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TonyM

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Everything posted by TonyM

  1. Ed, I am using FreeCAD to build the 3D model and have just started importing it into Blender using .wrl. See my other posts on FreeCAD. Most of the model seems to be there but I am struggling with the representation of parts and surfaces in Blender. It recogizes parts but seems to need splitting of surfaces if the surfaces have a different material. If anybody has experience it would be greatly appreciated. Tony
  2. Thought I would post the latest developments on my Schooner. The next addition has been the stanchions which are built using a solid loft along templates housed in the bulwark part of each station. This solid representes the KnightHeads and Hawsepieces at the bow and then is cut using a cutting solid into the distinct stanchions. I do one set for the main deck and one for the quarter deck. I have colored then red to distinguish. At the bow I cut the Hawse pipe through the Hawse pieces and the hull. The next to be added was the monkey rail which wraps round the transom as the ta
  3. Kris, Some of this work was done before I joined the forum and has just needed to be refactored for the changes. So it is not as fast as it appears.
  4. It is probably time to discuss intention. I had started with some ideas in mind like building the real model in wood but the more I explored the topic which is quite well covered in this forum, the more I realized there are other possibilities such as creating a realistic image or generating a 3D printed model. I had not shown the surface generation which was done to create the waterlines by lofting the stations. The lofting was done in two parts - the forward main deck and the quarterdeck due to the disruption of the step. Both parts are then mirrored to get the port half. In hind
  5. Trying to catch up on these good ideas. Firstly, I have reduced the model to a half hull (port) and tested the mirroring of it to a whole hull. As I thought, there are problems with the decks which are lofted along with the stations and do not intersect correctly at the center line. The crown of the decking is controlled through the station splines and perpendicular constraints are not allowed on splines. However the symetry is much better. I took Phil's approach to generating the waterlines (shown in red below) by creating a plane for each level and interse
  6. Thanks Kris - I will get to your approach which looks interesting. Dr PR - thanks for the insight on getting the visuals of good fairing. I have tried this in a limited scope on my model and it is very revealing. The sample is the result of the LWL plane rectangle which has been extruded to a solid of 10 thou and then intersected with the lofted skin from the forward stations to form a line (red) running perfectly through the station points at the LWL. You can then examine the line and make corrections. (I haven't tested your correction mechanism). I
  7. Thanks vaddoc, I could go either way on the half or full hull. I will try the half hull approach since it is just a subset of the process. For the joint of the two mirrored parts constraints would be required - obviously the deck camber must be perpendicular to the middle axis. I forgot to mention the keel. The keel, stem and stern post were modeled as one piece but rabets were not drawn which would be a big improvement. I had eyeballed the intersection of the station lines to the keel but this should be to the outside of the rabet. The lines that I got were taken from
  8. I tried to get thte ship module working and failed - no blame allocation as it could have been my understanding. Kris - I liked your start and wanted to keep up with your posts. Stage 1 - Getting to the wireframe I started by bringing in the plans using the image workbench and arranging the three views on the planes and aligning them. Then I created sketches at each station (plus a couple at the deck step I will explain later) and at each waterline with constrained construction lines at their intersection. These constrained construction lines were copied fr
  9. Starting this topic to explore the FreeCAD program and discuss techniques to be used. Being relatively new to the 3D CAD scene, the approaches will be relatively simple and sometimes wrong and can be improved. The project used as an example is a hull model of the New England fishing schooner Adventure and supporting information from http://schooner-adventure.org/about-us/ and details from Howard Chapelle's "The American Fishing Schooner". At some point photographs of the real schooner will resolve details. The objectives of the project are to understand some techniques
  10. Thanks Kris, Yes the Sketcher B-Spline tool is not what I wanted either but I have used the control points in the plan view to coincide with construction points from named constraint values in the cross section view which is my authoritative value. I only use the waterlines in the plan view to verify that something is not adrift in the coherence of the original plan and they are not used to construct the hull and decks which are done only from the cross section sketches. This coincides with the way a real ship is constructed - the planking will go where it wants regardless of the
  11. Thanks, I saw your earlier post and wondered how far you had got. I could not find other posts on FreeCAD.
  12. Over the last 6 months I have been learning FreeCAD to develop a 3D rendering of a fishing schooner. The interesting feature of the software is that it is parameter driven in that you can develop offsets which can be used in a number of ways - read from a constraint in a sketch, mapped in and out of a spreadsheet embedded in he tool and used to calculate a constraint. The image scanned line drawing was imported into FreeCAD and the stations were plotted so that the intersections of waterlines and station profiles became parameter controlled locations which could be used to plot poi
  13. By popular demand here are some photos of the whole model in and outside the case. I found that taking the photos in lower diffused light and then increasing the brightness electronically seems to work well.
  14. So I am wrapping up this build log. The model is finished and in a case. Napoleon is standing at the starboard gangway. Here are some final pictures.
  15. Thanks Alan, Yes I had heard of the full figure. One of the problems I have is that the scale of the head would mean a very large bow to cover the whole body, horse and wings. The Victory model kit of Vanguard showed a standing figure with sword holding the severed head of the Chimera which he had slain. I have omitted the severed head. The model is finished. I am getting the case finished and I will post pictures soon. The last stretch was doing gunport lids and deadeye chains and plates. Nothing very exciting and very repetitive.
  16. Thanks Peter, I will post more when the next steps are done - Deadeyes and chains and the gunport lids. Then I will spend more time getting good pictures with better lighting. The model is going on display (even though it is still under construction) at the Merrimack Valley model ship club show starting this weekend. Tony
  17. Alan's comments are interesting - I went through the same questions but I seem to be working from a different plan. These plans are a long time before Bellerophon was put into service and even longer before Trafalgar by which time she had the Nelson paint arrangement aligned to the gunports as opposed to the previous alignment to the wales. The wording from NMM associated with this is: Description Scale: 1:48. Plan showing the body plan, sheer lines, and longitudinal half-breadth for building Cornwall (1761), Arrogant (1761), and Kent (1762), and later for Defence (1763)
  18. So - a long time has passed since I last posted. There has been a lot of development some of which I was not ready to share. I found some slow growth pine branches which came down in our yard and I dried them off and cut boards radially from the center so when I cut the planks along the grain there was hardly any visible. The picture above shows the side planking with the quarter galleries and rudder finished. The gun deck and upper deck are installed. The method is that the decks are removable and rest on the clamps. The gun deck has only bitts and hatches installed
  19. Thanks Tim, as we did not have a show n tell I did not bring it. Moving along - the wales are in place with a reasonable fit to the lines and gunports. I have used my other camera which is much better so here is a general view from the port bow.
  20. My photos are not coming out well. Here is a photo taken by a colleague at the Merrimack Valley Model Ship Club where I showed progress.
  21. So a long time has passed and many frames >100 have been assembled. The templates were changed to ensure that the upper holes are aligned in a horizontal line the same height above the keel for all sections. In these holes copper pins are inserted to align one section with the next. The photo shows a section being glued to its adjacent section with the keel push fit to ensure that the two pins and the keel are all aligned. Note that the rough gunport openings have been cut before gluing the sections. This allows a nice clamp location to keep pressure on the sections. All the sectio
  22. So things are starting to move forward again. Started work on the bow cant frames as I think they will be quite difficult. There are 19 pairs of can frames in the bow, The original plan to make frames out of 4 futtocks has been reduced to 2. Each regular frame will be made in 2 pieces joined together with a chock at the keel. The cant frames will therefore be one piece. Sections consisting of 4 cant half frames are assembled on the jig with spacers only between the outboard parts of the frame. The frames at the keel are glued to each other without spacers. The spacer width was calc
  23. Yes I started the log but it was some time after I started working on the model. The main obstacle and delay is not to do with the plans but with the wood I intend to use. I got hold of some logs of Dogwood a few years ago and built my last model from it. After the logs had dried out I halved them (lengthwise) and was then able to resaw boards from the half log using my bandsaw. My bandsaw from Micro-Mark is a 9 inch RBS230. The max wood thickness it will cut is about 3.5 inches and to do that requires a skip tooth blade. I could not find a 59.5 inch skip tooth blade and made one by b
  24. The technique I used for plans is simple. I downloaded the jpg of 74 gun 3rd rate from NMM and copied it into MS Word. The length of the gun deck was set using the Word Picture Tools line at the required measurement. Based on the ship's gun deck length (168 ft) and the scale 1:144 the line was sized to the correct length. The line was superimposed over the image and the image sized so that the gun deck matched the line. This image sizing must be preserved for all parts of the plan including the sections. The section part of the plan was cropped to the half for both the forward and
  25. Thanks. Yes I showed it at NRG. The figures were inspired by Justin Camarata's book on Waterline Dioramas where he has a whole chapter on figures. Tony
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