CP AND LCB AND ACTUAL SUBMERGED BODY
› DELFTship forum › Hydrostatics and stability › CP AND LCB AND ACTUAL SUBMERGED BODY
- This topic has 9 replies, 3 voices, and was last updated 12 years, 1 month ago by
Marven.
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AuthorPosts
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February 17, 2011 at 09:31 #34674
dssdaad
ParticipantHello,
When I select the actual submerged body for hydrostatic calculations I never set the Cp value 0.56 and LCB %-3.5 . Many times I tried it but unfortunately Cp is 0.61 and LCB is %-4. Is there any oppinion to reduce the Cp or any strategy to control these parameters?
Thanks A Lot -
February 18, 2011 at 08:38 #34675
MICHAEL KERR
ParticipantHi,
go to Transform–>Hull Transformation, unclick everything that you don’t want transformed then enter your Cp and remember to press enter after. . LCB you have to do that manually. -
February 20, 2011 at 00:12 #34688
dssdaad
ParticipantThanks for the answer but I think in free version there is no click/unclick option.
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February 20, 2011 at 00:36 #34689
MICHAEL KERR
ParticipantOK, I hav’nt got the free version to compare to the pro, but the clicking and unclicking is done in the bottom pane to the left in the Hull Transformation Window, it shows a simple list just like the layer properties list, remember your only apply the Cp to the canoe body so if there is no list unclick everything except the canoe body (hull) in the Layer Properties window, where it says Hydrostatics. Then in the Hull Transformation Window, type in your Cp, press enter, then click Transform.
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February 20, 2011 at 18:45 #34691
Marven
KeymasterThanks for the answer but I think in free version there is no click/unclick option.
Yes there is. There’s no difference between the pro and free version.
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February 21, 2011 at 09:12 #34692
dssdaad
ParticipantBut there is a window at bottom left corner and it just include ‘layers’. There is not any checkbox.
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February 21, 2011 at 10:43 #34693
Marven
KeymasterHow many layers do you have that have geometry assigned to it?
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February 21, 2011 at 14:35 #34694
dssdaad
ParticipantI have only one layer. I am just trying to model the hull.
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February 21, 2011 at 14:37 #34695
dssdaad
ParticipantI also did not understand the calculation, based on actual submerged body. Because Cp is Displacement/(Amax*Lwl)
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February 21, 2011 at 14:44 #34697
Marven
KeymasterIn fact CP is Displ/(L*AM) where L can either be LPP or LWL The former is used for large ships, the latter for boats and yachts.
See also the attached image showing the layer(s) in the transformation window.
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