# Cosine Wherry, Water Sculpture on the bulb of a submarine

Discussion in 'Hydrodynamics and Aerodynamics' started by mtumut, Jul 6, 2016.

1. Joined: Mar 2005
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### mtumutJunior Member

May I request from forum members to explain me , the cosine wherry design process ?

I have WB 100 but I could not understand the invention .

I can only see the wave crash on the bulb of a submarine elegantly and everything is so beatiful and better than whatever sculptors tries to create.

I think Cosine Wherry have a shape like a submarine bulb where bulb pushes the water in to a sculpture form.

As you can see I can see something but I cant explain.

Please , may I please from you to invest 15 minutes to explain things ?

Thank you,

Umut
Istanbul

2. Joined: Mar 2005
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Location: ISTANBUL

### mtumutJunior Member

I thinked a little bit , there is a horizontal cosine graph at the WoodenBoat 100 and AFAIK,
the displacement of the sections must follow that graph like a Napoleon Hat.

Is it true ? If we give the volume every section , does the boat shape comes automatically ? I think I read the Colin Archer comment on wave theory and shape comes from mid section shape , dimensions and prismatic coefficients.

When all inputs and volumes touch each other , boat comes to hand.

I want to understand what is exponent which seems to me related with cp ?

Do I understand correctly ? Can you please help ?

ps. I thinked a little bit more and remembered front middle and back sections calculated indiviually , is it true ? Which equation used for each ?

Thanks,

Umut

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### gonzoSenior Member

My understanding of the design, is that it is a proof of concept. The designer thought that he could use that cosine equation to design a boat. It is OK, but nothing ground-breaking.

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