In this paper is conducted a study on the parameters of the helicopter design. The basic characteristics of helicopter will be determined by relationship such as take-off weight, rotor geometry, payload, cruising range etc.. A methodology for conceptual design of helicopters developed by the Mil Design Bureau was described by Mil and Tishchenko[1]. This paper also designed using Tishchenko"s methodology and design was carried out for the helicopter for payload of 1,700kg. A study of the characteristics of the helicopter due to the change of parameters is conducted in according with the results of the design.