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Calculation of Coeficient of wave resistace-Planing hull Calculation of Coeficient of wave resistace-Planing hull
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Old 03-06-2010, 04:17 AM
Anil@heisco Anil@heisco is offline
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Calculation of Coeficient of wave resistace-Planing hull
Hey Everyone,

I have to calculation Design loads for a planing vessel which inturn requires Cw- coeficient of wave reisitance to be calculated.
I searched through many books including PNA-vol2, things were not fruitful.
Can some one help me up plsease .

Anil
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Old 03-06-2010, 01:10 PM
jehardiman jehardiman is offline
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Most methods for planing boats calculate resistance in total and do not attempt to seperate Cw from Cf due to the intrinsic difficulty in doing that for a dynamicly supported hull.

Is there a special reason you need Cw, such as wake field calculation? There are other methods out there for far field wake evaluation.
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Last edited by jehardiman : 03-06-2010 at 01:11 PM. Reason: sticking e key
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Old 03-06-2010, 10:11 PM
Anil@heisco Anil@heisco is offline
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Thanks for ur reply Sir,

Actually i am calculating Design loads for a high speed vessel using DNV ,where for the calcualtion of Longitudinal acceleration and the forth coming pressure the value of Cw(i.e Coeficient of wave resistance) is essential. Could there be any formula to calculated it??????
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Old 03-07-2010, 08:57 PM
jehardiman jehardiman is offline
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Are you sure that Cw means wave making resistance? Normaly, logitudinal load for high speed craft is calculated by maximum speed (i.e. total slamming load).
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Old 03-07-2010, 10:16 PM
Anil@heisco Anil@heisco is offline
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Ya its the wave coefficient-Cw and i got the formula too, it was there in the Classification rule book Thanks for everything sir
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