Russian, and the founder of VSAK or Viroluki Srpska Aviona Kompanije. It is first built in 1911 and Its first flight took place in February 12, 1912, at Niš, Serbia.

It was an idea by Sinojovji Viroluki to create a plane after the Wright Brothers' First flight, because he saw that planes could change the world and he created his own company, VSAK (the predecessor of VAK/VSK) in 1910 with his colleagues. His team built the first prototype of the VSAK-2A in October of 1910, his team worked hard to get the first prototype to run right, but in December, 1910, he successfully created his first plane with the help of his team and named it, VSAK-1 'Prvi' meaning 'First' because it is the first plane that his company built.

In June 21, 1911, he secretely planned a new plane to be built, and he creaed a runway for the planes in Niš, which is his hometown, and where the company is located. His team successfully created the second plane in December, 1911, after 6 months of secret work, they created the VSAK-2 'Drugi' meaning 'Second'. But due to a problem with the weather, the first flight was delayed in 2 months, and in February 1912, the first flight took place at his hometown, and 1912 is the year where Serbia now have its Air Force. During the flight, some military officials saw the plane and wanted to check it out, and when they got to the place, they told Viroluki to build them more of it and put machine-guns on it for the Serbian Air Force, and when he told his company that they got to make planes for the Air Force, the company rejoiced and built planes. They got the machine-guns from the military and they put them on the aircraft. And it was re-designated as the VSAK-2A 'Kraljevsky Soko'.

Controls:
NFC (Normal Flight Controls)