07-24-2018, 05:32 PM | #41 |
Join Date: Mar 2005
Location: Maitland, NSW, Australia
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Re: ship dimensions (TL1)
Their first reconstruction of the Ulu Burun ship was a lot lighter but after examining a wider range of data, they decided that it was unrealistic and created a new model. The result is pretty good considering the limitations involved. IMO the modelling of the Kyrena ship is looking like it is too light since they used many of the same assumptions that the Ulu Burun team initially used.
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07-24-2018, 06:33 PM | #42 | |
Join Date: Jun 2005
Location: Lawrence, KS
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Re: ship dimensions (TL1)
Quote:
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07-24-2018, 07:19 PM | #43 |
Join Date: May 2005
Location: Oz
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Re: ship dimensions (TL1)
Exactly. abc/c³ is the ratio of the volume of the ellipsoid to the volume of a sphere of radius c.
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07-25-2018, 01:33 PM | #44 | |
Join Date: Jun 2005
Location: Lawrence, KS
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Re: ship dimensions (TL1)
Quote:
π abh²(3c-h)/3c² / π ab(2c)/3c² = h²(3-h)/2. And that lets us get h V 0.1 0.0145 0.2 0.056 0.3 0.1215 0.4 0.208 0.5 0.3125 0.6 0.432 0.7 0.5635 0.8 0.704 0.9 0.8505 1.0 1.0000 which lets us estimate the fraction of a ship's height that is submerged ("draft") if its burden is a given fraction of its flotation rating, for the case of a ship that is an ellipsoid with one of its principal axes vertical. At least, I think I've done the algebra right, and the numbers don't look too implausible.
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Bill Stoddard I don't think we're in Oz any more. |
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