The planing hull is characterized by a large change in the posture according to the speed, and the shape of the propeller varies, so that the hull resistance varies greatly depending on the propeller used. Especially, the Savitsky system, which is widely used for estimating the resistance of planing hull, does not consider the characteristics of these propeller and ship bottom spray rails. In this paper, in order to investigate the difference in resistance characteristics between the propeller and the bottom of the propeller of 6m and 12m class propeller using propeller such as outboard or stern drive, A comparative test was conducted on resistance and attitude posture changes in the Circulating Water Channel of Institute of Medium & Small Shipbuilding. As a result of comparison test, it was confirmed that there is a clear difference in the attitude change due to the presence of the bottom floor spray rail and the change in resistance characteristics due to the installation of the propeller. However, attitude change with the propeller was found to be insignificant.

Abstract
 1. 서 론
 2. 연구배경 및 이론적 배경
  2.1 소형선박 추진기
  2.2 연구동향 분석
 3. 실험 및 분석
  3.1 모형설계
  3.2 시험 및 비교분석
 4. 결론
 5. References

• 박주식((주)LGM) | Joo-sik Park Corresponding Author
• 원준희((주)LGM) | Jun-hee Won
• 장동원((주)LGM) | Dong-won Jang
• 조제형(중소조선연구원) | Je-huyung Cho