Resistance performances of a leisure yacht with different keels, which are center and double keels respectively, are investigated by model test at circulating water channel. Flow patterns around the keels are observed by tuft test to make clear the relation between resistance performance and flow around keels. The results show that the keel does not affect free surface and double keel yacht has better performance comparing single keel yacht in resistance point of view.

Abstract
 1. 서론
 2. 시험조건
  2.1 회류수조
  2.2 시험조건
 3. 시험결과
  3.1 저항계측
  3.2 유동가시화
 4. 결론
 참고문헌

• 정우철(인하공업전문대학 선박해양시스템과) | U. C. JEONG
• 박찬원(인하공업전문대학 선박해양시스템과) | C. W. PARK