Question

Is there a way to get a hydrostatics table with the LCG fixed and the trim allowed to vary?


Answer

To accomplish creating a hydrostatics table with the LCG fixed and the trim allowed to vary we have created a macro which cycles through several drafts. Below is the macro to illustrate this.

PROJECT HSLCG

read fv.gf report

VARIABLE DFT,DFTINC

MACRO SETDRAFT `Sets LCF draft as given in variable DFT, `and solves for trim keeping CG constant. `Must call about 4 times or until SOLVE does not change LCF draft.
DRAFT = {DFT}
SOLVE WEIGHT,TRIM
/

MACRO HSLCG
.SETDRAFT (4)
STATUS WEIGHT
GHS
SET DFT = {DFT} PLUS {DFTINC}
/

LCG = 4.5 VCG = 4.0

SET DFT = 2 `<-- Initial draft SET DFTINC = .5 `<-- Draft increment .HSLCG (5) `<-- Number of increments

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