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#1
05-04-2012, 04:42 PM
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| resistance of a vessel Generally speaking lets say a pnmx with bulbous bow does it have less resistance than the same pnmx without bulbous bow design. As a result needs less effective power to move a the same service speed? thanks and best regards John
__________________ Give me a place to stand, and I will move the Earth  |
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#2
05-04-2012, 09:15 PM
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| Bulbs are very sensitive to speed and displacement, so at ONE speed above a Fn UNIQUE to the hull form, and ONE draft for the hull form, yes, a bulb would need less effective Hp to move at THAT speed. This is why route ships and things like cruise liners use them and other ships do not. See the following threads. Bulbous Bow Design Bulb Quest Again... Forward Torpedo Tube on Ships
__________________ A vessel is nothing but a bunch of opinions and compromises held together by the faith of the builders and engineers that they did it correctly. Therefor the only thing a Naval Architect has to sell is his opinion. |
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#3
05-05-2012, 08:21 AM
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| Hi jehardiman, thanks for your reply. you know I'm just evaluating some results from hullform and I got confused !
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