Hi Lumpy
Even though the dimensions above are from 1794 they should be useful to you. The most accurate and versatile might be the formulas from James Lees. You will wind up with very accurate dimensional information on the masts, spars, rope circumferences and blocks and more. It can be found on pages 183-189 in his book The Masting and Rigging English Ships of War. At your scale and to keep things simple you could start with using the breadth of the ship X 2.4 to get the length of the main mast. There are more complex formulas for your particular era but this should be relatively accurate lacking better information. Again, as your ship is Spanish, I would not be too concerned if the English formulas are a bit off. If you trust the main mast length in the kit is accurate you can start with that dimension. Once you have the length of the main mast, every other mast and spar length and diameter and line circumference can be quickly calculated using Lees' formulas. There may be similar scantlings elsewhere but I have never seen anything as complete and with such a wide range of years. R. C. Anderson gives some rope dimensions in his book The Rigging of Ships in the Days of the Spritsail Topmast 1600-1720 that should also be helpful. It is not as complete as Lees', but it is a great book to have in your arsenal for ships built before 1721.
There are used copies of Lees' book at Abe Books for as little as $45 including freight. There are used copies of Anderson's book on Amazon and elsewhere for about $10. My suggestion would be to get both books for now and the future.
As San Felipe is Spanish have you checked with the Maritime Museum staff in Madrid for suggestions and information?
Allan
