Nicholson 32 Hull simulation
As simulated using "hullform" program from
hullform.com (offline, but
possibly accessible through the
including the software)
using ship's lines from C&N drawings.
- Rudder shape is not properly specified
- I don't really know what I'm doing - I am not a naval architect
- Lines from drawing no. A.284,
lines from drawing no. A.575 ( feet-inches-eighths )
- Lines converted to decimal inches,
converted to feet and decimals as input to hullform
- Hullform data file, with transom specified (AP section)
- hullform output (general),
hullform output (centres)
- calculated resistance curves (in tons, 0-8kt) (different curves are from different formulae)
- calculated resistance curves (in tons, 0-5kt)
- plots for draft,
- VRML model
See Hullform manual (PDF) for glossary
- Ship's lines entered from text on N32 drawings A.284, A.575
These are in the form feet-inches-eighths e.g. 2-3-5 is 2' 3 5/8".
- Lines converted to decimal feet (e.g. 4.56') suitable for input
to the "hullform" program.
(I could have used a spreadsheet for this, but used a custom Perl script
as I find that easier. The text files are tab-separated and can be easily read
by spreadsheet programs)
- Data entered to "hullform" as "import text file"
- Added an extra section (9a) to improve the shape of the rudder. It
just be my imperfect understanding of the process that required this.
- Entered displacement from specifications, guessed values for LCG
and VCG. Ran "balance hull", adjust LCG for spec. waterline
- Plot drag curves.
- I did not make the recommended fine-tuning of hull shape suggested in the
manual. This would have moved away from the actual ship's lines, and
in any case requires some care to do properly.
Andrew Daviel, September 2011