Topic: Hull Construction.

[seasalt]

Hi Fellow Members.
I have two plans for a J class destroyer one very old showing the hull as being flat bottomed the other a John Lambert set of plans shows the hull as being curved bottomed. The model will be 1/72 scale, what would be the effect on the stability of the model in the water between the two types of hull.

Regards Theo.

[colin]

Firstly i would say that it depends on how much (percentage) of the hull is below the Waterline

The main difference would be:
A flat bottom hull would tend to sideslip when the Wind catches it on the broadside were the Hull with a keel would tend to run straighter.

hope this has helped a little. 

[seasalt]

Hi Colin.

Thanks for the rapid reply, but i have noticed on the JL Plans redrawn from official drawings that there is no keel The bottom centre comes to a V shape.

[colin]

a V shape hull acts as a keel....were as a U shape hull will be prone to Wind..

[seasalt]

Thanks Colin that has sorted out another problem.