Hull parameters:
LWL:
Breadth:
Draught Foreward:
Draught Afteward:
LCB (%):
CB:
Midship Coefficient:
CWL:
Service Speed:
Bulbous?:
Transom?:
Yes = 1
No = 0
Afterbody form:
Pram with Gondola = 1
V-Shaped Sections = 2
Normal Section Shape = 3
U-Shaped Sections with Hognes Stern = 4
Appendage parameters:
Rudder behind Skeg:
Area:
Rudder behind Stern:
Area:
Twin-Screw Balance Rudders (2.8)
Area:
Shaft Brackets (3.0)
Area:
Skeg:
Area:
Strut Bossings (3.0)
Area:
Hull Bossings (2.0)
Area:
Shafts:
Area:
Stabilizer Fins (2.8)
Area:
Dome (2.7)
Area:
Bilge Keel (1.4)
Area:
Appendage Resistance Factor :
| (1 + k2)eq =a | ∑(1 + k2)SApp |
| ∑SApp |
| Resistance | Value (kN) |
| Total | |
| Frictional | |
| Form | |
| Appendage | |
| Wave | |
| Bulbous | |
| Transom | |
| Correlation |
Holtrop is a method based on statistical regression of model tests and results from ship trials. The method is used to estimate the resistance of displacement ships. The database covers a wide range of ships. For extreme shapes, the accuracy of the estimates is not good. The method may be used to assess qualitatively the resistance of a ship design. More
Developed by: Jefferson Flor, Thiago Gabriel Monteiro, Henrique M. Gaspar (A ShipLab web app.