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wrkempson

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Everything posted by wrkempson

  1. Fusion 360

    So I took the Fusion 360 challenge. Having used Turbocad for years, I found F360 to be fairly straight forward. The hardest part is finding the tool you want and learning the peculiarities of the program. I have done some work in Onshape and found it comparable. It seems to me that anyone willing to put in a bit of time, willing to look at training videos and willing to persevere can learn both F360 and Onshape in a reasonably short time frame. The work flow details differ, but not so much as to make difficult the adapting previous of methods to each program. Both Onshape and F360 are free cloud based programs. Onshape's free version is fully functional but limits the number of files one can store to 10. Fusion 360 offers the fully functional version for free to hobbyists. You do have to sign up and indicate that you are either a hobbyist or a start up business. The guidelines for signing up are very clear. I choose to model a 29' Launch in TC and F360 just to compare the two. I was learning F360 from scratch and have done a fair amount or work in TC. The results are appended. Do not get too excited about comparing the renderings since my skills in rendering are quite crude. The point is that each program produces an interesting model. Perhaps I will test out converting the models to 2D drawings at some future date. I should mention that launches were still whole moulded, so there was very little employment of Beziers in these models. This the the Launch from Fusion 360: And the same plan in Turbocad v. 19: Wayne
  2. In theory this arrangement keeps the planks for sliding alongside one another resulting in a stiffer longitudinal structure. In the hold of USS Constellation the ceiling planking has square cutouts across the seams into which a square block is inserted in order to stiffen the hull as well. The attached photo shows these openings, some of which have had the blocks fall out. Indicated in red are examples of an empty and a filled opening. Other instances are apparent as well. Wayne
  3. TurboCad 2017 Pro allows pdf files to be inserted as underlay objects, more or less as raster images. The resolution is not the greatest but it does allow it. You can also load your pdf in Acrobat, take a screen capture and convert in Paint to a jpg. The resolution is a little better that way. Actually, you may want to search the web with "pdf to jpg" and you will find several apps that convert pdf's to jpg's. I am under the impression that Acrobat Pro has a utility for converting to jpg's. I have no need for such, but they are there for your consideration. Wayne
  4. Color of ratlines

    Also for what it is worth, colors do not behave on small models the same way as on full size ships. Here we are getting into the area of scale colors. I would observe that a very light colored ratline on a black (maybe) shroud will pop out to the eye on the model. An even worse mistake that I have committed is to use a line that is too large. The scale size of the ratline should not be exceeded, but may be lessened if anything. When I look at photos of full rigged ships, the ratlines are barely visible unless one makes the effort to see them. I don't think the ratline should call attention to itself. As always, the usual disclaimer. Wayne
  5. I presume you are building the Model Shipways kit. If so, I found the manual at http://modelexpo-online.com/assets/images/documents/MS2018-Flying_Fish-Instructions-Complete.pdf . On page 24 Figure 36B there is a good illustration. The knightheads are the two timbers on either side of the opening for the bowsprit and each one receives an eyebolt. The Figure gives a profile and top view of the piece you are asked to make. The exact shape will be determined by your own model so the process is to cut and fit, sand, fit, shape again, fit, etc. until the timbers are in place. I do not have the plans, but the manual points you in the right direction. On the actual vessel, the knightheads extend from the rail level down along the side of the stem to a place well below the water line. On your model they are represented with only the visible portion above the deck. When you install them make sure they are secure as they will have quite a bit of strain on them from the fore stay that attaches to the eyebolts. It is unclear to me what your exact question might be, but maybe the above helps. Wayne
  6. Very nice. Getting the right entry and run can be quite a challenge. Wayne
  7. This is new to me as well. According to the Online Etymology Dictionary the term "staircase" appears in the 1620's in reference to the enclosure of the stairs. I know we are looking at a contracts 150 years later, but it seems to me the nautical "staircase" or "stair case" or "stair-case" might refer to iron railings, hand rails, etc. that might surround (encase) the ladders. So my vote goes to staircase=handrails. In support I note that this section of the contract comes far distant from where the storage rooms would be described, lying between the office cabins and the pantries. Thus, the use of iron for casing the ladders would be of a more ornamental nature. This is pure speculation. Wayne
  8. Dropping perpendiculars from the half breadth plan to the sheer plan identifies the darkest lines as the rail line, as you surmised. A few waterlines run outside this line because of the slight tumblehome. The diagonals generally run wider. The confusion at the bow seems (to me) to be the result of careless drawing. I'm not sure about the confusion at the stern. At least, this is my less than expert take on things. Wayne
  9. Astounding model. Thank you for the renderings. May I ask what software is being used and, if not too personal, what are the specs on the computer employed? Wayne
  10. I look forward to your progress. It looks like an exciting project. One very small thing. The box shows two pins at the ends of the spokes set into the felloes. I don't believe these are at all right. There are no pins or fasteners in the wheel. Everything was held together by the iron tyre (rim). If you consult photographs you should see there are no such pins. I feel like I am being more dogmatic than I should, so I am open to correction and reproof. Thanks for letting us look over your shoulder while building. Wayne
  11. Goodwin and Lavery are entirely different books. Goodwin is the resource for building the ship. Lavery tells you what to put in it. Both books are necessary resources. Add to them Lees' book on Masting and Rigging and you will have a nice trilogy for building these ships. Wayne
  12. Beautiful work. One word of caution: the thin gasket material works well for the braces. But later on it is used to cover the luggage rack and to close in the storage space beneath the driver's seat. On my coach the thin gasket material has dried out over time resulting in annoying curls. By now it is too brittle to work back into place. It is not impossible but I would look for a different material to use when coming to that part of the build. If I can I'll edit in a photo later. Wayne
  13. Dan, when you first purchased your Stage Coach I followed suit. I even spent time on the Scale Horse Drawn Vehicle web site (which makes me enjoy this forum all the more). I have now built ME's Stage Coach, Conestoga, Doctor's Buggy and Chuck Wagon. The carriage works shown by Mike seems to be the common method of supporting all kinds of wagons. If I were to put a New England whale boat on wheels, that is the arrangement to be used. I posted a few videos on YouTube on building the Conestoga that can be found by searching for "Building the Conestoga Wagon." I append one photo just for fun. I love what you are doing on the Stage Coach. Wayne
  14. 18th century sailing commands

    "I've always hoped someone would design a square ringed ship simulator" http://www.pdavis.nl/ Is graphically crude, but the elements of handling a square rigger are there. It's old by now, but you can get a feel for how the various sails affect the movement and handling of the ship. Wayne
  15. William L. Crothers

    Yes, according to http://www.surnamedb.com/Surname/Crothers
  16. The boats on Lagoda have the oars, paddles, mast, sail, harpoons etc., and line tubs. This photo is not terribly clear, but indicates the contents. In that this model at half scale was built by men who had personal experience with whaling, I would give this arrangement serious weight. Wayne
  17. Joshua Humphreys' Notebook

    Addictive, indeed.
  18. Beautiful. You have modeled everything except the grease. Well done! Wayne
  19. I had a hard time knowing what I was looking at on the drawing of the beam. This link has a clearer drawing from an engineering book of 1891. https://books.google.com/books?id=LuIOAAAAYAAJ&pg=PA350&dq=walking+beam+steam+engines&hl=en&sa=X&ved=0ahUKEwiO1ZGxxb_PAhWBOT4KHaQAA7YQ6AEIIzAB#v=onepage&q=walking%20beam%20steam%20engines&f=false Scroll down to see your style of beam. This beam is of a truss design and is made in two pieces, the inner skeleton frame which is cast in one piece and the outer strap which is forged in one piece. At either end of the strap are the "journals" for receiving the piston and driving rods. The "journal" for the air pump is cast into the skeleton. The strap is held to the frame by "gudgeons." The illustration in the link above shows the skeleton is thicker in the center. I'm sure this is known to you, but it was a pleasant time for me to track this down, so I thought I would share it with others like me for whom this project is presenting an entirely new field of knowledge. Wayne
  20. I like your observation that the block and tackle would support the arm when pressure was below the relief setting. Could the block and tackle also raise and then secure the valve in an open position so as to blow off steam quickly? Perhaps in an emergency situation or if the boiler was being shut down? Is the outside ball smaller (lighter) than the inside ball? Perhaps this is the manner of making a fine adjustment to the valve, especially if the arm were calibrated on the opposite side. Again, great work on the 3D modeling. Rope can be something of a bear to make until you get the hang of it (no pun). Wayne
  21. I have little knowledge of this subject, but would the boiler also have two or three relief valves? This is inspiring work of a superior quality. Thanks for letting us peer over your digital shoulder. Wayne
  22. Since no one has offered anything, I attach below the waist detail for the frigate Euryalus. It shows modifications made to the waist for 1803 to an earlier plan. The note reads in part: "The Skid Beams, Flats of Qtrdeck, Forecastle & Gingerboards to be shifted into each other &c ..." This does not settle the issue for any other ship, but it is a piece of paper from 1803 that indicates an unbroken run of planking at the waist on a RN ship. I agree that it could be read differently, but this is my take. Wayne
  23. Photographs of the Victorian Victory show two fair leads in the same place outboard. For example, Wayne
  24. Currently I am using TC v19 Pro. I have previously used the v14 Deluxe and Pro. I started with v4 (DOS based) before really getting into TC with v8. As per daves, the Deluxe versions are more than adequate for drawing plans. The Pro versions add the possibility for 3D modeling to a greater accuracy than Deluxe. (That is, Pro has a lofting function, Deluxe does not.) Earlier versions of TC are available at substantial savings and are well worth investigating. I have not gone to v21 or TC2015 because of the cost and the lack of a perceived need to upgrade. Wayne
  25. The problem with drop planks is that they hurt when they hit your toe. The problem with stealers is that they need a quarterback.

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