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Jeffrey Modell
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Everything posted by Jeffrey Modell
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I have the usual suspect textbooks: Lee, Marquardt, Zu Mondfeld, Davis. They have mast and yard length and diameter formulae for a number of nations but not Spain (except for Zu Mondfeld but his information is prior to the Napoleonic era and so not helpful .... Spanish spar formula probably changed with the surveyor). With the exception of the periods when the Spanish used English or French methods, is there a source of these formula? My books in Spanish, which I do not naturally read, all appear to provide information on Spars for actual ships (Frigate and above) and that just won't help me mast a brig though I do intend to work backwards and create formula that might be relevant to a brig. On the subject, a general book with Spanish plank sizes, hammock stancions, etc. would really help as well. I have several books by Enrique Garcia-Torralba Perez, books of photos of Museum ships, and a lot of original Royal plans and diagrams (many of which appear in said books as well), so that is how I have been picking up details but I really miss having sources like Goodwin and Lee. TYVM in advance!
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Do the Occre instructions for their Spanish warships that actually have a curved front deck area indicate whether to joggle? Do the instructions show spirketting on the inner bulwarks? TYVM in advance! I picked up the Occre Spanish frigate Diana kit. It does not joggle. I then contacted Occre and they eventually responded that Spanish ships used joggling; the kit was simplified. There is a glorious scratch build by someone in Spain on this forum where he uses conventional joggling for the upper deck and Dutch ends (Per Zu Mondfeld) on the deck with the main armaments that is open to the sky in the middle. IDK why he did the two differently, but do not assume it would be correct. I am going to believe Occre on this but I simply do not see it in historic Spanish models.
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Occre's Cazador Xebec deck planking
Jeffrey Modell replied to Etcher's topic in Wood ship model kits
Did you decide to joggle the ends? I am researching a Spanish-built brig and having a dickens of a time finding construction details such as whether to joggle the ends, case the open gun ports or leave the 3 layer edges showing, etc. I have Brian Lavery and Peter Goodwin for the Royal Navy, but need sources for Spanish navy construction! Oh, I have Navios de la Real Armada 1700-1860 but it is in Spanish and from the diagrams it does not feel like it gets into this kind of detail. -
I am looking specifically at an attempted historically accurate Royal Navy brig, circa 1783, which means no main yard or square main course; just a cross jack and a fore-and-aft main staystail. All of the references I have found except one say or show that the main preventer/spring stay goes below the main stay. Marquardt states it can be above or below. If the main preventer stay is below the main stay, it means (1) that when I hang my main staysail it must be to one side of the preventer stay, limiting its utility without rehanging, unless I put it on its own stay, and (2) any hanging tackles used to move boats, etc, that hang from the main stay will rub into the preventer stay. Petreus' book about the Cruizer Class Brig Irene shows this conventional rigging but she is a bigger ship at a later time period with a square main course and no fore-and-aft main staysail. Why is the main preventer stay rigged below the main stay? Should I just rely on the short blip in Marquardt and put it below on my period rig? TYVM in advance.
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Optimal Bowsprit Angle
Jeffrey Modell replied to Jeffrey Modell's topic in Masting, rigging and sails
I think shipwrights just fudged it. Probably you need a 3d model and to run myriad simulations in lots of weather conditions. I can see one height being best for a chase in good weather, and yet another being better in other seas (ignoring trysails and no sails for bad storms). So, first you would have to prioritize speed/safety and and normal condition handling vs. bad condition handling. Then, with that to set values, run the computer. A lot of math involved. -
It seems to me there should be exactly one optimal bowsprit angle for a specific ship in specific weather conditions, and then one for the weather condition of most concern. Authoritative sources such as Marquardt (page 26) note ranges for a bowsprit angle (e.g., 30 to 36 degrees, 25 to 30 degrees with the range varying over time), and further indicate that a cutter's bowsprit is near horizontal. The closest I have come to actual guidance is a comment in a manual that the angle of the rigging to the masts needs to be in a certain range, which might impact the bowsprit angle. Does anyone know of a formula source or table for an optimal bowsprit angle? I am looking at a 1783 launched Royal Navy Brig and several similar brigs.
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