# Model Ship - Basic Resistance Calcs

Discussion in 'Hydrodynamics and Aerodynamics' started by shipinteraction, Feb 25, 2014.

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### shipinteractionJunior Member

I am studying the interactions between two vessels as a project.

I have been give the task of calculating the basic resistance values for a model based on a range of particulars (shown below). I have been advised to do this using Holtrop & Mennen.

The vessel particulars are as follows.
Model

LOA (m) 1.71
LBP (m) 1.57
B (m) 0.3
T (m) 0.125
S 0.735417 Calculated using the Denny formula
Disp (kg) 50.224
Vol Disp (m3) 0.050224

Does anyone have a spreadsheet which will allow calculation of the resistance in Newtons or can help me with these calculations?

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### TANSLSenior Member

Have a look, but check first that your boat is within the valid limits to apply the method Holtrop (see the first page, top right, of the worksheet) :

#### Attached Files:

• ###### Holtrop.zip
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### Olavnaval architect

There are several Holtrop-Mennen spreadsheets in the Spreadsheet Library here at boatdesign.net.

Please keep in mind that Holtrop-Mennen has derived from model tank tests and includes a correlation allowance to account for scale effects.

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### shipinteractionJunior Member

Hello TANSL and Olav.