LACKENBY
- Last UpdatedOct 06, 2023
- 1 minute read
Purpose
To alter the distribution of vessel sections, thus altering the volume and longitudinal centre of volume (buoyancy).
Syntax
LACKENBY < DRAFT > $N < TRIM > $N < VOLUME > $N
< LCB > $N < XLOWER > $N < XUPPER > $N
< TOLERANCE > $N </REFIT >
Description
Having imported a set of curves from a Lines datastore, or created curves using Surface intersections, the distribution of these curves can be modified to alter the volume and centre of volume.
This form of scaling may be performed over the entire length of the vessel, or may be restricted to a single region. This is accommodated by the XLOWER and XUPPER values.
A surface may be re-fitted to the scaled curves automatically by using the /REFIT option.
Command Qualifiers
|
DRAFT $N |
The draft at which the calculations are to be performed. |
|
TRIM $N |
The trim at which the calculations are to be performed. |
|
VOLUME $N |
The required volume of displacement. |
|
LCB $N |
The required longitudinal centre of buoyancy. |
|
XLOWER $N |
The lowest x-value over which curves are to be modified. |
|
XUPPER $N |
The highest x-value over which curves are to be modified. |
|
TOLERANCE $N |
An internal tolerance (normally 0.0001). |
|
/REFIT |
Option to automatically refit a surface after the scaling. |