Abstract
In the process of aircraft conceptual design, we determine the best aircraft configuration so that performance requirements can be satisfied. Aircraft secondary power systems, such as an environmental control system (ECS) and a hydraulic system, are indispensable for aircraft operation. However, the traditional aircraft conceptual design method has not considered the effect of these systems except for the weight estimation. Therefore, to think about the feasibility of the best designing point more in detail, conceptual design method considering aircraft secondary power systems is proposed in this paper and influences of secondary power upon the conceptual design results are examined. Although the proposed secondary power system model is a conceptual one, the results indicated that the aircraft secondary power systems, especially ECS, has some impact on specific fuel consumption which affects the design results.
