Aviation covers a huge range of activities, both commercial and non- commercial, including private, flight training, police aircraft, air-ambulance, air charter and etc. General aviation aircrafts generally use piston propeller engine especially single piston propeller engine. This more traditional class of aircrafts includes nearly all aircraft from Wright Brothers up through World War II. Today, piston engines are used almost exclusively on light, general aviation aircraft. In this project conceptual design of a two seat, piston propeller general aviation aircraft will be performed. It is expected that aircraft will fly around 130 knots at 8000ft and to a range of 500 nautical miles. Design study will be performed both by taking design account in and comparing to competitor data, and with considering historical values. Design method is mainly based on textbook on Raymer 1.