Armament
Cannonballs - Spreadsheet for determining size of lead shot to use for cannon balls based on scale.
The Hull
Deck Planking - An article by Ulises Victoria. An explanation of the patterns used for deck planking. In Spanish and English.
Deck planking - Spreadsheet for laying out the planking.
The Rigging
Rigging Line, Chain and Block Size Tables - Spreadsheet - a set of tables showing rigging and block sizes for models of various scales assuming you know the full size dimensions.
Rigging Line and Block SIzes Calculator - Spreadsheet - calculates the scale size of all the different ropes, blocks and cleats based on the full size diameter of the main mast.
Standing and Running Rigging Schedules - Various ships revised standing and running rigging schedules.
Scaling your model
Model Scale Conversion - A simple method for converting scales.
Copier Scaling program - A small downloadable program that can help you with rescaling as well as blowing up or reducing drawings on your photo copier.
Scaling Converter program - Another handy little scale converting program. Change any value and the rest re-calculate to match.
Scaling Converter spreadsheet - Convert between systems of measurements as well as the scale.
Materials
Wood Used In Model Ship Building - A look at the various woods used in the building of model ships