yacht deadweight coefficient

Discussion in 'Boat Design' started by NAstudent, Sep 22, 2022.

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1. Joined: Sep 2022
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NAstudentNew Member

Hello, Everyone! Im a NA student. I'm about to design a yacht. Can someone help me? im looking for a deadweight coefficient of yacht. I dont have deadweight thats why i cant comoute for my Cd. Thank you!

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KayakmarathonSenior Member

Never heard of dead weight coefficient. How is it defined?

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NAstudentNew Member

Im calculating my preliminary particulars for new vessel.

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bajansailorMarine Surveyor

Welcome to the Forum NAstudent.

I presume that this is part of an assignment that you have been given?
If so, can you quote here the full text of what you have been asked to do?

I think that the deadweight coefficient might be the ratio of the deadweight (ie the weight of all the consumables and stores, and crew / passengers and their belongings, and maybe even some 'cargo') to the displacement at the load draft?

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RumarsSenior Member

Cd=Deadweight/displacement
Passenger ships are usually in the 0.2-0.4 range.

The real problem with yachts is their build and use case, a carbon foam racing boat is different from a steel long range cruising boat. To get a reasonable estimate one can use the number of berths (warm bodies) and asume a typical load (for the use case) per capita, for example 1t.

So what are you designing and how many people on your boat? Yacht is to generic, can be a 6.5m Minitransat or a 24m steel motoryacht loaded with toys.

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